Add explicit case statements where -Wswitch-enum would report them

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 22337a3ff..a5e9636ae 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -2337,6 +2337,7 @@ bool EvalState::eqValues(Value & v1, Value & v2, const PosIdx pos, std::string_v
         case nFloat:
             return v1.fpoint == v2.fpoint;
 
+        case nThunk: // Must not be left by forceValue
         default:
             error("cannot compare %1% with %2%", showType(v1), showType(v2)).withTrace(pos, errorCtx).debugThrow<EvalError>();
     }