patch 9.0.0614: SpellFileMissing autocmd may delete buffer
Problem: SpellFileMissing autocmd may delete buffer.
Solution: Disallow deleting the current buffer to avoid using freed memory.
diff --git a/src/spell.c b/src/spell.c
index 628814f..975b5a6 100644
--- a/src/spell.c
+++ b/src/spell.c
@@ -1568,6 +1568,10 @@
sl.sl_slang = NULL;
sl.sl_nobreak = FALSE;
+ // Disallow deleting the current buffer. Autocommands can do weird things
+ // and cause "lang" to be freed.
+ ++curbuf->b_locked;
+
// We may retry when no spell file is found for the language, an
// autocommand may load it then.
for (round = 1; round <= 2; ++round)
@@ -1621,6 +1625,8 @@
STRCPY(fname_enc + STRLEN(fname_enc) - 3, "add.spl");
do_in_runtimepath(fname_enc, DIP_ALL, spell_load_cb, &sl);
}
+
+ --curbuf->b_locked;
}
/*