Don't uninstall signal handlers if none were installed
GHC 7.8.2 calls resetSignalHandlers even when --install-signal-handlers=no is specified. On windows this results in the call to SetConsoleCtrlHandler failing.
The attached patch only calls resetSignalHandlers when there are signal handlers to remove (it mirrors the logic used when installing the handlers).
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Runtime System |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | simonmar |
| Operating system | |
| Architecture |