-fdefer-type-errors doesn't defer errors from `deriving`
When I say
{-# OPTIONS_GHC -fdefer-type-errors #-}
data Foo = MkFoo
data Bar = MkBar Foo
deriving Show
I get a type error that there is no instance for Show Foo
. This error should be deferred.
Using standalone-deriving works just fine, though.
Trac metadata
Trac field | Value |
---|---|
Version | 7.8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |