Ensure enough space in attrset bindings when using both __overrides a…

…nd dynamic attributes
NixOS · Nov 25, 2019 · cd55f91 · cd55f91
1 parent d12d69e
commit cd55f91
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
@@ -875,7 +875,7 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
         if (hasOverrides) {
             Value * vOverrides = (*v.attrs)[overrides->second.displ].value;
             state.forceAttrs(*vOverrides);
-            Bindings * newBnds = state.allocBindings(v.attrs->size() + vOverrides->attrs->size());
+            Bindings * newBnds = state.allocBindings(v.attrs->capacity() + vOverrides->attrs->size());
             for (auto & i : *v.attrs)
                 newBnds->push_back(i);
             for (auto & i : *vOverrides->attrs) {