diff options
| -rw-r--r-- | src/buildtool/build_engine/expression/evaluator.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/buildtool/build_engine/expression/evaluator.cpp b/src/buildtool/build_engine/expression/evaluator.cpp index 24a12fce..6aeea591 100644 --- a/src/buildtool/build_engine/expression/evaluator.cpp +++ b/src/buildtool/build_engine/expression/evaluator.cpp @@ -271,7 +271,12 @@ auto Union(Expression::list_t const& dicts, size_t from, size_t to) return Expression::kEmptyMap; } if (to == from + 1) { - return dicts[from]; + auto const& entry = dicts[from]; + if (not entry->IsMap()) { + throw Evaluator::EvaluationError{fmt::format( + "Map union list element is not a map: {}", entry->ToString())}; + } + return entry; } size_t mid = from + (to - from) / 2; auto left = Union(dicts, from, mid); |