X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=rts%2Fsm%2FMarkWeak.c;h=d4d708e72c2f4581871a963b46c57a538f4ff5c2;hp=e65c176c0a2027bf2628f042360df276b706a612;hb=83d563cb9ede0ba792836e529b1e2929db926355;hpb=9fa96fc44a640014415e1588f50ab7689285e6cb

diff --git a/rts/sm/MarkWeak.c b/rts/sm/MarkWeak.c
index e65c176..d4d708e 100644
--- a/rts/sm/MarkWeak.c
+++ b/rts/sm/MarkWeak.c
@@ -270,8 +270,10 @@ static rtsBool tidyThreadList (generation *gen)
         
         // if the thread is not masking exceptions but there are
         // pending exceptions on its queue, then something has gone
-        // wrong:
+        // wrong.  However, pending exceptions are OK if there is an
+        // uninterruptible FFI call.
         ASSERT(t->blocked_exceptions == END_BLOCKED_EXCEPTIONS_QUEUE
+               || t->why_blocked == BlockedOnCCall
                || (t->flags & TSO_BLOCKEX));
         
         if (tmp == NULL) {