Typed holes are very slow
If you type at the GHCi prompt
ghci> 3 _ 4
(which I did for #14969 (closed)), you get a multi-second pause before the error message comes out.
I think this is because the error-message generator is looking through the entire type environment. But it's really too slow.
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |