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@@ -0,0 +1,367 @@ +# User visible changes in `mruby4.0` from `mruby3.4` + +"**_NOTE_**:" are changes to be aware of. + +# The language + +## Pattern Matching + +mruby now supports pattern matching (case/in) syntax: + +- Basic pattern matching with `case`/`in` syntax ([dadfac6](https://github.com/mruby/mruby/commit/dadfac6)) +- Array pattern matching ([ec67fd9](https://github.com/mruby/mruby/commit/ec67fd9)) +- Hash pattern matching ([2147263](https://github.com/mruby/mruby/commit/2147263)) +- Find pattern matching (`[*pre, target, *post]`) ([6c4d98b](https://github.com/mruby/mruby/commit/6c4d98b)) +- Pin operator (`^variable`) ([1de6340](https://github.com/mruby/mruby/commit/1de6340)) +- Guard clauses (`if`/`unless` conditions) ([07ac110](https://github.com/mruby/mruby/commit/07ac110)) +- One-line pattern matching (`expr in pattern`) ([e76ce24](https://github.com/mruby/mruby/commit/e76ce24)) +- Brace-less hash pattern support ([e8096bf](https://github.com/mruby/mruby/commit/e8096bf)) + +## Other Language Changes + +- `&nil` in formal parameters to explicitly opt out of block arguments ([b07518e](https://github.com/mruby/mruby/commit/b07518e)) +- Trailing comma in method definition parameters: `def foo(a, b,)` ([f78334b](https://github.com/mruby/mruby/commit/f78334b)) +- Array/Hash/String subclasses can now override `[]` and `[]=` methods ([#6675](https://github.com/mruby/mruby/pull/6675)) +- `OP_SETIDX` optimization for Array and Hash ([ddd8fe1](https://github.com/mruby/mruby/commit/ddd8fe1)) +- `case`/`in` without `else` now raises `NoMatchingPatternError` ([d8de35b](https://github.com/mruby/mruby/commit/d8de35b)) +- Allow compound statement in parenthesized argument context ([919cbd8](https://github.com/mruby/mruby/commit/919cbd8)) + +# Changes in C API + +- **_NOTE_**: `mrb_alloca()` renamed to `mrb_temp_alloc()` ([7fe5c2e](https://github.com/mruby/mruby/commit/7fe5c2e)) +- **_NOTE_**: `mruby/ext/io.h` renamed to `mruby/io.h` ([2813f79](https://github.com/mruby/mruby/commit/2813f79)) +- `mrb_gc_add_region()` for contiguous heap region support ([072855a](https://github.com/mruby/mruby/commit/072855a)) +- `mrb_class_outer()` to get the outer class/module ([3a1b771](https://github.com/mruby/mruby/commit/3a1b771)) +- `MRB_ENSURE()` macro for exception-safe cleanup ([3ac682b](https://github.com/mruby/mruby/commit/3ac682b)) +- `mrb_time_get_tm()` for accessing struct tm ([daaaafe](https://github.com/mruby/mruby/commit/daaaafe)) +- `MRB_OPEN_FAILURE()` macro for checking mrb_open result ([40b0cb9](https://github.com/mruby/mruby/commit/40b0cb9)) +- `mrb_print_error()` now handles NULL gracefully ([8e50a45](https://github.com/mruby/mruby/commit/8e50a45)) +- `mrb_open()` returns mrb_state with exc set on init failure ([05ffe0c](https://github.com/mruby/mruby/commit/05ffe0c)) +- `mrb_utf8_to_buf()` for UTF-8 encoding consolidation ([7e28e68](https://github.com/mruby/mruby/commit/7e28e68)) +- `kh_is_end()` macro for safe khash iteration ([893cc75](https://github.com/mruby/mruby/commit/893cc75)) +- `mrb_bigint_p()` always defined regardless of bigint gem presence ([6c4a8c0](https://github.com/mruby/mruby/commit/6c4a8c0)) +- `RInteger` and `RFloat` added to `RVALUE` union ([13dbca0](https://github.com/mruby/mruby/commit/13dbca0)) + +# ROM Method Tables + +All built-in classes and most extension gems now use read-only method +tables stored in `.rodata` instead of heap-allocated hash tables. Method +definitions no longer consume heap memory, significantly reducing memory +footprint for embedded use. + +Core classes converted: BasicObject, Object, Module, Class, Kernel, +String, Array, Hash, Numeric, Integer, Float, NilClass, TrueClass, +FalseClass, Range, Symbol, Exception, Proc. + +Extension gems converted: mruby-string-ext, mruby-array-ext, mruby-set, +mruby-struct, mruby-class-ext, mruby-numeric-ext, mruby-random, +mruby-kernel-ext, mruby-complex, mruby-rational, mruby-io, mruby-socket, +mruby-method, mruby-metaprog, mruby-time, mruby-hash-ext, mruby-proc-ext, +mruby-symbol-ext, mruby-range-ext, mruby-object-ext. + +# GC and Memory + +- **_NOTE_**: `MRB_NO_PRESYM` removed; presym is now always enabled ([81689045](https://github.com/mruby/mruby/commit/81689045)) +- Replace `gcnext` gray linked list with fixed-size gray stack, reducing per-object overhead ([31fea170](https://github.com/mruby/mruby/commit/31fea170)) +- `mrb_gc_add_region()` for providing contiguous memory buffers as GC heap pages ([072855a](https://github.com/mruby/mruby/commit/072855a)) +- Chunk-based pool for symbol string allocation ([e05bd8f](https://github.com/mruby/mruby/commit/e05bd8f)) +- Reduce `IV_INITIAL_SIZE` from 4 to 2 ([6bd1f51](https://github.com/mruby/mruby/commit/6bd1f51)) +- Lossless float encoding using rotation in word boxing ([b6148c8](https://github.com/mruby/mruby/commit/b6148c8)) +- Lossless rotation encoding for 32-bit float32 word boxing ([14a5cfb](https://github.com/mruby/mruby/commit/14a5cfb)) +- Consolidated irep allocation for .mrb loading ([74fb045](https://github.com/mruby/mruby/commit/74fb045)) +- Object shapes (hidden classes) for `MRB_TT_OBJECT` IV storage, sharing key layouts across objects with the same instance variable assignment order ([8d10056](https://github.com/mruby/mruby/commit/8d10056)) + +# Build & Configuration + +- **_NOTE_**: `MRB_WORDBOX_NO_FLOAT_TRUNCATE` renamed to `MRB_WORDBOX_NO_INLINE_FLOAT` (old name still works) ([59e1fe2](https://github.com/mruby/mruby/commit/59e1fe2)) +- **_NOTE_**: `MRB_INT64` on 32-bit now requires `MRB_NO_BOXING` (other boxing modes cannot guarantee alignment for heap-allocated 64-bit integers) ([eaaa66b](https://github.com/mruby/mruby/commit/eaaa66b)) +- Amalgamation support via `rake amalgam` task ([d995ca2](https://github.com/mruby/mruby/commit/d995ca2)) +- New Platform: Cosmopolitan Libc ([#6681](https://github.com/mruby/mruby/pull/6681)) +- Emscripten: use native WASM exception handling ([ca364e3](https://github.com/mruby/mruby/commit/ca364e3)) +- HAL (Hardware Abstraction Layer) for platform abstraction in mruby-io, mruby-socket, mruby-dir, mruby-task ([74ca22f](https://github.com/mruby/mruby/commit/74ca22f)) +- `MRUBY_MIRB_READLINE` environment variable to control readline library selection ([0aafb83](https://github.com/mruby/mruby/commit/0aafb83)) +- MSYS2 drive letter support in build script ([77f6ffe](https://github.com/mruby/mruby/commit/77f6ffe)) +- Inter-gem headers separated from external API headers ([#6671](https://github.com/mruby/mruby/pull/6671)) + +# Changes in mrbgems + +## New Gems + +- **mruby-task**: Cooperative multitasking with preemptive scheduling ([ae0d7a0](https://github.com/mruby/mruby/commit/ae0d7a0)) +- **mruby-benchmark**: Benchmarking gem ([2f40f3d](https://github.com/mruby/mruby/commit/2f40f3d)) +- **mruby-strftime**: Time#strftime implementation ([b31e22f](https://github.com/mruby/mruby/commit/b31e22f)) + +## mruby-bin-mirb Improvements + +- Custom multi-line editor replacing readline ([527018c](https://github.com/mruby/mruby/commit/527018c)) +- Syntax highlighting for keywords, strings, result values, hash key symbols ([624272b](https://github.com/mruby/mruby/commit/624272b), [1713d4a](https://github.com/mruby/mruby/commit/1713d4a)) +- Automatic light/dark theme detection via OSC 11 ([db4c8d9](https://github.com/mruby/mruby/commit/db4c8d9)) +- Tab completion support ([2f15282](https://github.com/mruby/mruby/commit/2f15282)) +- Colored output for prompts and errors ([b36e0b4](https://github.com/mruby/mruby/commit/b36e0b4)) +- Auto-indentation and auto-dedent ([d52f318](https://github.com/mruby/mruby/commit/d52f318), [e901b6d](https://github.com/mruby/mruby/commit/e901b6d)) +- Command history with Up/Down navigation ([5f85c1b](https://github.com/mruby/mruby/commit/5f85c1b)) +- Line numbers in multi-line prompts ([5a3f0e2](https://github.com/mruby/mruby/commit/5a3f0e2)) +- UTF-8 multibyte character support ([4a97da3](https://github.com/mruby/mruby/commit/4a97da3)) + +## mruby-bigint Improvements + +- Toom-3 multiplication for large numbers ([99620804](https://github.com/mruby/mruby/commit/99620804)) +- Karatsuba multiplication for medium-sized numbers ([85e81072](https://github.com/mruby/mruby/commit/85e81072)) +- Balance multiplication for asymmetric operands ([0220ec2b](https://github.com/mruby/mruby/commit/0220ec2b)) +- Divide-and-conquer optimization for `to_s` ([990ff90f](https://github.com/mruby/mruby/commit/990ff90f)) +- Consolidated mpn layer for low-level limb operations ([9ef3362f](https://github.com/mruby/mruby/commit/9ef3362f)) +- Always use 32-bit limbs by default ([c747c77f](https://github.com/mruby/mruby/commit/c747c77f)) + +## Other Gem Changes + +- **_NOTE_**: `Hash#deconstruct_keys` removed for CRuby compatibility ([34b9412](https://github.com/mruby/mruby/commit/34b9412)) +- **mruby-enum-lazy**: Fix `Lazy#flat_map` to handle non-enumerable block return values ([#6765](https://github.com/mruby/mruby/pull/6765)) +- **mruby-array-ext**: Add `Array#find` and `Array#rfind` methods +- **mruby-io**: Add `IO#putc` and `Kernel#putc` ([baff6e6](https://github.com/mruby/mruby/commit/baff6e6)) +- **mruby-random**: Replace xoshiro with PCG for better memory efficiency ([f1bab01](https://github.com/mruby/mruby/commit/f1bab01)) +- **mruby-compiler**: Variable-sized AST nodes for reduced memory usage +- **mruby-compiler**: `no_return_value` context flag for script optimization ([613b03a](https://github.com/mruby/mruby/commit/613b03a)) +- `initialize_copy` and `respond_to_missing?` defined as private ([#6708](https://github.com/mruby/mruby/pull/6708)) +- Struct keyword argument initialization ([#6574](https://github.com/mruby/mruby/pull/6574)) + +# Compiler Improvements + +- Variable-sized AST nodes for reduced memory consumption ([821b989](https://github.com/mruby/mruby/commit/821b989)) +- Pattern matching bytecode optimizations ([21d4135](https://github.com/mruby/mruby/commit/21d4135)) +- Optimized masgn to generate literals directly into target registers ([fb5d966](https://github.com/mruby/mruby/commit/fb5d966)) +- Optimized splat of literal arrays in args/literals ([1cb8d73](https://github.com/mruby/mruby/commit/1cb8d73)) +- Early termination after too many parse errors ([510ebd7](https://github.com/mruby/mruby/commit/510ebd7)) +- Chunk array literals at 64 elements to reduce register pressure ([f98d641](https://github.com/mruby/mruby/commit/f98d641)) +- Chunk `%w()` and `%i()` literals to reduce register pressure ([62cf0dc](https://github.com/mruby/mruby/commit/62cf0dc)) + +# VM Optimizations + +New super-instructions that fuse common opcode sequences to reduce bytecode size and improve performance: + +- `OP_SEND0`/`OP_SSEND0`: Zero-argument method call, avoiding argument count setup ([9123ef4](https://github.com/mruby/mruby/commit/9123ef4)) +- `OP_TDEF`/`OP_SDEF`: Fused method definition combining TCLASS/SCLASS+METHOD+DEF into single instruction, saving 4 bytes per method ([8d4f47e](https://github.com/mruby/mruby/commit/8d4f47e)) +- `OP_GETIDX0`: Fast path for `array[0]` and `Array#first` access ([680f7ec](https://github.com/mruby/mruby/commit/680f7ec)) +- `OP_ADDILV`/`OP_SUBILV`: Local variable increment/decrement fusion for `i += n` patterns ([43f64b9](https://github.com/mruby/mruby/commit/43f64b9)) +- `OP_RETSELF`: Single-byte instruction for `return self` pattern ([a71db8c](https://github.com/mruby/mruby/commit/a71db8c)) +- `OP_RETNIL`: Single-byte instruction for `return nil` pattern ([64e30bf](https://github.com/mruby/mruby/commit/64e30bf)) +- `OP_RETTRUE`/`OP_RETFALSE`: Single-byte instructions for `return true`/`return false` patterns ([0b15727](https://github.com/mruby/mruby/commit/0b15727)) +- `OP_MATCHERR`: Pattern matching error with conditional execution ([944168a](https://github.com/mruby/mruby/commit/944168a)) +- `OP_BLKCALL`: Direct block call for `yield`, bypassing method dispatch (13-17% faster) ([3aa2872](https://github.com/mruby/mruby/commit/3aa2872)) + +Other optimizations: + +- 1.5x stack growth instead of linear growth for reduced reallocations ([f7988c93](https://github.com/mruby/mruby/commit/f7988c93)) +- Skip keyword argument hash duplication ([5970e350](https://github.com/mruby/mruby/commit/5970e350)) + +# Fixed GitHub Issues + +- [#5531](https://github.com/mruby/mruby/issues/5531) Hash recursion detection +- [#6506](https://github.com/mruby/mruby/issues/6506) Constant lookup in singleton class +- [#6507](https://github.com/mruby/mruby/issues/6507) tally multi-values +- [#6508](https://github.com/mruby/mruby/issues/6508) Enumerable#sum index +- [#6509](https://github.com/mruby/mruby/issues/6509) scope_new nregs initialization +- [#6515](https://github.com/mruby/mruby/issues/6515) y.tab.c in repository +- [#6516](https://github.com/mruby/mruby/issues/6516) Private backquote +- [#6554](https://github.com/mruby/mruby/issues/6554) Socket private #initialize +- [#6570](https://github.com/mruby/mruby/issues/6570) instance_eval crash +- [#6613](https://github.com/mruby/mruby/issues/6613) const_added hook during bootstrapping +- [#6635](https://github.com/mruby/mruby/issues/6635), [#6636](https://github.com/mruby/mruby/issues/6636) Colon3 constant lookup +- [#6637](https://github.com/mruby/mruby/issues/6637) arm64 mingw64 builtin setjmp/longjmp +- [#6642](https://github.com/mruby/mruby/issues/6642) Task segfault when sleep called from C +- [#6645](https://github.com/mruby/mruby/issues/6645) Set memory leak from double initialization +- [#6646](https://github.com/mruby/mruby/issues/6646) IO#gets negative length +- [#6647](https://github.com/mruby/mruby/issues/6647) IO#ungetc buffer overflow +- [#6648](https://github.com/mruby/mruby/issues/6648) sprintf buffer overread +- [#6649](https://github.com/mruby/mruby/issues/6649) Array#sort! use-after-realloc +- [#6650](https://github.com/mruby/mruby/issues/6650) Array#fill validation +- [#6652](https://github.com/mruby/mruby/issues/6652) Array comparison use-after-realloc +- [#6657](https://github.com/mruby/mruby/issues/6657) Exception handling for ||= on class variables +- [#6659](https://github.com/mruby/mruby/issues/6659) Super with keyword arguments +- [#6660](https://github.com/mruby/mruby/issues/6660) Regression on struct/array/hash == override with super +- [#6662](https://github.com/mruby/mruby/issues/6662) Array set operations use-after-free +- [#6664](https://github.com/mruby/mruby/issues/6664) Set#flatten memory leak +- [#6666](https://github.com/mruby/mruby/issues/6666) Regexp literal with encoding +- [#6668](https://github.com/mruby/mruby/issues/6668) Method#== for aliased methods and comparison bug +- [#6671](https://github.com/mruby/mruby/issues/6671) Separate inter-gem headers from external API headers +- [#6674](https://github.com/mruby/mruby/issues/6674) Document pattern matching limitations +- [#6675](https://github.com/mruby/mruby/issues/6675) Allow Hash#[] to be aliased again +- [#6687](https://github.com/mruby/mruby/issues/6687) Expand MRB_SYM/MRB_GVSYM support for symbols with special characters +- [#6698](https://github.com/mruby/mruby/issues/6698) Bigint tests fail on architectures other than x86_64 and i386 +- [#6701](https://github.com/mruby/mruby/issues/6701) Heap-use-after-free in mrb_vm_exec involving mruby-rational / mruby-bigint +- [#6702](https://github.com/mruby/mruby/issues/6702) mruby-bigint doesn't compile in C++ project +- [#6704](https://github.com/mruby/mruby/issues/6704) Heap-buffer-overflow in mrb_vm_exec via malformed source code +- [#6705](https://github.com/mruby/mruby/issues/6705) Can't get outer class of an object in C +- [#6713](https://github.com/mruby/mruby/issues/6713) mruby-polarssl not work +- [#6720](https://github.com/mruby/mruby/issues/6720) Random float range: different behavior from CRuby +- [#6722](https://github.com/mruby/mruby/issues/6722) RBreak size overflow on 32-bit platforms with MRB_NO_BOXING +- [#6740](https://github.com/mruby/mruby/issues/6740) `%w()`/`%i()` register pressure with large literals +- [#6741](https://github.com/mruby/mruby/issues/6741) `case`/`in` without `else` should raise `NoMatchingPatternError` +- [#6760](https://github.com/mruby/mruby/issues/6760) `mrb_gc_unregister()` not removing all matching entries + +# Merged Pull Requests + +- [#6418](https://github.com/mruby/mruby/pull/6418) Add `ls-lint` with GitHub Actions +- [#6492](https://github.com/mruby/mruby/pull/6492) fix