#3640: NamedFieldPuns broken in where clauses
---------------------------+------------------------------------------------
Reporter: cjs | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.12.1 RC1 | Severity: major
Keywords: NamedFieldPuns | Testcase:
Os: Linux | Architecture: x86_64 (amd64)
---------------------------+------------------------------------------------
The attached file compiles fine under GHC 6.10. However, under 6.12, it
produces the error
{{{
BadPun.hs:8:17:
Conflicting definitions for `pun-right-hand-side'
In the binding group for: pun-right-hand-side, pun-right-hand-side,
pun-right-hand-side
}}}
Note that this affects the named field puns only in the where clause of
{{{badPun}}}; {{{goodPun}}}, which uses them in the LHS of a top-level
definition, does not have this problem.
A possibly interesting additional note is that if you change
{{{Record{f1,f2,}}}... to {{{Record{f1=f1,f2,}}}..., you'll find that you
get this error message instead:
{{{
BadPun.hs:8:23:
Conflicting definitions for `pun-right-hand-side'
In the binding group for: f1, pun-right-hand-side,
pun-right-hand-side
}}}
Changing {{{f2}}} to {{{f2=f2}}} as well makes the error go away,
presumably because there's now only one {{{pun-right-hand-side}}} defined.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3640>
GHC <http://www.haskell.org/ghc/>
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