Fixes #718.
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auto v = findAlongAttrPath(state, attrPath, autoArgs, *vRoot);
auto vTmp = findAlongAttrPath(state, attrPath, autoArgs, *vRoot);
state.forceValue(*v);
auto v = state.allocValue(); state.autoCallFunction(autoArgs, *vTmp, *v);
auto v = state.allocValue();
state.autoCallFunction(autoArgs, *vTmp, *v);