• Vladislav Zavialov's avatar
    Enable -Wcompat=error in the testsuite · 165d3d5d
    Vladislav Zavialov authored
    Enabling -Werror=compat in the testsuite allows us to easily see the
    impact that a new warning has on code. It also means that in the period
    between adding the warning and making the actual breaking change, all
    new test cases that are being added to the testsuite will be
    forwards-compatible. This is good because it will make the actual
    breaking change contain less irrelevant testsuite updates.
    
    Things that -Wcompat warns about are things that are going to break in
    the future, so we can be proactive and keep our testsuite
    forwards-compatible.
    
    This patch consists of two main changes:
    
    * Add `TEST_HC_OPTS += -Werror=compat` to the testsuite configuration.
    * Fix all broken test cases.
    
    Test Plan: Validate
    
    Reviewers: hvr, goldfire, bgamari, simonpj, RyanGlScott
    
    Reviewed By: goldfire, RyanGlScott
    
    Subscribers: rwbarton, carter
    
    GHC Trac Issues: #15278
    
    Differential Revision: https://phabricator.haskell.org/D5200
    165d3d5d
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