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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2012-11-06 16:03:11 +0000 |
|---|---|---|
| committer | Simon Peyton Jones <simonpj@microsoft.com> | 2012-11-06 16:03:11 +0000 |
| commit | 4dade857ec0b1655b6297191b9262eb5174eec87 (patch) | |
| tree | 2232491172af54970e420e0864b3754d9f93c18f /compiler/codeGen | |
| parent | acbe5265d053e6497626f12f49f38aa31ff730e5 (diff) | |
| download | haskell-4dade857ec0b1655b6297191b9262eb5174eec87.tar.gz | |
Make rewriteCtFlavor lazy in the coercion for Derived evidence
I think I accidentally introduced this bug a month ago when
refactoring. It's a bit non-obvious, but since Derived constraints
have no evidence, we mustn't be strict in it. Now there's a big
comment to prevent this bug happening again.
This fixes Trac #7384.
Diffstat (limited to 'compiler/codeGen')
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