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Fix double free when an external token is copied

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This commit is contained in:
Max Brunsfeld 2018-06-15 16:18:08 -07:00
parent b14951de9d
commit 75cf95bddc
1 changed files with 11 additions and 0 deletions
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11
src/runtime/subtree.c
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@ -35,6 +35,15 @@ void ts_external_scanner_state_init(ExternalScannerState *self, const char *data
}
}
ExternalScannerState ts_external_scanner_state_copy(const ExternalScannerState *self) {
ExternalScannerState result = *self;
if (self->length > sizeof(self->short_data)) {
result.long_data = ts_malloc(self->length);
memcpy(result.long_data, self->long_data, self->length);
}
return result;
}
void ts_external_scanner_state_delete(ExternalScannerState *self) {
if (self->length > sizeof(self->short_data)) {
ts_free(self->long_data);
@ -182,6 +191,8 @@ Subtree *ts_subtree_new_copy(SubtreePool *pool, const Subtree *self) {
*result = *self;
if (result->children.size > 0) {
ts_subtree_array_copy(self->children, &result->children);
} else if (result->has_external_tokens) {
result->external_scanner_state = ts_external_scanner_state_copy(&self->external_scanner_state);
}
result->ref_count = 1;
return result;