Avoid backtraces on expected failures when built with ghc 8; only use backtraces for unexpected errors.

ghc 8 added backtraces on uncaught errors. This is great, but git-annex was
using error in many places for a error message targeted at the user, in
some known problem case. A backtrace only confuses such a message, so omit it.

Notably, commands like git annex drop that failed due to eg, numcopies,
used to use error, so had a backtrace.

This commit was sponsored by Ethan Aubin.
This commit is contained in:
Joey Hess 2016-11-15 21:29:54 -04:00
parent 69915c6c9b
commit 0a4479b8ec
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116 changed files with 287 additions and 270 deletions

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@ -29,7 +29,7 @@ showChecking :: Describable a => a -> Annex ()
showChecking v = showAction $ "checking " ++ describe v
cantCheck :: Describable a => a -> e
cantCheck v = error $ "unable to check " ++ describe v
cantCheck v = giveup $ "unable to check " ++ describe v
showLocking :: Describable a => a -> Annex ()
showLocking v = showAction $ "locking " ++ describe v