diff options
| -rw-r--r-- | compiler/ghci/ByteCodeGen.lhs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/ghci/ByteCodeGen.lhs b/compiler/ghci/ByteCodeGen.lhs index 4ec8043851..d92e7f867f 100644 --- a/compiler/ghci/ByteCodeGen.lhs +++ b/compiler/ghci/ByteCodeGen.lhs @@ -1534,7 +1534,10 @@ recordItblMallocBc a getLabelBc :: BcM Word16 getLabelBc - = BcM $ \st -> return (st{nextlabel = 1 + nextlabel st}, nextlabel st) + = BcM $ \st -> do let nl = nextlabel st + when (nl == maxBound) $ + panic "getLabelBc: Ran out of labels" + return (st{nextlabel = nl + 1}, nl) getLabelsBc :: Word16 -> BcM [Word16] getLabelsBc n |