From 2b3128cdb464f6c0398a6c8b5915a5d0fa434674 Mon Sep 17 00:00:00 2001
From: Jay McCarthy <jay@racket-lang.org>
Date: Thu, 8 Dec 2016 15:43:04 -0500
Subject: [PATCH] Protect raco setup from default deps value (see line 638 and
 557)

---
 racket/collects/compiler/cm.rkt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/racket/collects/compiler/cm.rkt b/racket/collects/compiler/cm.rkt
index 150f8a3571..a53d291e88 100644
--- a/racket/collects/compiler/cm.rkt
+++ b/racket/collects/compiler/cm.rkt
@@ -621,7 +621,8 @@
 
 (define (different-source-sha1-and-dep-recorded path deps)
   (define src-hash (get-source-sha1 path))
-  (define recorded-hash (caadr deps))
+  (define recorded-hash (and (pair? (cadr deps))
+                             (caadr deps)))
   (if (equal? src-hash recorded-hash)
       #f
       (list src-hash recorded-hash)))