[ ghc-Bugs-1244882 ] Template Haskell: reification of data types w/o constructors

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Bugs item #1244882, was opened at 2005-07-25 17:39
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Category: Template Haskell
Group: 6.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Wolfgang Thaller (wthaller)
Assigned to: Nobody/Anonymous (nobody)
Summary: Template Haskell: reification of data types w/o constructors

Initial Comment:
Reifying data types without constructors works in --make mode, but 
causes an exception in TcSplice.lhs in one-shot compilation.

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Comment By: Nobody/Anonymous (nobody)
Date: 2005-07-26 01:31

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Logged In: NO 

Thanks. Now fixed.

Simon

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Comment By: Wolfgang Thaller (wthaller)
Date: 2005-07-25 18:02

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user_id=566359

In fact, it happens whenever no constructors are exported for the data 
type.

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Comment By: Wolfgang Thaller (wthaller)
Date: 2005-07-25 17:42

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user_id=566359

A simple test case is attached.
ghc --make Main.hs works as expected.

ghc -c Foo.hs ; ghc -c Main.hs
yields the following error:

Main.hs:1:0:
    Exception when trying to run compile-time code:
      typecheck/TcSplice.lhs:(577,4)-(587,87): Non-exhaustive patterns in 
case

      Code: testReify 'Foo


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