Free the original pointer if `realloc` failed.
The POSIX `realloc` keep the original pointer untouched, so it can
easily leads to memory leakage. `mrb_realloc()` should handle those
bookkeeping, while `mrb_realloc_simple()` keeps the original `realloc`
behavior.
MODIFY
src/gc.c
src/gc.c
@@ -225,15 +225,10 @@ mrb_realloc(mrb_state *mrb, void *p, size_t len)
p2 = mrb_realloc_simple(mrb, p, len);
if (len == 0) return p2;
if (p2 == NULL) {
- if (mrb->gc.out_of_memory) {
- mrb_raise_nomemory(mrb);
- /* mrb_panic(mrb); */
- }
- else {
+ mrb_free(mrb, p);
mrb->gc.out_of_memory = TRUE;
mrb_raise_nomemory(mrb);
}
- }
else {
mrb->gc.out_of_memory = FALSE;
}

Free the original pointer if `realloc` failed.

The POSIX `realloc` keep the original pointer untouched, so it can
easily leads to memory leakage. `mrb_realloc()` should handle those
bookkeeping, while `mrb_realloc_simple()` keeps the original `realloc`
behavior.