[pull] master from ruby:master#904
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pull[bot] merged 4 commits intoturkdevops:masterfrom Apr 2, 2026
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…nstruction (#16634) We have global regalloc now and don't need this manual threading.
pm_parse_process initializes the index_lookup_table but nothing seems to
use it after it has been allocated. However, pm_compile_scope_node will
overwrite the index_lookup_table and cause it to leak memory. This can
be seen during bootup with the following memory leaks reported by ASAN:
#0 0x60dba31b7af3 in malloc
#1 0x60dba32e0718 in rb_gc_impl_malloc gc/default/default.c:8287:5
#2 0x60dba32c7aa7 in ruby_xmalloc_body gc.c:5373:12
#3 0x60dba32c4a54 in ruby_xmalloc gc.c:5355:34
#4 0x60dba3260314 in pm_index_lookup_table_init_heap prism_compile.h:89:29
#5 0x60dba3209388 in pm_parse_process prism_compile.c:11366:5
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