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Avoid leaking copy of potentially-extra token

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This commit is contained in:
Max Brunsfeld 2016-02-02 13:13:32 -08:00
parent 2da716d659
commit 29c77c34ef
1 changed files with 9 additions and 5 deletions
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14
src/runtime/parser.c
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@ -292,13 +292,17 @@ static ParseActionResult ts_parser__shift_extra(TSParser *self, int head,
TSTree *lookahead) {
TSSymbolMetadata metadata = self->language->symbol_metadata[lookahead->symbol];
if (metadata.structural && ts_stack_head_count(self->stack) > 1) {
lookahead = ts_tree_make_copy(lookahead);
if (!lookahead)
TSTree *copy = ts_tree_make_copy(lookahead);
if (!copy)
return FailedToUpdateStackHead;
copy->extra = true;
ParseActionResult result = ts_parser__shift(self, head, state, copy);
ts_tree_release(copy);
return result;
} else {
lookahead->extra = true;
return ts_parser__shift(self, head, state, lookahead);
}
lookahead->extra = true;
return ts_parser__shift(self, head, state, lookahead);
}
static ParseActionResult ts_parser__reduce(TSParser *self, int head,