#4248: Poor error message when openFile fails to open named pipe
---------------------------------+------------------------------------------
Reporter: Khudyakov | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/base
Version: 6.12.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
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:
1. Create named pipe
{{{
$ mkfifo /tmp/fifo
}}}
2. Now in GHCi:
{{{
Prelude> openFile "/tmp/fifo" WriteMode
*** Exception: /tmp/fifo: openFile: does not exist (No such device or
address)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4248>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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