Using RSTRING_PTR can cause the string object to not exist on the stack,
which could cause it to be GC'd or be moved by GC compaction. This can
cause RSTRING_PTR to point to the incorrect location if the string is
embedded and moved by GC compaction.
Added by peterzhu2118 (Peter Zhu) over 1 year ago
[PRISM] GC guard strings
Using RSTRING_PTR can cause the string object to not exist on the stack,
which could cause it to be GC'd or be moved by GC compaction. This can
cause RSTRING_PTR to point to the incorrect location if the string is
embedded and moved by GC compaction.
Fixes ruby/prism#2442.