Re: #16362: Deriving a class via an instance that has a TypeError constraint using standalone deriving fails during compilation.
"GHC" <[email protected]>
| Newsgroups | gmane.comp.lang.haskell.glasgow.bugs |
|---|---|
| Message-ID | <[email protected]> |
#16362: Deriving a class via an instance that has a TypeError constraint using
standalone deriving fails during compilation.
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Reporter: j9794 | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 8.6.3
Resolution: | Keywords: TypeErrors
Operating System: Unknown/Multiple | Architecture:
Type of failure: GHC rejects | Unknown/Multiple
valid program | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
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Comment (by RyanGlScott):
I don't think I'm qualified to say. I've never been clear on what exactly
the semantics of `TypeError` actually //intended// to be, so it's anyone's
guess as to whether this is a bug or a feature.
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16362#comment:4>