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Hi - thanks for your work on shake. I noticed that the error reporting degraded somewhat under ghc 9.12.2:
In a Example.hs like:
#!/usr/bin/env cabal
{- cabal:
build-depends:
base
, shake
-}
import Development.Shake
main :: IO ()
main = shakeArgs shakeOptions $ do
want ["foo.txt"]
"*.txt" %> \out -> do
pure ()Running this with ghc 9.10.3:
~
❮ ghcup set ghc 9.10.3
[ Info ] GHC 9.10.3 successfully set as default version
Gives a helpful error message:
~
↪ ./Example.hs
Error when running Shake build system:
at want, called at /path/to/Example.hs:14:3 in fake-package-0-inplace-script-Example.hs:Main
* Depends on: foo.txt
at error, called at src/Development/Shake/Internal/Rules/File.hs:179:58 in shake-0.19.8-488b5a5cc87df829ac1c6a3ebfeceebc03fee9a278623f5d982bfc78c9b4a532:Development.Shake.Internal.Rules.File
* Raised the exception:
Error, rule finished running but did not produce file:
foo.txt
But with ghc 9.12.2:
ghcup set ghc 9.12.2
It returns:
cabal-script-Example.hs: Uncaught exception ghc-internal:GHC.Internal.Exception.ErrorCall:
ErrorCallWithLocation has been deprecated in favour of ErrorCall (which does not have a location). Backtraces are now handled by the backtrace exception mechanisms exclusively.
HasCallStack backtrace:
error, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:184:68 in ghc-internal:GHC.Internal.Exception
Update: Looks like there were already some commits related to this (fc82eee). Is only a release missing?
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