id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3640,NamedFieldPuns broken in where clauses,cjs,igloo,"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.",merge,closed,normal,,Compiler,6.12.1 RC1,fixed,NamedFieldPuns,,Linux,x86_64 (amd64),,Unknown,rename/should_compile/T3640,,,