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Merge pull request #3238 from puckipedia/attrset-overrides-dynamic

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Ensure enough space in attrset bindings
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Eelco Dolstra 2019-11-26 20:14:55 +01:00 committed by GitHub
commit 872740cf60
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3 changed files with 6 additions and 1 deletions
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2
src/libexpr/eval.cc
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@ -875,7 +875,7 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
if (hasOverrides) { if (hasOverrides) {
Value * vOverrides = (*v.attrs)[overrides->second.displ].value; Value * vOverrides = (*v.attrs)[overrides->second.displ].value;
state.forceAttrs(*vOverrides); 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) for (auto & i : *v.attrs)
newBnds->push_back(i); newBnds->push_back(i);
for (auto & i : *vOverrides->attrs) { for (auto & i : *vOverrides->attrs) {

1
tests/lang/eval-okay-attrs6.exp Normal file
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@ -0,0 +1 @@
{ __overrides = { bar = "qux"; }; bar = "qux"; foo = "bar"; }

4
tests/lang/eval-okay-attrs6.nix Normal file
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@ -0,0 +1,4 @@
rec {
"${"foo"}" = "bar";
__overrides = { bar = "qux"; };
}