Poor error message when openFile fails to open named pipe
openFile cannot open named pipe if no one reads on the other end and fails with particularly unhelpful error message. Quick googling shows that it opens file in non-blocking mode so failure to open is not bug per se, but this fact is not mentioned in documentation.
Example:
- Create named pipe
$ mkfifo /tmp/fifo- Now in GHCi:
Prelude> openFile "/tmp/fifo" WriteMode
*** Exception: /tmp/fifo: openFile: does not exist (No such device or address)Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.12.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |