Fix Regexp#inspect for GC compaction #9341
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rb_reg_desc was not safe for GC compaction because it took in the C
string and length but not the backing String object so it get moved
during compaction. This commit changes rb_reg_desc to use the string
from the Regexp object.
The test fails when RGENGC_CHECK_MODE is turned on:
TestRegexp#test_inspect_under_gc_compact_stress [test/ruby/test_regexp.rb:474]:
<"(?-mix:\\/)|"> expected but was
<"/\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00/">.
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rb_reg_desc was not safe for GC compaction because it took in the C string and length but not the backing String object so it get moved during compaction. This commit changes rb_reg_desc to use the string from the Regexp object.
The test fails when RGENGC_CHECK_MODE is turned on: