From 495de53eb379eff3cf998b210f7472619741e037 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 17 Nov 2023 07:30:37 +0200
Subject: Add pre-condition assert to target::newer()

---
 libbuild2/target.ixx | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'libbuild2/target.ixx')

diff --git a/libbuild2/target.ixx b/libbuild2/target.ixx
index 69b2776..39b81e7 100644
--- a/libbuild2/target.ixx
+++ b/libbuild2/target.ixx
@@ -769,6 +769,8 @@ namespace build2
   inline bool mtime_target::
   newer (timestamp mt, target_state s) const
   {
+    assert (s != target_state::unknown); // Should be executed.
+
     timestamp mp (mtime ());
 
     // What do we do if timestamps are equal? This can happen, for example,
-- 
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