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createDirectoryIfMissing does not fail on unwritable parent dir

On OSX, using createDirectoryIfMissing to create a new directory inside a directory for which we do not have write permissions does not throw any exception. Of course it should throw an exception, as it does under Linux.

$ mkdir unwritable
$ chmod ugo-w unwritable
$ ghci
> System.Directory.createDirectoryIfMissing True "unwritable/tst"
>

On OSX (10.9.2) this does not fail. Under Linux (albeit with 7.6.3) this does throw an exception as expected:

*** Exception: unwritable/tst: createDirectory: permission denied (Permission denied)
Trac metadata
Trac field Value
Version 7.8.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component libraries/directory
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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