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Fix loophole in error recovery infinite loop guard

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This commit is contained in:
Max Brunsfeld 2018-11-08 12:47:49 -08:00
parent afeee894dc
commit 392e8ea749
1 changed files with 4 additions and 2 deletions
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6
src/runtime/stack.c
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@ -583,14 +583,16 @@ int ts_stack_dynamic_precedence(Stack *self, StackVersion version) {
bool ts_stack_has_advanced_since_error(const Stack *self, StackVersion version) {
const StackHead *head = array_get(&self->heads, version);
const StackNode *node = head->node;
if (node->error_cost == 0) return true;
while (node) {
if (node->link_count > 0) {
Subtree subtree = node->links[0].subtree;
if (subtree.ptr) {
if (ts_subtree_total_bytes(subtree) > 0) {
return true;
} else if (node->node_count > head->node_count_at_last_error) {
} else if (
node->node_count > head->node_count_at_last_error &&
ts_subtree_error_cost(subtree) == 0
) {
node = node->links[0].node;
continue;
}