In main, resolving.

Fixed in crew and crew-stable by b32a0596b2d7

Tested by converting nuxeo, jsdoc and a couple of problematic trac revisions.

pmezard: that's because you have to write:

svn ls http://jsdoc-toolkit.googlecode.com/svn/trunk/lib@26

This is mandatory when trying to get information about a deleted directory.
FWIW, hgsvn does just fine on that repository:

$ hg log -r svn.26 -r svn.27 -C -v  app
changeset:   26:64c21b0e54f0
branch:      trunk
tag:         svn.27
user:        micmath
date:        Sat Jun 16 00:29:53 2007 +0200
files:       app/DocTag.js app/Doclet.js app/JsDoc.js app/JsIO.js app/JsParse.js
app/JsPlate.js app/JsTestrun.js app/JsToke.js app/Symbol.js app/Util.js
app/js.jar app/run.js lib/DocTag.js lib/Doclet.js lib/JsDoc.js lib/JsIO.js
lib/JsParse.js lib/JsPlate.js lib/JsTestrun.js lib/JsToke.js lib/Symbol.js
lib/Util.js lib/js.jar lib/run.js
copies:      app/DocTag.js (lib/DocTag.js) app/Doclet.js (lib/Doclet.js)
app/JsDoc.js (lib/JsDoc.js) app/JsIO.js (lib/JsIO.js) app/JsParse.js
(lib/JsParse.js) app/JsPlate.js (lib/JsPlate.js) app/JsTestrun.js
(lib/JsTestrun.js) app/JsToke.js (lib/JsToke.js) app/Symbol.js (lib/Symbol.js)
app/Util.js (lib/Util.js) app/js.jar (lib/js.jar) app/run.js (lib/run.js)

FYI, another workaround for small repositories is to mirror them locally with
svnsync, then convert the local mirror. Unfortunately, svnsync is unable to work
on repository subdirectories.

I have seen similar problems (both the PROPFIND and the REPORT request ones) 
while converting memcached SVN.
The PROPFIND problem went away after updating mercurial *as well as* 
SVN+APR+NEON . This most likely happens due to the API return values being 
interpreted differently.
The REPORT request problem is most likely a problem of SVN server-client 
version conflicts. SVN added a lot new commands and properties in version 1.4 
(svnsync as well). Check versions of SVN server + client.

Just my $0.02

I am having the same issue while trying to convert
http://jsdoc-toolkit.googlecode.com/svn/trunk. Again, the log entry looks like:

------------------------------------------------------------------------
r27 | micmath | 2007-06-16 00:29:53 +0200 (Sam, 16 jui 2007) | 2 lines
Changed paths:
   A /trunk/app (from /trunk/lib:26)
   D /trunk/lib
------------------------------------------------------------------------

and the converter choke when accessing /trunk/lib:26.

What's interesting is:

$ svn ls -r 26 http://jsdoc-toolkit.googlecode.com/svn/trunk/lib
svn: REPORT request failed on '/svn/!svn/bc/377/trunk/lib'
svn: '/svn/!svn/bc/377/trunk/lib' path not found

Picking random revisions from 0 to 26, I cannot list the deleted directory. I
will try to reproduce this situation with a local subversion repository.

Sorry, I misread the initial report.

Here's the "renamed" changeset from svn log -v:

r25497 | bstefanescu | 2007-09-27 11:15:39 -0500 (Thu, 27 Sep 2007) | 1 line
Changed paths:
   D /org.nuxeo.ecm.client/trunk/commandline
   A /org.nuxeo.ecm.client/trunk/nuxeo-client-commands (from
/org.nuxeo.ecm.client/trunk/commandline:25496)

renamed

I wonder if the convert code is trying to look at trunk/commandline, which no
longer exists in this rev?

I forgot to add that I did hg pull -u my Mercurial tree and rebuild hg before
running this.  It looks somewhat like --traceback caused a second copy of the
same output to be emitted though.

Here's the output with hg --traceback convert
https://svn.nuxeo.org/nuxeo/org.nuxeo.ecm.client/trunk nuxeo-client-hg

