GHCi thinks large list literals impossible?

Prelude> :set -fth
Prelude> $(let s = replicate 26227 'x' in [| s |])
Loading package template-haskell ... linking ... done.
ghc-6.6: panic! (the 'impossible' happened)
  (GHC version 6.6 for i386-unknown-linux):
        mkProtoBCO: stack use won't fit in 16 bits 131145

Note: I ran into this with a far more interestinng string, which I actually used TH to generate, but the code was a lot longer. I think this happens partly because Strings are lifted as ListE}}s of {{{(LitE . CharL)s, rather than as {LitE . StrinL}s, but even if you changed that I could still get the same thing to happen by replacing 'x' with (1::Int), so obviously that isn't the whole problem. (Why in the world does the code for long list literals need an enormous stack anyway?)

On a side note, this also crashes -ddump-ds, though that's probably reasonable...

Trac metadata

Trac field	Value
Version	6.6
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
Test case
Differential revisions
BlockedBy
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Blocking
CC
Operating system	Unknown
Architecture	Unknown