From d3b700f98cfd96df3ad7ca018a5e7e3d0ea96429 Mon Sep 17 00:00:00 2001
From: Johannes Altmanninger <aclopte@gmail.com>
Date: Wed, 14 Feb 2024 22:24:39 +0100
Subject: [PATCH] Promote debug-only assertion

---
 src/builtins/string.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/builtins/string.rs b/src/builtins/string.rs
index 994ca4aff..de6262e07 100644
--- a/src/builtins/string.rs
+++ b/src/builtins/string.rs
@@ -262,9 +262,7 @@ fn width_without_escapes(ins: &wstr, start_pos: usize) -> usize {
             pos += 1;
         }
     }
-    // we subtracted less than we added
-    debug_assert!(width >= 0, "line has negative width");
-    return width as usize;
+    usize::try_from(width).expect("line has negative width")
 }
 
 /// Empirically determined.