I didn't read closely enough: I see now that it's a warning, not an error. I initially didn't export that constructor since it's only present on Windows for API compatibility, but will never be used. Since this is just the internals module, I can export it, but my preference would in fact be to leave it as-is with the warning. Two alternatives:
1. Create a new hidden module that creates and exports the type constructor, just to hide the warning. I'm -1 on that, since that's extra compile time everyone has to endure just for warning avoidance. 2. base could export CGid for Windows (currently, it does not). On Mon, Nov 2, 2015 at 5:17 AM, Michael Snoyman <[email protected]> wrote: > I'll look into this. I just made a new release of process, and was certain > I tested on Windows, but perhaps something changed between that commit and > release. > > On Mon, Nov 2, 2015 at 5:15 AM, Simon Peyton Jones <[email protected]> > wrote: > >> I’m getting this on HEAD in te ‘ >> >> libraries\process\System\Process\Internals.hs:106:16: warning: >> >> Defined but not used: data constructor ‘CGid’ >> >> Indeed it looks as if CGId(..) should be exported, else createProcess is >> unusuable. This looks like the right change. Would someone like to check >> and make the change >> >> Simon >> >> diff --git a/System/Process/Internals.hs b/System/Process/Internals.hs >> >> index 5575ac4..3e23ad5 100644 >> >> --- a/System/Process/Internals.hs >> >> +++ b/System/Process/Internals.hs >> >> @@ -37,6 +37,8 @@ module System.Process.Internals ( >> >> #if !defined(mingw32_HOST_OS) && !defined(__MINGW32__) >> >> pPrPr_disableITimers, c_execvpe, >> >> ignoreSignal, defaultSignal, >> >> +#else >> >> + CGid(..), GroupID, UserID, >> >> #endif >> >> withFilePathException, withCEnvironment, >> >> translate, >> >> _______________________________________________ >> ghc-devs mailing list >> [email protected] >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> >> >
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