Prevent users from defining instances for abstract classes.
ClosedPublic

Authored by ezyang on Mar 1 2017, 2:12 AM.

Details

Summary

Fixes Trac #13068.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Test Plan

validate

Diff Detail

Repository
rGHC Glasgow Haskell Compiler
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Unit
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ezyang created this revision.Mar 1 2017, 2:12 AM
This revision was automatically updated to reflect the committed changes.