[commit: ghc] master: rts: print incorrect prev_what_next (a094aa7)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/a094aa7dcf92ecb7ddbb82128e279d434f5835ba/ghc

>---------------------------------------------------------------

commit a094aa7dcf92ecb7ddbb82128e279d434f5835ba
Author: Sergei Trofimovich <slyfox at gentoo.org>
Date:   Sat Apr 1 11:58:55 2017 +0100

    rts: print incorrect prev_what_next
    
    Moritz Angermann reports mysterious rts crash:
      A: link: internal error: schedule: invalid what_next field
      A:     (GHC version 8.3.20170321 for arm_none_linux_android)
    
    This change prints actual prev_what_next value.
    
    Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>


>---------------------------------------------------------------

a094aa7dcf92ecb7ddbb82128e279d434f5835ba
 rts/Schedule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rts/Schedule.c b/rts/Schedule.c
index a4d0c1d..b77e7a2 100644
--- a/rts/Schedule.c
+++ b/rts/Schedule.c
@@ -473,7 +473,7 @@ run_thread:
         break;
 
     default:
-        barf("schedule: invalid what_next field");
+        barf("schedule: invalid prev_what_next=%u field", prev_what_next);
     }
 
     cap->in_haskell = false;