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Simon Marlow authored
Clean up GHC's error reporting. - the GhcException type has some more constructors: CmdLineError, UserError, and InstallationError. OtherError has gone. - most error messages should begin with "<location>:". When the error is on the command-line or in GHC itself, <location> is "ghc", for consistency with std Unix semantics. - GHCi no longer prints a superfluous "ghc: " before certain error messages.
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