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[perl #112244] PerlIO_unread fails easily when :crlf is active

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From:
Leon Timmermans via RT
Date:
April 4, 2012 23:23
Subject:
[perl #112244] PerlIO_unread fails easily when :crlf is active
Message ID:
rt-3.6.HEAD-4610-1333607031-264.112244-15-0@perl.org
On Wed Apr 04 10:47:08 2012, derhoermi@gmx.net wrote:
> Hi,
> 
>   I ran into trouble using IO::Unread which uses PerlIO_unread to unread
> to a handle, every now and then it would unread less than what it should
> have. Discussing this on #p5p it turned out that the :crlf layer was the
> problem (binmode-ing the handle solved the issue) and leont asked me to
> file a bug about it. I can supply a test case (relying on IO::Unread) if
> necessary.
> 
> regards,

The problem is that :crlf doesn't fall back on :pending the way :perlio
does when the unread data doesn't fit into its own buffer. Instead it
just rejects them.

Leon

---
via perlbug:  queue: perl5 status: open
https://rt.perl.org:443/rt3/Ticket/Display.html?id=112244

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