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The testsuite output now contains diagnostic codes, so many tests need
to be updated at once.
We decided it was best to keep the diagnostic codes in the testsuite
output, so that contributors don't inadvertently make changes to the
diagnostic codes.
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Commit 343cb32d0983f576d344a2d04a35c3fd6eecf2c5 (#13568) made GHC a bit
too cavalier in suggesting when data constructors are in scope (and
suggesting the use of `DataKinds`). This tones down the suggestions so
that `DataKinds` is only suggested if a data constructor of that name is
actually in scope (previously, it would always suggest, even if it was
out of scope).
Fixes #13948.
Test Plan: ./validate
Reviewers: mpickering, austin, bgamari
Reviewed By: mpickering
Subscribers: rwbarton, thomie
GHC Trac Issues: #13948
Differential Revision: https://phabricator.haskell.org/D3719
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Given multiple in-scope constructors with the same name, say `A`, and a
function of type `A -> Int`, say, the compiler reports both a "type `A`
is not in scope" and (incorrectly) an ambiguity error. The latter
shouldn't be there if `DataKinds` isn't enabled.
This issue was recommended to me by @mpickering as a suitable first
task, and the fix was also outlined in the original Trac ticket. It
involved a simple reordering of the steps taken in `lookup_demoted` in
`RnEnv.hs`. The fix is to make the `DataKinds` check happen earlier,
ensuring that the ambiguity check doesn't happen at all if we know the
constructors couldn't have been promoted.
Signed-off-by: Soham Chowdhury <chow.soham@gmail.com>
Reviewers: mpickering, austin, bgamari
Reviewed By: mpickering, bgamari
Subscribers: rwbarton, thomie
GHC Trac Issues: #13568
Differential Revision: https://phabricator.haskell.org/D3547
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This matches GCC's choice of Unicode quotation marks (i.e. U+2018 and U+2019)
and therefore looks more familiar on the console. This addresses #2507.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
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