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Subject: Re: cppcheck 1.77 Segmentation fault (64-bit)
To: cygwin@cygwin.com
References: <CAK-n8j57fMX0fbwExi+4RmrKpX0W+0ujQaq=OWchwhTq2wBQxw@mail.gmail.com> <1461736e-51a3-3bb3-cbaf-90b6d41548a1@tiscali.co.uk> <CAK-n8j4fu0QQ8-=1NYkGikWV5EMWBdkED7u9f50+w-tRLSabyw@mail.gmail.com>
From: David Stacey <drstacey@tiscali.co.uk>
Message-ID: <ed80a1b5-754f-09f1-614d-b84aaf4ec18b@tiscali.co.uk>
Date: Sat, 4 Feb 2017 00:08:09 +0000
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On 29/01/17 21:04, Jim Reisert AD1C wrote:
> Best as I can tell, the seg fault is due to having installed the test
> version of gcc 6.0.  Even uninstalling gcc 6.0 does not fix the
> problem.  I had to create an entirely new Cygwin-64 environment to get
> past the problem.
>
> I invite you (Dave) to try the experiment yourself.  You would be wise
> to back up your Cygwin environment before doing this.

I've spent a little time looking into this. As per the stack track you 
supplied, cppcheck is falling over constructing a std::istringstream 
with a string passed in to initialise the stream. I'll need to debug 
this into the STL to work out exactly why the seg fault is occurring.

Note that there's more to this than simply constructing a 
std::istringstream - compiling the example given in [1] works fine, even 
if I use the same g++ switches used to build cppcheck. So there's 
something else going on...

Dave.

[1] 
http://www.cplusplus.com/reference/sstream/basic_istringstream/basic_istringstream/


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