svn segfault when using svn+ssh schema
Jon Turney
jon.turney@dronecode.org.uk
Sun Jan 8 21:16:00 GMT 2017
On 08/01/2017 20:45, David Rothenberger wrote:
> On 1/8/2017 6:12 AM, Sam Edge wrote:
[...]
>>
>> I've attached cygcheck & the segfault stackdump.
>>
>> I'm at a loss. Any ideas?
>
> [Cygwin subversion maintainer here.]
>
> Sorry, I have no further ideas. svn+ssh is working fine for me here
> using both Cygwin and Debian as the server. Debian is running Subversion
> 1.8.10.
>
> I personally lack the technical skills to decode the stack trace. Maybe
> someone else can. Alternatively, you could theoretically download the
The script at [1] shows how to do this. Unfortunately...
> $ stackdump2backtrace svn.stackdump
> 0x0000000180053d3f dll_list::populate_deps(dll*) dll_init.cc:271
> 0x0000000180053f9a dll_list::topsort() dll_init.cc:309
> 0x00000001800ab62d fork fork.cc:597
> 0x000000018011882b xc sigfe.s:43
> 0x00000003fa778644 xc ??:0
> 0x00000003ed275773 xc ??:0
> 0x00000003ed275e3d xc ??:0
> 0x00000003ed2d41f4 xc ??:0
> 0x00000003ed40fc0f xc ??:0
> 0x00000003ed41079e xc ??:0
> 0x00000003ed3f2d59 xc ??:0
> 0x00000003ed3f3320 xc ??:0
> 0x000000010040b9f9 svn_cl__list list-cmd.c:387
> 0x00000001004178fd sub_main svn.c:3042
> 0x000000010041b755 main svn.c:3126
> 0x0000000180047902 dll_crt0_1(void*) dcrt0.cc:1018
... this is a crash in the cygwin DLL.
Also unfortunately, the stackdump doesn't record the DLLs loaded and
their bases addresses, so we can only guess which one ended up at
0x00000003e0000000
> subversion debug package and reproduce the error in gdb to get a
> backtrace. Again, my C/gdb skills are rusty, so I can't provide any
> details about how to do that.
So see also [2] and note well the point about 'set cygwin-exceptions on'
[1] https://cygwin.com/ml/cygwin/2015-08/msg00311.html
[2] https://cygwin.com/faq.html#faq.programming.debugging-cygwin
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