[tor-bugs] #22302 [Core Tor/Chutney]: test-network.sh uses a deprecated arithmetic syntax

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#22302: test-network.sh uses a deprecated arithmetic syntax
----------------------------------+------------------------------
     Reporter:  catalyst          |      Owner:  catalyst
         Type:  defect            |     Status:  new
     Priority:  Medium            |  Milestone:  Tor: unspecified
    Component:  Core Tor/Chutney  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
----------------------------------+------------------------------
 `test-network.sh` uses a deprecated bash-specific syntax to do arithmetic.
 This fails on systems like Ubuntu and Debian that use dash instead of bash
 for `/bin/sh`.  `test-network.sh` should probably use the POSIX
 `$((arithmetic_expr))` syntax instead.

 Typical error from the log files:

 {{{
 /home/tlyu/src/tor/../chutney/tools/test-network.sh: 302: [: Illegal
 number: $[n_rounds+1]
 Completed $[n_rounds+1] of 1 verify rounds.
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22302>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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