Nicer panic message

diff --git a/compiler/nativeGen/X86/CodeGen.hs b/compiler/nativeGen/X86/CodeGen.hs
index 2e72d16..799dec3 100644 (file)
--- a/compiler/nativeGen/X86/CodeGen.hs
+++ b/compiler/nativeGen/X86/CodeGen.hs
@@ -1633,7 +1633,7 @@ genCCall target dest_regs args = do
                w  = typeWidth ty
                r_dest_hi = getHiVRegFromLo r_dest
                r_dest    = getRegisterReg (CmmLocal dest)
-       assign_code many = panic "genCCall.assign_code many"
+       assign_code many = pprPanic "genCCall.assign_code - too many return values:" (ppr many)
 
     return (push_code `appOL` 
            call `appOL`