diff options
Diffstat (limited to 'src/libexpr/nixexpr.cc')
| -rw-r--r-- | src/libexpr/nixexpr.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libexpr/nixexpr.cc b/src/libexpr/nixexpr.cc index 3bcd35fef..c591916e3 100644 --- a/src/libexpr/nixexpr.cc +++ b/src/libexpr/nixexpr.cc @@ -147,7 +147,10 @@ void ExprLambda::show(const SymbolTable & symbols, std::ostream & str) const if (hasFormals()) { str << "{ "; bool first = true; - for (auto & i : formals->formals) { + // the natural Symbol ordering is by creation time, which can lead to the + // same expression being printed in two different ways depending on its + // context. always use lexicographic ordering to avoid this. + for (auto & i : formals->lexicographicOrder(symbols)) { if (first) first = false; else str << ", "; str << symbols[i.name]; if (i.def) { |