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-rw-r--r--ghc/rts/Schedule.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ghc/rts/Schedule.c b/ghc/rts/Schedule.c
index 6d8fe63ff4..b0a8dc64c3 100644
--- a/ghc/rts/Schedule.c
+++ b/ghc/rts/Schedule.c
@@ -563,6 +563,8 @@ run_thread:
// ----------------------------------------------------------------------
// Run the current thread
+ ASSERT_FULL_CAPABILITY_INVARIANTS(cap,task);
+
prev_what_next = t->what_next;
errno = t->saved_errno;