GHCi's :edit command calls the editor with stdin in nonblocking mode

[kaol]

When using editline support, GHCi sets stdin to nonblocking mode.

withReadline = bracket_ stopTimer (do startTimer; setNonBlockingFD 0
     -- Two problems are being worked around here:
     -- 1. readline sometimes puts stdin into blocking mode,
     --    so we need to put it back for the IO library

Most editors expect that stdin is in blocking mode and nothing in the code sets the mode that way and the editor inherits the mode via system call in editFile, when using :edit.

[simonmar]

Thanks for the report. This one is already fixed:

Fri Nov 14 13:05:46 GMT 2008  Simon Marlow <marlowsd@gmail.com>
  * Don't put stdin into non-blocking mode (#2778, #2777)