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 |