another bug fix like the one in a7cf8d0f5e

thanks to Alexander D. Knauth for spotting this!
2015-04-25 18:18:16 -05:00 · 2015-04-25 18:18:16 -05:00 · 5a4e791826
commit 5a4e791826
parent a7cf8d0f5e
1 changed files with 1 additions and 1 deletions
--- a/scribble-lib/scribble/blueboxes.rkt
+++ b/scribble-lib/scribble/blueboxes.rkt
@ -55,7 +55,7 @@
    (check-and-update-bluebox-info! ent)
    (match ent
      [(bluebox-info blueboxes.rktd offset tag-ht _)
-       (define offset+lens (hash-ref tag-ht tag #f))
+       (define offset+lens (and tag-ht (hash-ref tag-ht tag #f)))
       (cond
         [offset+lens
          (define lines