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Subject: Re: graph (plotutils) seg-faulting
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From: Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Ken Brown <kbrown AT cornell DOT edu>
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On 7/22/2020 6:07 PM, Tony Richardson via Cygwin wrote:
> On Wed, Jul 22, 2020 at 3:48 PM Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
> wrote:
> 
>> On 22.07.2020 14:06, Ken Brown via Cygwin wrote:
>>> On 7/22/2020 1:36 AM, Marco Atzeri via Cygwin wrote:
>>>> On 22.07.2020 02:10, Tony Richardson via Cygwin wrote:
>>>>> I have attached both the cygcheck and strace output.
>>>>>
>>>>> Tony Richardson
>>>>>
>>>>
>>>> something is clearly interfering with your Cygwin installation
>>>>
>>>> --- Process 11136 loaded C:\Applications\cygwin64\bin\cygwin1.dll at
>>>> 0000000000c80000
>>>> --- Process 11136 unloaded DLL at 0000000000c80000
>>>
>>> I can reproduce the problem on my system:
>>>
>>> $ strace graph
>> ...
>>
>>> Segmentation fault
>>>
>>>
>>> I thought that simply rebuilding plotutils might fix the problem, but
>>> there were a lot of compilation warnings, and the build failed.  Some of
>>> the warnings look serious to me, but I have no idea if they could cause
>>> Windows to try to load DLLs at strange addresses.
>>>
>>> Ken
>>> --
>>
>> Hi Ken,
>> I rebuilt and uploaded a test version 2.6-6 only for 64bit
>> try to see if something change
>>
>> Regards
>> Marco
>>
> 
> I tried the test version, unfortunately it still segfaults for me.

Same for me.  I'm also getting strange output from ldd, but maybe that's just 
another manifestation of the same problem:

$ ldd /usr/bin/graph
         ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7ff82a4c0000)
         KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7ff8289c0000)
         KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll (0x7ff8280c0000)
         cygplot-2.dll => /usr/bin/cygplot-2.dll (0x9f0000)
         cygplot-2.dll => /usr/bin/cygplot-2.dll (0xbf0000)
         cygplot-2.dll => /usr/bin/cygplot-2.dll (0xbf0000)
         cygwin1.dll => /usr/bin/cygwin1.dll (0xd20000)
[...]
         cygintl-8.dll => /usr/bin/cygintl-8.dll (0x1760000)
         cygintl-8.dll => /usr/bin/cygintl-8.dll (0x1760000)
         cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x1780000)
         cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x1780000)

Ken
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