a typo, update specs +- [#6493](https://github.com/mruby/mruby/pull/6493) Fix TYPO in memory.md +- [#6495](https://github.com/mruby/mruby/pull/6495) Remove `MRB_ENDIAN_LOHI()` that is no longer in use +- [#6497](https://github.com/mruby/mruby/pull/6497) gha: update `build.yml` try `windows-2025` image +- [#6498](https://github.com/mruby/mruby/pull/6498) Clean up and standardize the pre-commit config +- [#6501](https://github.com/mruby/mruby/pull/6501) Update pre-commit Node.js version to `v22.14.0 LTS` +- [#6502](https://github.com/mruby/mruby/pull/6502) pre-commit: update prettier to the latest version +- [#6503](https://github.com/mruby/mruby/pull/6503) misc: fix typos +- [#6505](https://github.com/mruby/mruby/pull/6505) mrbgems: fix spelling +- [#6510](https://github.com/mruby/mruby/pull/6510) Fixed class method visibility via `module_function` +- [#6511](https://github.com/mruby/mruby/pull/6511) Exclude the external project "lrama" from pre-commit +- [#6513](https://github.com/mruby/mruby/pull/6513) mruby 3.4.0 released +- [#6517](https://github.com/mruby/mruby/pull/6517) core/codegen.c: remove unneeded duplicate semicolon +- [#6518](https://github.com/mruby/mruby/pull/6518) Change mrbc_args.flags bit width from 2 to 3 +- [#6519](https://github.com/mruby/mruby/pull/6519) Add `tools/lrama` to `.prettierignore` +- [#6520](https://github.com/mruby/mruby/pull/6520) pre-commit: autoupdate and update node LTS version +- [#6521](https://github.com/mruby/mruby/pull/6521) Add codespell config file `.codespellrc` +- [#6522](https://github.com/mruby/mruby/pull/6522) gha: label more files +- [#6523](https://github.com/mruby/mruby/pull/6523) add `rand(Range)` and unify implementations of `Random#rand` and `Kernel#rand` +- [#6524](https://github.com/mruby/mruby/pull/6524) Fix Kernel#p when no argument +- [#6525](https://github.com/mruby/mruby/pull/6525) Skip adding empty input to mirb history +- [#6526](https://github.com/mruby/mruby/pull/6526) Add build config for Luckfox Pico embedded SBC +- [#6528](https://github.com/mruby/mruby/pull/6528) misc: fix spelling +- [#6530](https://github.com/mruby/mruby/pull/6530) Revert "class.c (find_visibility_scope): when callinfo returns, \*ep == NULL; #6512" +- [#6531](https://github.com/mruby/mruby/pull/6531) Improve method table performance by rehashing at 75% load factor +- [#6532](https://github.com/mruby/mruby/pull/6532) Reverted method table optimizations to prioritize memory savings +- [#6533](https://github.com/mruby/mruby/pull/6533) Fix calling `extended` callback +- [#6534](https://github.com/mruby/mruby/pull/6534) Add descriptive comment to mrb_read_float function +- [#6535](https://github.com/mruby/mruby/pull/6535) Added descriptive comments for functions/macros in src/mempool.c +- [#6536](https://github.com/mruby/mruby/pull/6536) Add descriptive comments to public functions in src/debug.c +- [#6537](https://github.com/mruby/mruby/pull/6537) Updated comments in `cdump.c` to remove the `@brief` tag +- [#6539](https://github.com/mruby/mruby/pull/6539) Add descriptive comments for functions in src/load.c +- [#6540](https://github.com/mruby/mruby/pull/6540) Add descriptive comments to MRB_API functions in object.c +- [#6541](https://github.com/mruby/mruby/pull/6541) Add descriptive comments for MRB_API functions in src/array.c +- [#6542](https://github.com/mruby/mruby/pull/6542) Add descriptive comments to MRB_API functions in src/symbol.c +- [#6543](https://github.com/mruby/mruby/pull/6543) Add descriptive comments to several functions in src/dump.c +- [#6544](https://github.com/mruby/mruby/pull/6544) Fix build strings that must be mutable +- [#6545](https://github.com/mruby/mruby/pull/6545) Add descriptive comments for MRB_API functions in src/class.c +- [#6548](https://github.com/mruby/mruby/pull/6548) Add descriptive comments to MRB_API functions in src/etc.c +- [#6549](https://github.com/mruby/mruby/pull/6549) Add descriptive comments to kernel functions +- [#6550](https://github.com/mruby/mruby/pull/6550) Add descriptive comments for MRB_API functions in src/proc.c +- [#6551](https://github.com/mruby/mruby/pull/6551) Add descriptive comments for MRB_API functions in src/state.c +- [#6552](https://github.com/mruby/mruby/pull/6552) Fix: Correct placement of comments in src/variable.c +- [#6553](https://github.com/mruby/mruby/pull/6553) Add descriptive comments for MRB_API functions in src/vm.c +- [#6555](https://github.com/mruby/mruby/pull/6555) `mrb_mt_foreach()` needs to update the pointer at each loop +- [#6556](https://github.com/mruby/mruby/pull/6556) `iv_foreach()` needs to update the pointer at each loop +- [#6560](https://github.com/mruby/mruby/pull/6560) Refactor: Improve Set GC marking and freeing +- [#6561](https://github.com/mruby/mruby/pull/6561) pre-commit updates and fix prettier entrypoint +- [#6562](https://github.com/mruby/mruby/pull/6562) misc: fix spelling word case +- [#6563](https://github.com/mruby/mruby/pull/6563) pre-commit add rubocop with one rule spaces for indentation +- [#6564](https://github.com/mruby/mruby/pull/6564) Remove jumanjihouse pre-commit hooks no longer maintained +- [#6565](https://github.com/mruby/mruby/pull/6565) Rubocop: fix target Ruby version; add two more cops; fix lint error +- [#6566](https://github.com/mruby/mruby/pull/6566) Removed unreferenced variables in `CrossBuild#run_bintest` +- [#6567](https://github.com/mruby/mruby/pull/6567) Avoid array object creation in `cmd_bin` method in bintest +- [#6568](https://github.com/mruby/mruby/pull/6568) mruby-bin-debugger depends on mruby-bin-mrbc in bintest +- [#6569](https://github.com/mruby/mruby/pull/6569) sed s/Mruby/MRuby/g +- [#6571](https://github.com/mruby/mruby/pull/6571) Update limitations.md to add behavior on small hash +- [#6572](https://github.com/mruby/mruby/pull/6572) Add Claude Code GitHub Workflow +- [#6573](https://github.com/mruby/mruby/pull/6573) pre-commit fixes and updates +- [#6574](https://github.com/mruby/mruby/pull/6574) Support initializing structs via keyword arguments +- [#6575](https://github.com/mruby/mruby/pull/6575) Fix typo in file time methods +- [#6581](https://github.com/mruby/mruby/pull/6581) Merge `mrb_obj_iv_inspect()` into `mrb_obj_inspect()` +- [#6582](https://github.com/mruby/mruby/pull/6582) Stricter type tag in `mrb_obj_alloc()` +- [#6583](https://github.com/mruby/mruby/pull/6583) Add fallback to local build_config.rb before using default configuration +- [#6585](https://github.com/mruby/mruby/pull/6585) Fix typo in mruby3.2 docs +- [#6586](https://github.com/mruby/mruby/pull/6586) Makefile: refactor add docs and add command line `help` target +- [#6587](https://github.com/mruby/mruby/pull/6587) Add Set#hash tests +- [#6588](https://github.com/mruby/mruby/pull/6588) Add CodeQL Analysis for GitHub Actions +- [#6589](https://github.com/mruby/mruby/pull/6589) Add pre-commit hook `check-zip-file-is-not-committed` +- [#6591](https://github.com/mruby/mruby/pull/6591) mruby-eval fix license link in README +- [#6593](https://github.com/mruby/mruby/pull/6593) README: Add Contributors Avatars, Star History, Table of Contents +- [#6598](https://github.com/mruby/mruby/pull/6598) Fix heap buffer overflow in `#method_missing` +- [#6599](https://github.com/mruby/mruby/pull/6599) pre-commit: run `markdown-link-check`, `oxipng`, `prettier` manually +- [#6600](https://github.com/mruby/mruby/pull/6600) `dreamcast_shelf build config`: update to use KallistiOS wrappers +- [#6601](https://github.com/mruby/mruby/pull/6601) fix: skip local build_config.rb when working in MRUBY_ROOT +- [#6602](https://github.com/mruby/mruby/pull/6602) Improved iseq annotations for `new` and `!