Failed to write to process: Error writing to process | fatal: Empty path component found in input

[valarion]

Hi, I'm trying to convert an old svn repo and I'm getting this problem.

The crash report:

fast-import crash report:
    fast-import process: 15204
    parent process     : 1
    at 2019-08-20 09:28:46 +0000

fatal: Empty path component found in input

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  commit refs/heads/master
  mark :19
  committer user <user@localhost> 1190996168 +0000
  data 39
  deleteall
* M 100644 :18446744073709551614 /.gitignore

Active Branch LRU
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refs/heads/master:
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  tip commit  : 9e09d0745d5af0c3978f948e10fd135c07783625
  old tree    : 0000000000000000000000000000000000000000
  cur tree    : 0000000000000000000000000000000000000000
  commit clock: 0
  last pack   :


Marks
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  exported to marks-REPO

-------------------
END OF CRASH REPORT

[valarion]

removing the option --svn-ignore solves the problem, but I have to create the gitignore manually

[eeijlar]

Did it generate a core dump?

[valarion]

Only a stackdump, that I can find:

Stack trace:
Frame        Function    Args
000FFFFC110  00180060BF9 (00000000000, 00000000002, 000FFFFC328, 000FFFFDE50)
00000000000  00180062AD7 (00000000064, 00000000000, 00000000310, 00000000000)
000FFFFC400  001801314DB (0018021AE28, 000FFFFD680, 001801007F0, 00000000000)
006000845F8  001801575E4 (E99A8A6755B11D03, 0018030BBD0, 0018030BBD0, 0060007E878)
006000845F8  0018012DB7B (E99A8A6755B11D03, 000FFFFFFFF, 000FFFFC740, 000FFFFC858)
006000845F8  0018012DEAF (000FFFFC880, 00000000000, 001800C88DE, 000FFFFC770)
006000845F8  003FD7AF220 (00000000003, 006001175C8, 006000845F8, 00600084068)
006000845F8  0010040BF74 (006001CDAC0, 006001CDA38, 00600089290, 00600099460)
000FFFFCA00  001004121AB (00000000014, 00000000001, 00050141550, 000FFFFFFFF)
00000000014  0010041689B (00600000410, 000FFFFCAF0, 000FFFFCAF8, 000FFFFCB30)
000FFFFCAE0  0010041699C (000FFFF0040, 000FFFFCAE0, 00180151130, 003FD8AE940)
000FFFFCAE0  0010042CB16 (00180056A61, 001802D4100, 0000000002F, 0018033A6D1)
000FFFFCCD0  0018004A816 (00000000000, 00000000000, 00000000000, 00000000000)
00000000000  00180048353 (00000000000, 00000000000, 00000000000, 00000000000)
000FFFFFFF0  00180048404 (00000000000, 00000000000, 00000000000, 00000000000)
End of stack trace

[Matze2]

I got a similar crash with the following stack on 1.0.16:

#0  0x00007f66fdf3c160 in raise () from /lib64/libc.so.6
#1  0x00007f66fdf3d741 in abort () from /lib64/libc.so.6
#2  0x00007f66fe9048a7 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib64/libQt5Core.so.5
#3  0x000055980b9f862c in FastImportRepository::Transaction::commit (this=0x55980d2f3240) at repository.cpp:1204
#4  0x000055980ba01c51 in SvnRevision::commit (this=this@entry=0x7ffe1697ce00) at svn.cpp:605
#5  0x000055980ba06290 in SvnPrivate::exportRevision (this=<optimized out>, revnum=3122) at svn.cpp:472
#6  0x000055980ba0639c in Svn::exportRevision (this=<optimized out>, revnum=<optimized out>) at svn.cpp:154
#7  0x000055980b9e61bf in main (argc=<optimized out>, argv=<optimized out>) at main.cpp:279

This happens at the third relevant revision: a modification after reorg of folders from trunk/Base to Base/trunk:

------------------------------------------------------------------------
r3122 | matze | 2015-07-11 08:26:27 +0200 (Sa, 11. Jul 2015) | 1 Zeile
Geänderte Pfade:
   M /Base/trunk/pom.xml

Update commons-lang and junit versions
------------------------------------------------------------------------
r3101 | matze | 2015-07-04 02:19:26 +0200 (Sa, 04. Jul 2015) | 1 Zeile
Geänderte Pfade:
   A /Base/trunk/.classpath (von /trunk/Base/.classpath:3100)
   A /Base/trunk/.project (von /trunk/Base/.project:3100)
   A /Base/trunk/.settings (von /trunk/Base/.settings:3100)
   A /Base/trunk/changes.txt (von /trunk/Base/changes.txt:3100)
   A /Base/trunk/pom.xml (von /trunk/Base/pom.xml:3100)
   A /Base/trunk/src (von /trunk/Base/src:3100)
   A /Base/trunk/test (von /trunk/Base/test:3100)
   D /trunk/Base/.classpath
   D /trunk/Base/.project
   D /trunk/Base/.settings
   D /trunk/Base/changes.txt
   D /trunk/Base/pom.xml
   D /trunk/Base/src
   D /trunk/Base/test


------------------------------------------------------------------------
r3100 | matze | 2015-07-04 02:19:07 +0200 (Sa, 04. Jul 2015) | 1 Zeile
Geänderte Pfade:
   A /Base
   A /Base/branches
   A /Base/tags
   A /Base/trunk


------------------------------------------------------------------------

and finally the crash report from git fast-import:

fast-import crash report:
    fast-import process: 18617
    parent process     : 18616
    at 2020-02-21 01:30:31 +0000

fatal: Empty path component found in input

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  data 1
  D /.settings
  D /src
  D /test
* M 100644 :18446744073709551614 /.classpath

Active Branch LRU
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  old tree    : 0000000000000000000000000000000000000000
  cur tree    : 0000000000000000000000000000000000000000
  commit clock: 0
  last pack   : 


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-------------------
END OF CRASH REPORT

If you need more information let me know.

[Vampire]

I already fixed the handling of .gitignore in the root directory in 60bfc16 and some other gitignore related bugs.
1.0.18 should not have this issue.

[fedorbirjukov]

Isn't that simply the error mentioned in the docs of match rules?

You need to make sure the regex matching a SVN directory path matches also the end slash (e.g. ./) otherwise Git fast-import will crash with an fatal: Empty path component found in input errors.
For example, the rule /project/trunk/.*/myFolder, should become /project/trunk/.*/myFolder/.

Same question for #158

[Vampire]

No, the problem here is about the file .gitignore in the root directory, and also there is no match-rule involved, but the file is generated from svn ignore properties due to the --svn-ignore switch.

The doc snippet you pasted talks about matching a directory with a match-rule where the final slash should be matched by the pattern.