initializing destination nuxeo-client-hg repository
scanning source...
sorting...
converting...
36 trunk creation
35 moved to cmd line clients project folders
34 renamed
Traceback (most recent call last):
  File "/home/jgoerzen/no-backup/programs/hg/mercurial/dispatch.py", line 45, in
_runcatch
    return _dispatch(ui, args)
  File "/home/jgoerzen/no-backup/programs/hg/mercurial/dispatch.py", line 348,
in _dispatch
    ret = _runcommand(ui, options, cmd, d)
  File "/home/jgoerzen/no-backup/programs/hg/mercurial/dispatch.py", line 401,
in _runcommand
    return checkargs()
  File "/home/jgoerzen/no-backup/programs/hg/mercurial/dispatch.py", line 357,
in checkargs
    return cmdfunc()
  File "/home/jgoerzen/no-backup/programs/hg/mercurial/dispatch.py", line 342,
in <lambda>
    d = lambda: func(ui, *args, **cmdoptions)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 398, in convert
    c.convert()
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 265, in convert
    self.copy(c)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 209, in copy
    changes = self.source.getchanges(rev)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/subversion.py",
line 213, in getchanges
    files, copies = self.expandpaths(rev, paths, parents)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/subversion.py",
line 429, in expandpaths
    fromkind = svn.ra.check_path(self.ra, entrypath, fromrev)
  File "/var/lib/python-support/python2.4/libsvn/ra.py", line 480, in
svn_ra_check_path
    return apply(_ra.svn_ra_check_path, args)
SubversionException: ("PROPFIND request failed on
'/org.nuxeo.ecm.client/trunk/commandline'", 175002)
** unknown exception encountered, details follow
** report bug details to http://www.selenic.com/mercurial/bts
** or mercurial@selenic.com
** Mercurial Distributed SCM (version be015f9b7405)
Traceback (most recent call last):
  File "/home/jgoerzen/programs/hg-devel/hg", line 14, in ?
    mercurial.dispatch.run()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 20, in run
    sys.exit(dispatch(sys.argv[1:]))
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 29, in dispatch
    return _runcatch(u, args)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 45, in _runcatch
    return _dispatch(ui, args)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 348, in _dispatch
    ret = _runcommand(ui, options, cmd, d)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 401, in _runcommand
    return checkargs()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 357, in checkargs
    return cmdfunc()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 342, in <lambda>
    d = lambda: func(ui, *args, **cmdoptions)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 398, in convert
    c.convert()
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 265, in convert
    self.copy(c)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/__init__.py",
line 209, in copy
    changes = self.source.getchanges(rev)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/subversion.py",
line 213, in getchanges
    files, copies = self.expandpaths(rev, paths, parents)
  File "/home/jgoerzen/no-backup/programs/hg-devel/hgext/convert/subversion.py",
line 429, in expandpaths
    fromkind = svn.ra.check_path(self.ra, entrypath, fromrev)
  File "/var/lib/python-support/python2.4/libsvn/ra.py", line 480, in
svn_ra_check_path
    return apply(_ra.svn_ra_check_path, args)
libsvn._core.SubversionException: ("PROPFIND request failed on
'/org.nuxeo.ecm.client/trunk/commandline'", 175002)

I tried running the same command with a http scheme instead of https, and it
looked like it was beginning to work.

I've pushed a change that causes convert to print more useful backtraces if you
run with --traceback, so it's at least possible to debug a problem.  Since SVN's
APIs are so weak, and so many SVN/WebDAV installs are broken in weird ways, I
don't think there's a more generally palatable solution available without
investing a lot of effort, unfortunately.

I tried running it as:

hg convert https://svn.nuxeo.org/nuxeo/org.nuxeo.ecm.client/trunk nuxeo-client-hg

and got exactly the same exception at exactly the same place.

The help text for hg convert really leads me to believe that it wants a checked
out working copy for svn.  It would be good to make this explicit for sure.

Not a bug.  You need to pass the URL of the SVN branch to convert, not the path
of the local working copy.

Steps to reproduce:

svn co https://svn.nuxeo.org/nuxeo/org.nuxeo.ecm.client/trunk nuxeo-client
hg convert nuxeo-client

Produces:

assuming destination nuxeo-client-hg
initializing destination nuxeo-client-hg repository
scanning source...
sorting...
converting...
36 trunk creation
35 moved to cmd line clients project folders
34 renamed
** unknown exception encountered, details follow
** report bug details to http://www.selenic.com/mercurial/bts
** or mercurial@selenic.com
** Mercurial Distributed SCM (version 6f6aa7f3bc1c)
Traceback (most recent call last):
  File "/home/jgoerzen/programs/hg-devel/hg", line 14, in ?
    mercurial.dispatch.run()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 20, in run
    sys.exit(dispatch(sys.argv[1:]))
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 29, in dispatch
    return _runcatch(u, args)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 45, in _runcatch
    return _dispatch(ui, args)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 348, in _dispatch
    ret = _runcommand(ui, options, cmd, d)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 401, in _runcommand
    return checkargs()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 357, in checkargs
    return cmdfunc()
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/dispatch.py",
line 342, in <lambda>
    d = lambda: func(ui, *args, **cmdoptions)
  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/__init__.py",
line 473, in convert

  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/__init__.py",
line 257, in convert

  File
"/home/jgoerzen/programs/hg-devel/build/lib.linux-i686-2.4/mercurial/__init__.py",
line 202, in copy

  File "/home/jgoerzen/no-backup/programs/hg/hgext/convert/subversion.py", line
211, in getchanges
  File "/home/jgoerzen/no-backup/programs/hg/hgext/convert/subversion.py", line
422, in expandpaths
  File "/var/lib/python-support/python2.4/libsvn/ra.py", line 480, in
svn_ra_check_path
    return apply(_ra.svn_ra_check_path, args)
libsvn._core.SubversionException: ("PROPFIND request failed on
'/org.nuxeo.ecm.client/trunk/commandline'", 175002)