Improve error messsage when argument count varies

[ghc-hetmet.git] / ghc / rts / Stable.c

diff --git a/ghc/rts/Stable.c b/ghc/rts/Stable.c
index 818f0f0..09efb6a 100644 (file)
--- a/ghc/rts/Stable.c
+++ b/ghc/rts/Stable.c
@@ -80,7 +80,9 @@ static snEntry *stable_ptr_free = NULL;
 
 static unsigned int SPT_size = 0;
 
+#ifdef THREADED_RTS
 static Mutex stable_mutex;
+#endif
 
 /* This hash table maps Haskell objects to stable names, so that every
  * call to lookupStableName on a given object will return the same
@@ -143,7 +145,9 @@ initStablePtrTable(void)
     //
     // Also, getStablePtr is now called from __attribute__((constructor))
     // functions, so initialising things here wouldn't work anyway.
+#ifdef THREADED_RTS
     initMutex(&stable_mutex);
+#endif
 }
 
 /*
@@ -188,7 +192,6 @@ lookupStableName_(StgPtr p)
   if (sn != 0) {
     ASSERT(stable_ptr_table[sn].addr == p);
     IF_DEBUG(stable,debugBelch("cached stable name %ld at %p\n",sn,p));
-    RELEASE_LOCK(&stable_mutex);
     return sn;
   } else {
     sn = stable_ptr_free - stable_ptr_table;