0001-libexpr-improve-invalid-value-error.patch

From d8c35ce67c0d7933010cb7c83d37e27cea5b2f10 Mon Sep 17 00:00:00 2001
From: ckie <git-525ff67@ckie.dev>
Date: Thu, 30 Dec 2021 20:43:47 +0200
Subject: [PATCH 1/2] libexpr: improve invalid value error

---
 src/libexpr/eval.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index b884b4001..573bb1e33 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -158,6 +158,7 @@ void printValue(std::ostream & str, std::set<const Value *> & active, const Valu
         str << v.fpoint;
         break;
     default:
+        debug(format("invalid value %1%, aborting") % showType(v));
         abort();
     }
 
@@ -197,6 +198,7 @@ string showType(ValueType type)
         case nFloat: return "a float";
         case nThunk: return "a thunk";
     }
+    debug(format("invalid type id %1%, aborting") % type);
     abort();
 }
 
-- 
2.34.1