This is with subversion-1.6.15 and subvertpy-0.7.5.
Here is the PDB output:

(Pdb) print dirents
{'reconnect-clock-3859': {}, 'manhole-logging-1439': {}, 'web2-tap-tests-3051': {},
'dependancy-list-967': {}, 'dav-take-two-3081-1': {},
'vfs-async-backends-2815': {}, 'configure-log-observer-638-2': {},
'dav-take-two-3081-4': {}, 'win32Scripts-2381': {}, 'vfs-au-sprint':
{}, 'http-11-2951': {}, 'xmlrpc-docs-1549': {}, 'web-concerns-2983-2':
{}, 'manyprocesses-3404': {}, 'web2-connectionlost-3083-2': {},
'make-some-rpms-1696': {}, 'ifilepath-2176-2': {},
'suppress-warnings-3639': {}, 'compressed-logfiles-727': {},
'deferred-render-3711': {}, 'expressive-http-client-886-3': {},
'abortConnection-78': {}, 'endpoints-1442-2': {}, 'child-args-3169':
{}, 'connect-error-2454-2': {}, 'foom': {}, 'null-thingies-3329': {},
'lore-readme-3409': {}, 'trial-tutorial-2443-2': {},
'deferredlist-docs-3595': {}, 'cftp-setUp-2740': {},
'skip-if-ssl-missing-3852': {}, 'isupport-3285-2': {},
'ftp-test-cleanup-1368-2': {}, 'signal-process-group-2726-3': {},
'make-zshcomp-dynamic-3078-2': {}, 'faster-domish-serialization-2477':
{}, 'connectSSH-1975': {}, 'msn-not-etc-702': {}, 'refactor_gi-3729':
{}, 'trial-stale-pyc-2036': {}, 'overview-graph-1712': {},
'event-waker-1250': {}, 'separate-format-method-3760': {},
'loopback-recursion-2564': {}, 'modal-3902': {}, 'osx-installer-3279':
{}, 'memcache-get-multiple-3171': {}, 'web2-scgi-typo-2167': {},
'zshcomp-remove-3078': {}, 'web2-access-2734': {}, 'java-1960': {},
'switchuid-current-3172': {}, 'initgroups-self-uid-3172-2': {},
'disttrial-1784-6': {}, 'conch-test-skips-3916': {},
'create-socket-2638': {}, 'dav-2518bis-1776': {}, '--omg-optimized-2':
{}, 'syntaxerror-failure-3255': {}, 'newstream-1937-3': {},
'im-docstring-2458': {}, 'urlpath-2093': {}, 'dsa-key-failure-3391-2':
{}, 'faster-string-receivers-2611': {},
'conch-client-disconnect-3466': {}, 'dav-acl-1608-4': {},
'twisted-web-docs-892': {}, 't.w.static.File-multiple-ranges-3574-2':
{}, 'ireporter-2164-6': {}, 'web2-DirectoryLister-1587': {},
'ssh-connection-lost-3007': {}, 'vfs-twistd-plugin-2821-2': {},
'iterative-deferreds-411': {}, 'win32-proc-missing-2838': {},
'selectreactor-1228': {}, 'dont-pause-a-pull-producer-3919': {},
'generic-sasl-2015-2': {}, 'follow-relative-redirects-3384': {},
'twistd-logging-638-2': {}, 'trial-temp-2589': {},
'filepath-open-flags-3123': {}, 'iocp-tcp-large-write-3233': {},
'cdefer-2245-4': {}, 'shebang-std-3768-2': {}, 'isupport-3285': {},
'web2-log-fileaccesslogfile-2843': {}, 'examples-reactor-run-3834':
{}, 'run-plugin-1490-2': {}, 'twistd-wait-823-2': {},
'twistd-web-2271': {}, 'proxy-via-header-1149': {},
'remove-async-howto-2719': {}, 'cancel-990-2': {}, 'jython-3413': {},
'moduleforfilename-2822-2': {}, 'svn-wc-version-3905': {},
'scheduling-doc-3175': {}, 'conch-perf-bug-experiment': {},
