X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FnativeGen%2FRegAllocLinear.hs;h=e6491b77ee9a15cdbc437d30e2067c47a5695530;hp=888ef16c70e3b6248c0bdc4149838d5b8fcc3297;hb=e3971de1fe67e414060047c09c4d5c64c7083981;hpb=5642651b4ac4da3c9c5981ffcde9baf09217a296

diff --git a/compiler/nativeGen/RegAllocLinear.hs b/compiler/nativeGen/RegAllocLinear.hs
index 888ef16..e6491b7 100644
--- a/compiler/nativeGen/RegAllocLinear.hs
+++ b/compiler/nativeGen/RegAllocLinear.hs
@@ -222,7 +222,8 @@ emptyStackMap = StackMap [0..maxSpillSlots] emptyUFM
 
 getStackSlotFor :: StackMap -> Unique -> (StackMap,Int)
 getStackSlotFor (StackMap [] _) _
-	= panic "RegAllocLinear.getStackSlotFor: out of stack slots"
+	= panic "RegAllocLinear.getStackSlotFor: out of stack slots, try -fregs-graph"
+        -- This happens with darcs' SHA1.hs, see #1993
 
 getStackSlotFor fs@(StackMap (freeSlot:stack') reserved) reg =
     case lookupUFM reserved reg of