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[perl #129176] Conditional jump depends on uninitialized values inS_scan_heredoc

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From:
Father Chrysostomos via RT
Date:
September 5, 2016 13:41
Subject:
[perl #129176] Conditional jump depends on uninitialized values inS_scan_heredoc
Message ID:
rt-4.0.24-25474-1473082872-1556.129176-15-0@perl.org
On Mon Sep 05 06:13:44 2016, davem wrote:
> On Fri, Sep 02, 2016 at 10:31:37PM -0700, Father Chrysostomos via RT
> wrote:
> > On Fri Sep 02 13:38:21 2016, dcollinsn@gmail.com wrote:
> > > $ perl -e 'print "<<`\\"' | valgrind ../bin/perl
> > ...
> > > Can't find string terminator "\" anywhere before EOF at - line 1.
> >
> > Wrong error message.
> >
> > delimcpy (used to find the end of the `\... after <<) is going one
> > byte past the end of the buffer passed to it, because the trailing
> > null is ‘escaped’ with a backslash.  delimcpy needs fixing.
> >
> > scan_heredoc perfectly reasonably croaks only if s==PL_bufend, since
> > if s<PL_bufend the terminating ` was found.  In this case
> > s>PL_bufend, which would not happen with a properly functioning
> > delimcpy.
> 
> Note that I already have a fix worked up for this;

It doesn’t conflict with ba0a4150f6f, does it?

-- 

Father Chrysostomos


---
via perlbug:  queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=129176

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