(vhdl-update-progress-info): Avoid divide by zero error.

1 files changed, 7 insertions, 4 deletions

diff --git a/lisp/progmodes/vhdl-mode.el b/lisp/progmodes/vhdl-mode.el
index a1bd32a313d..0d909a4a3ff 100644
--- a/lisp/progmodes/vhdl-mode.el
+++ b/lisp/progmodes/vhdl-mode.el
@@ -6982,10 +6982,13 @@ only-lines."
   (when (and vhdl-progress-info (not noninteractive)
              (< vhdl-progress-interval
                 (- (nth 1 (current-time)) (aref vhdl-progress-info 2))))
-    (message (concat string "... (%2d%s)")
-             (/ (* 100 (- pos (aref vhdl-progress-info 0)))
-                (- (aref vhdl-progress-info 1)
-                   (aref vhdl-progress-info 0))) "%")
+    (let ((delta (- (aref vhdl-progress-info 1)
+                    (aref vhdl-progress-info 0))))
+      (if (= 0 delta)
+          (message (concat string "... (100%s)") "%")
+        (message (concat string "... (%2d%s)")
+                 (/ (* 100 (- pos (aref vhdl-progress-info 0)))
+                    delta) "%")))
     (aset vhdl-progress-info 2 (nth 1 (current-time)))))
 
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