From c42d1acfeb42febb2815a3b76f24b9fc88d50ba8 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 29 Aug 2016 17:56:35 +0200
Subject: forceBool(): Show position info

---
 src/libexpr/eval.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/libexpr/eval.cc')

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 22396865f095..64f3874db614 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -1378,11 +1378,11 @@ NixFloat EvalState::forceFloat(Value & v, const Pos & pos)
 }
 
 
-bool EvalState::forceBool(Value & v)
+bool EvalState::forceBool(Value & v, const Pos & pos)
 {
     forceValue(v);
     if (v.type != tBool)
-        throwTypeError("value is %1% while a Boolean was expected", v);
+        throwTypeError("value is %1% while a Boolean was expected, at %2%", v, pos);
     return v.boolean;
 }
 
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