1 files changed, 7 insertions, 4 deletions
diff --git a/iseq.c b/iseq.c
index 3b87cdcc78..28c2d4f80b 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1477,23 +1477,26 @@ iseqw_s_compile_prism(int argc, VALUE *argv, VALUE self)
 
     pm_parser_t parser;
 
+    pm_string_t input;
     if (RB_TYPE_P(src, T_FILE)) {
         FilePathValue(src);
         file = rb_fstring(src); /* rb_io_t->pathv gets frozen anyways */
 
-        pm_string_t input;
         pm_string_mapped_init(&input, RSTRING_PTR(file));
-
-        pm_parser_init(&parser, pm_string_source(&input), pm_string_length(&input), &options);
     }
     else {
-        pm_parser_init(&parser, (const uint8_t *) RSTRING_PTR(src), RSTRING_LEN(src), &options);
+        input.source = (const uint8_t *)RSTRING_PTR(src);
+        input.length = RSTRING_LEN(src);
+        input.type = PM_STRING_SHARED;
     }
 
+    pm_parser_init(&parser, pm_string_source(&input), pm_string_length(&input), &options);
+
     rb_iseq_t *iseq = iseq_alloc();
     iseqw_s_compile_prism_compile(&parser, opt, iseq, file, path, start_line);
     pm_parser_free(&parser);
     pm_options_free(&options);
+    pm_string_free(&input);
 
     return iseqw_new(iseq);
 }