diff options
Diffstat (limited to 'src/regex-emacs.c')
| -rw-r--r-- | src/regex-emacs.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/regex-emacs.c b/src/regex-emacs.c index 9cade11c9fb..ba7f3cef64b 100644 --- a/src/regex-emacs.c +++ b/src/regex-emacs.c @@ -3954,9 +3954,11 @@ re_match_2_internal (struct re_pattern_buffer *bufp, /* Prevent shrinking and relocation of buffer text if GC happens while we are inside this function. The calls to - UPDATE_SYNTAX_TABLE_* macros can trigger GC if they call Lisp, - and we have C pointers to buffer text that must not become - invalid as result of GC. */ + UPDATE_SYNTAX_TABLE_* macros can call Lisp (via + `internal--syntax-propertize`); these calls are careful to defend against + buffer modifications, but even with no modifications, the buffer text may + be relocated during GC by `compact_buffer` which would invalidate + our C pointers to buffer text. */ if (!current_buffer->text->inhibit_shrinking) { record_unwind_protect_ptr (unwind_re_match, current_buffer); |