wdt: replace an assert with an ensure

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/wdriver/wdt-simple.rs b/wdriver/wdt-simple.rs
index 12b3f3c4afc0a702048a706cc8cfbdcda3567380..156643de61893c10edb5dca0d4dc4e348247cbd8 100644 (file)
--- a/wdriver/wdt-simple.rs
+++ b/wdriver/wdt-simple.rs
@@ -92,7 +92,7 @@ impl Ctx {
 
     let chk = |w: &WindowGuard<'_>, exp_end| {
       let got_end = w.find_piece(pc)?.posg()?;
-      assert_eq!(got_end, exp_end);
+      ensure_eq!(got_end, exp_end);
       Ok::<_,AE>(())
     };