GHCi :r does not reset imported class instances
Have a module contain:
import Control.Monad.Error ()
fromError :: Either String a -> a
fromError = either error id
boom = fromError (return 'x')and load in it GHCi. Remove the first line (import ...) and reload. GHCi compiles happily, but then evaluating boom gives:
During interactive linking, GHCi couldn't find the following symbol:
mtlzm1zi1zi0zi0_ControlziMonadziErrorziClass_zdf2_closure
GHCi should instead produce a compiler error on reloading.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |