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[Bug #18382] Fix crash in compaction for ObjectSpace.trace_object_allocations

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ObjectSpace.trace_object_allocations can crash when auto-compaction is
enabled.
This commit is contained in:
Peter Zhu 2021-12-02 11:16:53 -05:00
parent fbc1615761
commit 9f0c6f20c5
Notes: git 2021-12-03 03:07:05 +09:00 
Merged: https://github.com/ruby/ruby/pull/5202
1 changed files with 2 additions and 1 deletions
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3
ext/objspace/object_tracing.c
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@ -208,7 +208,8 @@ allocation_info_tracer_compact(void *ptr)
{
struct traceobj_arg *trace_arg = (struct traceobj_arg *)ptr;
if (st_foreach_with_replace(trace_arg->object_table, hash_foreach_should_replace_key, hash_replace_key, 0)) {
if (trace_arg->object_table &&
st_foreach_with_replace(trace_arg->object_table, hash_foreach_should_replace_key, hash_replace_key, 0)) {
rb_raise(rb_eRuntimeError, "hash modified during iteration");
}
}