'mockos-3832': {}, 'coop-2712-5': {}, 'web2-processors-2963': {},
'26signal-3256': {}, 'trialout-2365': {}, 'lore-index-2526-2': {},
'udp-wouldblock-2790': {}, 'sip-messageparser-3583': {},
'twistd-syslog-3300': {}, 'deprecation-tool-3266-3': {},
'unsigned-id-delayed-call-3791': {}, 'remove-Defer-setTimeout-1702':
{}, 'slowecho-3861': {}, 'dismantle-session-branch-3898': {},
'run-single-test-2737': {}, 'session-signal-2687': {},
'path-importer-cache-inconsistency-3913': {},
'ftprealm-custompath-2179': {}, 'settimeout-1702-3': {},
'imap-howto-536': {}, 'no-newline-opaque-3693': {}, 'cfreactor-1833':
{}, 'conch-tap-fix-3871-2': {}, 'no-streams-1937': {},
'session-2710-9': {}, 'waitpid-2967': {}, 'core-dropin-3722': {},
'netflow-3166': {}, 'finger-components-jump-532-2': {},
'lore-svg-3093': {}, 'static-web-3907': {},
'no-usernamehashedpassword-3648': {}, 'releases': {},
'process-kill-2420': {}, 'devdocs-2459': {},
'verified_fakerequest-3091': {}, 'inotify-support-972-2': {},
'scripts-3526': {}, 'win32-proc-handle-close-3893': {},
'getchild-web-3465': {}, 'customize-tbformat-2666': {},
'patch-not-present-3162': {}, 'web2-new-stream-1937-2': {},
'simple-app-2205-2': {}, 'reactor-basics-2722': {},
'web2-client-connectionlost-loop-3207': {},
'pdf-bound-documentation-1830-3': {}, 'filepath-symlink-cycle-3911':
{}, 'open-tty-3181': {}, 'callLater-1396-3': {}, 'erlang-amp-1961':
{}, 'modules-so-2871': {}, 'aggregate-news-3199': {},
'benchmarks-3754': {}, 'disconnected-memcache-3643-3': {},
'finger19-cleanup-532': {}, 'shebang-std-3768': {},
'openid-support-2965': {}, 'limit-allowed-methods-446': {},
'deferred-pb-2555': {}, 'imap4-search-1977': {}, 'libevent-1930-4':
{}, 'free-assert-2112-3': {}, 'fastcgi-typo-1915': {},
'writing-servers-3772': {}, 'xmpp_client.py-3270': {},
'process-cleanup-loop-3398': {}, 'deferredlock-fifo-3082': {},
'sip-transactions-3584-3': {}, 'test-write-sequence-745-3': {},
'win-filepath-2366-2': {}, 'memcache-server-2914': {},
'windows-getsockname-3831': {}, 'loopingcall-3671': {},
'sendfile-585-3': {}, 'twisted-man-signals-689': {},
'fastcgi-client-1446-2': {}, 'pb-logout-test-gc-collect-3566': {},
'memcache-binary-3921': {}, 'popen-compatibility-733-2': {},
'chat-proxy-1974': {}, 'banana-spec-3875': {},
'tcp-test-posixbase-3677': {}, 'kqreactor-1918-2': {},
'ctcp-version-3660-2': {}, 'xmpp-s2s-2320-4': {},
'manhole-linewrap-2637-2': {}, 'trial-tmp-marker-3481': {},
'notallowed-3678': {}, 'news-generator-2884-2': {}, 'tcp-ipv6-3014':
{}, 'anonymous-guard-3924': {}, 'calldeprecated-message-3047': {},
'py-version-support-2541': {}, 'filepath-setcontent-2931-3': {},
'spwd-3242-2': {}, 'spwd-3242-3': {}, 'rename-private-result-3846':
{}, 'sip-uri-3582': {}, 'cftp-without-shell-3914': {},
'conch-agent-deprecations-3813': {}, 'closed-socket-1537-5': {},
'twistd-options-2571': {}, 'deferred-slots-3245': {},
'alternate-dsa-key-3630': {}, 'socksv4a-3886': {}}