torrc's SocksSocket breaks tor-service-defaults-torrc's SocksPort

Related: legacy/trac#12585 (moved)

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Operating system: Debian wheezy

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Version:

Tor v0.2.6.4-rc (git-b7090ba4fb85d8ac) running on Linux with Libevent 2.0.19-stable, OpenSSL 1.0.1e and Zlib 1.2.7.

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This is my /usr/share/tor/tor-service-defaults-torrc:

DataDirectory /var/lib/tor
PidFile /var/run/tor/tor.pid
RunAsDaemon 1
User debian-tor

ControlSocket /var/run/tor/control
ControlSocketsGroupWritable 1

CookieAuthentication 1
CookieAuthFileGroupReadable 1
CookieAuthFile /var/run/tor/control.authcookie

Log notice file /var/log/tor/log

## (A) not working
SocksPort 9102

All instances are defaults that come with Debian. Only SocksPort 9102 was added by me.

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This is my very minimal /etc/tor/torrc to keep this report simple:

## (B) works
#SocksPort 9102

## (C)
SocksSocketsGroupWritable 1
## (D)
SocksPort unix:/var/run/tor/socket

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Legend:

• enabled -> commented in
• disabled -> commented out

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Result:

When (A) SocksPort 9102 is enabled, and (D) SocksPort unix:/var/run/tor/socket is disabled, then 127.0.0.1 9102 is reachable.

When (A) SocksPort 9102 is enabled, and (B) SocksPort 9102 is disabled, and (D) SocksPort unix:/var/run/tor/socket is enabled, then 127.0.0.1 9102 is unreachable.

When (A) and (B) SocksPort 9102 is enabled, and (D) SocksPort unix:/var/run/tor/socket is enabled, then 127.0.0.1 9102 is reachable.

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Expected result:

If SocksPort 9102 is set in /usr/share/tor/tor-service-defaults-torrc and SocksPort unix:/var/run/tor/socket is set in /etc/tor/torrc, then the SocksSocket should not interfere with SocksPort 9102.