Better error message

Also show types when nix cannot compare values of different types.
This is also more consistent since types are already shown when comparing values of the same not comparable type.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index cf2d3d278f28..5a1f47b55e0d 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -248,7 +248,7 @@ struct CompareValues
     bool operator () (const Value * v1, const Value * v2) const
     {
         if (v1->type != v2->type)
-            throw EvalError("cannot compare values of different types");
+            throw EvalError(format("cannot compare %1% with %2%") % showType(*v1) % showType(*v2));
         switch (v1->type) {
             case tInt:
                 return v1->integer < v2->integer;