[MacPorts] #58878: netpbm @10.87.01_0: Destroot failed, backslash in group name

[MacPorts]

#58878: netpbm @10.87.01_0: Destroot failed, backslash in group name
---------------------------+------------------------
  Reporter:  Dave-Allured  |      Owner:  ryandesign
      Type:  defect        |     Status:  reopened
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  haspatch
      Port:  netpbm        |
---------------------------+------------------------

Comment (by Dave-Allured):

 Replying to [comment:11 ryandesign]:
 > What does it say in
 /Volumes/RM1_Homes/dallured/port/mp/libexec/macports/lib/port1.0/port_autoconf.tcl
 for `variable install_group`? Maybe it has been recorded incorrectly
 there.

 No, that one is correct.  I checked carefully; there is no hidden binary
 code in that string.
 {{{
 variable install_group "PSD\rain"
 }}}
 Notice in yesterday's `libnetpbm.main.log` (above), that the group name
 was misinterpreted at one point, somewhere inside TCL.  The "r" character
 following backslash was treated as if it was backslash escaped, i.e. `\r`,
 therefore interpreted as the `<cr>` control character.  Also the original
 backslash was left in place, making this an incorrect escape conversion.
 Surprisingly, this unwanted conversion was NOT done consistently.  Notice
 the second message line, for example.  (I had to replace the <cr>
 character in the first line, for legible display in this Trac message.)
 {{{
 :debug:destroot system: chown -R dallured:PSD\<cr>ain
 /Volumes/RM1_Homes/dallured/port/mp/var/macports/build/_Volumes_RM1_Homes_dallured_port_mp_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_netpbm/libnetpbm/work/destroot
 :info:destroot chown: PSD\rain: illegal group name
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58878#comment:13>
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