=` +- [#6604](https://github.com/mruby/mruby/pull/6604) pre-commit config updates +- [#6607](https://github.com/mruby/mruby/pull/6607) fix bigint on raspberry pi +- [#6610](https://github.com/mruby/mruby/pull/6610) Extract golden ratio prime into constant +- [#6614](https://github.com/mruby/mruby/pull/6614) Fix uninitialized variable in io_gets causing segmentation fault +- [#6617](https://github.com/mruby/mruby/pull/6617) Fix various minor problems and speed up build +- [#6618](https://github.com/mruby/mruby/pull/6618) Stop generating unnecessary C++ files in mruby-bin-mruby +- [#6621](https://github.com/mruby/mruby/pull/6621) Set up all GEMS before mruby core tasks definition +- [#6624](https://github.com/mruby/mruby/pull/6624) Fixed wrong `MRuby::Build.current` at the top level of `mrbgem.rake` +- [#6628](https://github.com/mruby/mruby/pull/6628) Revert `File.absolute_path` logic +- [#6629](https://github.com/mruby/mruby/pull/6629) pre-commit update +- [#6631](https://github.com/mruby/mruby/pull/6631) Revert "Rakefile: make the whole thing parallel unless SERIAL=1" +- [#6633](https://github.com/mruby/mruby/pull/6633) Fix a heap-buffer-overflow in str strip! methods +- [#6643](https://github.com/mruby/mruby/pull/6643) Fix crash caused by an incorrect node type check in `codegen_masgn` +- [#6651](https://github.com/mruby/mruby/pull/6651) Address stack-use-after-return in the mruby bigint implementation +- [#6653](https://github.com/mruby/mruby/pull/6653) Improve HAL-related components for MinGW +- [#6655](https://github.com/mruby/mruby/pull/6655) Preventing Memory Leaks in `Array#__combination_init` +- [#6656](https://github.com/mruby/mruby/pull/6656) Fix integer overflow in allocation size calculation +- [#6663](https://github.com/mruby/mruby/pull/6663) Added the `kh_is_end()` macro function +- [#6665](https://github.com/mruby/mruby/pull/6665) Fixed use-after-free with `Set#join` +- [#6670](https://github.com/mruby/mruby/pull/6670) Arranging VM dispatch macros +- [#6673](https://github.com/mruby/mruby/pull/6673) Adjust broken license links; clean up Markdown +- [#6677](https://github.com/mruby/mruby/pull/6677) gha: run pre-commit with `--color=always` +- [#6678](https://github.com/mruby/mruby/pull/6678) Put ls-lint and pre-commit in separate workflow files +- [#6679](https://github.com/mruby/mruby/pull/6679) pre-commit autoupdate; update node and prettier +- [#6681](https://github.com/mruby/mruby/pull/6681) Add Cosmopolitan Libc build configuration +- [#6689](https://github.com/mruby/mruby/pull/6689) docs: fix pre-commit manual hooks; fix link +- [#6694](https://github.com/mruby/mruby/pull/6694) Fix mirb build under Cosmopolitan +- [#6695](https://github.com/mruby/mruby/pull/6695) Dependabot: add a cooldown period for new releases +- [#6696](https://github.com/mruby/mruby/pull/6696) Fix parse error with required kwargs and omitted parens +- [#6699](https://github.com/mruby/mruby/pull/6699) Fix mruby-task for PicoRuby Integration +- [#6700](https://github.com/mruby/mruby/pull/6700) Fix float/double pack/unpack on s390x +- [#6706](https://github.com/mruby/mruby/pull/6706) Refactor task class to use symbol IDs +- [#6708](https://github.com/mruby/mruby/pull/6708) `initialize_copy` and `respond_to_missing?` defined as private +- [#6709](https://github.com/mruby/mruby/pull/6709) Add the `MRB_ENSURE()` macro +- [#6711](https://github.com/mruby/mruby/pull/6711) Fix out of bounds read and write in IO.select +- [#6714](https://github.com/mruby/mruby/pull/6714) Fix OP_DEBUG operand type and add NULL check for debug_op_hook +- [#6716](https://github.com/mruby/mruby/pull/6716) Fixes identity for proc object +- [#6717](https://github.com/mruby/mruby/pull/6717) Fix mruby-task: wrapping by critical section and setting initial task receiver +- [#6718](https://github.com/mruby/mruby/pull/6718) Add installation instructions for conda and Homebrew +- [#6723](https://github.com/mruby/mruby/pull/6723) Add `RInteger` and `RFloat` to `RVALUE` +- [#6727](https://github.com/mruby/mruby/pull/6727) Language documentation: update wording of "overloading" section +- [#6729](https://github.com/mruby/mruby/pull/6729) Simplifying dependency addition for gensym task +- [#6730](https://github.com/mruby/mruby/pull/6730) Simplifying presym file generation actions +- [#6733](https://github.com/mruby/mruby/pull/6733) Include `mruby/presym.h` for all source files +- [#6734](https://github.com/mruby/mruby/pull/6734) Chunk array literals at 64 elements to reduce register pressure +- [#6735](https://github.com/mruby/mruby/pull/6735) Prevent full recompilation without changes to presym file +- [#6739](https://github.com/mruby/mruby/pull/6739) Fix MSYS2 build error with drive letters +- [#6743](https://github.com/mruby/mruby/pull/6743) Chunk `%w()` and `%i()` literals to reduce register pressure +- [#6744](https://github.com/mruby/mruby/pull/6744) Raise `NoMatchingPatternError` in `case`/`in` without `else` +- [#6747](https://github.com/mruby/mruby/pull/6747) Correctly handle empty hash as default named argument +- [#6749](https://github.com/mruby/mruby/pull/6749) Fix microcontroller profile +- [#6750](https://github.com/mruby/mruby/pull/6750) Fix out-of-bounds read and divide-by-zero in `Array#product` +- [#6752](https://github.com/mruby/mruby/pull/6752) Fix `attr_reader`-generated methods accepting extra arguments +- [#6753](https://github.com/mruby/mruby/pull/6753) Further optimize `Array#product` +- [#6754](https://github.com/mruby/mruby/pull/6754) Mark `attr_reader` procs as noarg +- [#6755](https://github.com/mruby/mruby/pull/6755) Reload `ci` after `mrb_hash_delete_key()` in keyword argument handling +- [#6756](https://github.com/mruby/mruby/pull/6756) Avoid impact of object modifications caused by `mrb_vm_exec()` calls +- [#6758](https://github.com/mruby/mruby/pull/6758) Don't assign result of `mrb_funcall()` directly to `regs` +- [#6759](https://github.com/mruby/mruby/pull/6759) Define `mrb_bigint_p()` always +- [#6761](https://github.com/mruby/mruby/pull/6761) Fix `mrb_gc_unregister()` to remove all matching entries +- [#6762](https://github.com/mruby/mruby/pull/6762) Write generated test C files atomically to avoid build race condition +- [#6765](https://github.com/mruby/mruby/pull/6765) Fix `Lazy#flat_map` to handle non-enumerable block return values +- [#6767](https://github.com/mruby/mruby/pull/6767) Allow compound statement in parenthesized argument context +- [#6780](https://github.com/mruby/mruby/pull/6780) Fix `String#prepend` with self-referencing arguments +- [#6781](https://github.com/mruby/mruby/pull/6781) Protect `sprintf` format string from mutation during callbacks +- [#6783](https://github.com/mruby/mruby/pull/6783) Pin GitHub Actions workflows to commit hashes + +# Security Fixes + +- Buffer overflow in bigint uadd ([3f2611e](https://github.com/mruby/mruby/commit/3f2611e)) +- Stack buffer overflow in Montgomery reduction ([edce0a3](https://github.com/mruby/mruby/commit/edce0a3)) +- Buffer overflow in pack_uu encoding ([2993302](https://github.com/mruby/mruby/commit/2993302)) +- Buffer overflow in IO#ungetc ([01ab2ff](https://github.com/mruby/mruby/commit/01ab2ff)) +- Heap-buffer-overflow in pattern alternation codegen ([eea9e30](https://github.com/mruby/mruby/commit/eea9e30)) +- Out of bounds read and write in IO.select ([44831711](https://github.com/mruby/mruby/commit/44831711)) +- Off-by-one in bounds check for symbol names and pool strings in load.c ([b3b8c01](https://github.com/mruby/mruby/commit/b3b8c01)) +- Use-after-free in Set operations ([a6b55e7](https://github.com/mruby/mruby/commit/a6b55e7)) +- Use-after-free in Array set operations ([729b84c](https://github.com/mruby/mruby/commit/729b84c)) +- Use-after-free in Set#join ([0e653eb](https://github.com/mruby/mruby/commit/0e653eb)) +- Use-after-realloc in Array#sort! ([eb39897](https://github.com/mruby/mruby/commit/eb39897)) +- Heap-use-after-free in insertion_sort ([099d2c47](https://github.com/mruby/mruby/commit/099d2c47)) +- Integer overflow in str_check_length ([6afff1c3](https://github.com/mruby/mruby/commit/6afff1c3)) +- Integer overflow in Integer#lcm ([070bef24](https://github.com/mruby/mruby/commit/070bef24)) +- Heap buffer overflow in `#method_missing` ([550d10a](https://github.com/mruby/mruby/commit/550d10a)) +- Out-of-bounds read and divide-by-zero in `Array#product` ([8441eaf](https://github.com/mruby/mruby/commit/8441eaf)) +- Heap buffer overflow in `String#prepend` with self-referencing arguments ([18ba026](https://github.com/mruby/mruby/commit/18ba026)) +- Use-after-free in `sprintf` via `to_s` callback mutating format string ([48fc422](https://github.com/mruby/mruby/commit/48fc422)) +- Multiple memory leak fixes in bigint, Set, Array, and Task gems |