GHC Build Reports wrote:

[3 of 5] Compiling Language.Haskell.TH.Ppr ( Language/Haskell/TH/Ppr.hs, 
dist/build/Language/Haskell/TH/Ppr.o )
[4 of 5] Compiling Language.Haskell.TH.Lib ( Language/Haskell/TH/Lib.hs, 
dist/build/Language/Haskell/TH/Lib.o )
[5 of 5] Compiling Language.Haskell.TH ( Language/Haskell/TH.hs, 
dist/build/Language/Haskell/TH.o )
[1 of 5] Compiling Language.Haskell.TH.Syntax ( Language/Haskell/TH/Syntax.hs, 
dist/build/Language/Haskell/TH/Syntax.p_o )

Language/Haskell/TH/Syntax.hs:48:0:
    Warning: Module `Data.PackedString' is deprecated:
                 use Data.ByteString, Data.ByteString.Char8, or plain String.

Language/Haskell/TH/Syntax.hs:48:0:
    Warning: Deprecated use of `packString'
             (imported from Data.PackedString):
             use Data.ByteString, Data.ByteString.Char8, or plain String.

Language/Haskell/TH/Syntax.hs:48:0:
    Warning: Deprecated use of `unpackPS'
             (imported from Data.PackedString):
             use Data.ByteString, Data.ByteString.Char8, or plain String.

Language/Haskell/TH/Syntax.hs:48:0:
    Warning: Deprecated use of type constructor or class `PackedString'
             (imported from Data.PackedString):
             use Data.ByteString, Data.ByteString.Char8, or plain String.
Error: reserved stack space exceeded!
  Possible workarounds: compile with -fasm, or try another version of gcc.

Something bad has happened since yesterday. GHC is now space leaking badly while compiling Language.Haskell.TH.Syntax, on our x86-64 box it grows to 2Gb before the OS kills it. This definitely didn't happen in yesterday's build, but I don't see any suspicious-looking patches since then.

Any ideas anyone? I'll try unpulling a few things and see if I can find out what introduced the problem.

Cheers,
        Simon

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