Core dump with svn2git when using SVN 1.8

[Nicolás Alvarez]

> El 6 ago 2017, a las 13:50, John Lawlor <jk.lawlor at gmail.com> escribió:
> 
> Hi,
> 
> I converted a SVN repository back in March using svn2git, and it ran fine. As the live migration approaches I tried to run the conversion tool again and I got a core dump a point in the SVN history that previously was fine. When I ran the tool in March it didn't fail at this point:
> 
> warning: core file may not match specified executable file.
> [New LWP 27090]
> [New LWP 27092]
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> Core was generated by `/u01/svn/svn2git/svn-all-fast-export --svn-ignore --add-metadata --identity-map'.
> Program terminated with signal 6, Aborted.
> #0  0x00007ffdfefde1d7 in __GI_raise (sig=sig at entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> 56        return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
> (gdb) bt
> #0  0x00007ffdfefde1d7 in __GI_raise (sig=sig at entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> #1  0x00007ffdfefdf8c8 in __GI_abort () at abort.c:90
> #2  0x00007ffdffe177b4 in qt_message_output (msgType=msgType at entry=QtFatalMsg, buf=<optimized out>) at global/qglobal.cpp:2323
> #3  0x00007ffdffe17959 in qt_message(enum QtMsgType, const char *, typedef __va_list_tag __va_list_tag *) (msgType=msgType at entry=QtFatalMsg,
>     msg=msg at entry=0x438d38 "Failed to write to process: %s", ap=ap at entry=0x7fff83b86d60) at global/qglobal.cpp:2369
> #4  0x00007ffdffe18261 in qFatal (msg=msg at entry=0x438d38 "Failed to write to process: %s") at global/qglobal.cpp:2552
> #5  0x000000000042228d in QIODevice_write (baton=0x2ddc218, data=<optimized out>, len=<optimized out>) at svn.cpp:237
> #6  0x00007ffe0034f4a8 in svn_stream_copy3 (from=0x2fbda70, to=0x2fbdf80, cancel_func=0x0, cancel_baton=0x0, scratch_pool=<optimized out>)
>     at subversion/libsvn_subr/stream.c:503
> #7  0x000000000042262e in dumpBlob (txn=txn at entry=0x518d7c0, fs_root=fs_root at entry=0x2840820, pathname=<optimized out>, finalPathName=...,
>     pool=pool at entry=0x2b4d148) at svn.cpp:297
> #8  0x0000000000423fff in recursiveDumpDir (txn=txn at entry=0x518d7c0, fs_root=fs_root at entry=0x2840820, pathname=..., finalPathName=...,
>     pool=pool at entry=0x3ef69a8) at svn.cpp:340
> #9  0x0000000000423f53 in recursiveDumpDir (txn=txn at entry=0x518d7c0, fs_root=fs_root at entry=0x2840820, pathname=..., finalPathName=...,
>     pool=pool at entry=0x3efa9c8) at svn.cpp:335
> #10 0x0000000000423f53 in recursiveDumpDir (txn=txn at entry=0x518d7c0, fs_root=0x2840820, pathname=..., finalPathName=..., pool=pool at entry=0x31aaa18)
>     at svn.cpp:335
> #11 0x0000000000426e07 in SvnRevision::exportInternal (this=this at entry=0x7fff83b882c0,
>     key=key at entry=0x4fa6e48 "/ConfigurationDeploymentServer/branches/dan/VmAutoProvision/roles", change=change at entry=0x31aaf68,
>     path_from=<optimized out>, path_from at entry=0x0, rev_from=rev_from at entry=-1, current=..., rule=..., matchRules=...) at svn.cpp:914
> #12 0x000000000042b56b in SvnRevision::exportDispatch (this=this at entry=0x7fff83b882c0,
>     key=key at entry=0x4fa6e48 "/ConfigurationDeploymentServer/branches/dan/VmAutoProvision/roles", change=change at entry=0x31aaf68, path_from=0x0,
>     rev_from=-1, changes=changes at entry=0x31aaa90, current=..., rule=..., matchRules=..., pool=pool at entry=0x2c20da8) at svn.cpp:716
> #13 0x000000000042cff0 in SvnRevision::exportEntry (this=this at entry=0x7fff83b882c0,
>     key=0x4fa6e48 "/ConfigurationDeploymentServer/branches/dan/VmAutoProvision/roles", change=0x31aaf68, changes=0x31aaa90) at svn.cpp:666
> #14 0x000000000042f091 in SvnRevision::prepareTransactions (this=this at entry=0x7fff83b882c0) at svn.cpp:536
> #15 0x000000000042f660 in SvnPrivate::exportRevision (this=<optimized out>, revnum=revnum at entry=476966) at svn.cpp:444
> #16 0x000000000042f7ec in Svn::exportRevision (this=this at entry=0x7fff83b88460, revnum=revnum at entry=476966) at svn.cpp:154
> #17 0x0000000000407754 in main (argc=8, argv=<optimized out>) at main.cpp:276
> (gdb) q
> 
> This branch was fine the last time I ran the conversion. I can't think what the difference might be, it's the same machine that I ran it on in March. The only difference I can think of is that I have using Subversion 1.8. I can't be sure but I think that svn2git must have a dependency on subversion-devel libraries, so if they are a different version that might be the cause of the problem. I am not sure though. Any suggestions greatly appreciated.
> 
> Regards,
> John
> 

That looks like git-fast-import quit or crashed, and svn2git suddenly finds it can't write to it and calls qFatal.

See if there is any "fast import crash" file (I don't remember the exact filename) inside the incomplete git repository.

-- 
Nicolás
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