diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/primops.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 4bf3f5a02707..5ba9830423b0 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -1635,7 +1635,10 @@ static void prim_match(EvalState & state, const Pos & pos, Value * * args, Value const size_t len = match.size() - 1; state.mkList(v, len); for (size_t i = 0; i < len; ++i) { - mkString(*(v.listElems()[i] = state.allocValue()), match[i + 1].str().c_str()); + if (!match[i+1].matched) + mkNull(*(v.listElems()[i] = state.allocValue())); + else + mkString(*(v.listElems()[i] = state.allocValue()), match[i + 1].str().c_str()); } } |