handle linref when the argument is an unknown function

2022-06-24 06:31:28 +02:00
parent f51f6240b6
commit 635dc380a3
1 changed files with 2 additions and 0 deletions
--- a/src/runtime/c/pgf/linearizer.cxx
+++ b/src/runtime/c/pgf/linearizer.cxx
@@ -418,6 +418,8 @@ bool PgfLinearizer::TreeLinrefNode::resolve(PgfLinearizer *linearizer)
 {
    TreeNode *root = args;
    ref<PgfConcrLincat> lincat = root->get_lincat(linearizer);
+    if (lincat == 0)
+        return true;

    while (lincat->n_lindefs+lin_index < lincat->res->len) {
        // Unbind all variables