Improve error message

2020-04-02 19:03:32 +02:00
parent ab47868639
commit e1fc9f6690
1 changed files with 1 additions and 1 deletions
@@ -81,7 +81,7 @@ static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, V
        input = lookupInRegistries(state.store, input).first;

    if (evalSettings.pureEval && !input->isImmutable())
-        throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input");
+        throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input, at %s", pos);

    // FIXME: use fetchOrSubstituteTree
    auto [tree, input2] = input->fetchTree(state.store);