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-rw-r--r--src/libexpr/eval.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 1ee6c5a7f6aa..f95df5e4d6fb 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -59,6 +59,7 @@ std::ostream & operator << (std::ostream & str, const Value & v)
         str << "]";
         break;
     case tThunk:
+    case tApp:
     case tCopy:
         str << "<CODE>";
         break;