#1265: Template Haskell fail Messages not Getting Through
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Reporter: [EMAIL PROTECTED] | Owner: igloo
Type: bug | Status: new
Priority: normal | Milestone: 6.8
Component: Template Haskell | Version: 6.6
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Os: Unknown | Testcase:
Architecture: Unknown |
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Changes (by simonpj):
* owner: => igloo
Comment:
I think IOEnv eats the message because the typechecker (for example) often
does fail, having stuffed its error message in the bag of errors. We
don't want an '''additional''' message from the fail; the purpose of the
fail is just to propagate an exception out to the recovery point if any.
Maybe there's another way to do this. But meanwhile, the bug is fixed.
Now you get
{{{
Prelude> let doit = fail "Code not written yet" ::Language.Haskell.TH.ExpQ
Loading package template-haskell ... linking ... done.
Prelude> $(doit)
<interactive>:1:2: Code not written yet
Prelude>
}}}
I'm leaving the bug open but assigned to Ian, in the hope that he'll add a
test case and then close it.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1265>
GHC <http://www.haskell.org/ghc/>
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