selfupdate fails (couldn't execute "svn": no such file or directory)

[vinc17@…]

sudo port -v selfupdate gives the following error:

===> making install in src/programs/daemondo
mkdir -p build
/usr/bin/install -c -o root -g admin -m 555 build/daemondo /opt/local/bin
[ ! -f /opt/local/etc/macports/mp_version ] || rm -vf /opt/local/etc/macports/mp_version
/usr/bin/install -c -o root -g admin -m 444 setupenv.bash  /opt/local/share/macports/
/usr/bin/tclsh src/upgrade_sources_conf_default.tcl /opt/local
couldn't execute "svn": no such file or directory
    while executing
"while {[gets $sourcesConfChannel line] >= 0} {
   set addDefault false
   if {!$defaultSeen && ![regexp {^\s*#|^$} $line]} {
      if {[regexp {^([\w-..."
    (file "src/upgrade_sources_conf_default.tcl" line 34)
make: *** [install] Error 1

Note: I can execute svn manually without any problem.

[toby@…]

What OS are you on? What version are you updating from?

[blb@…]

Could be related to #20760.

[vinc17@…]

Replying to toby@…:

What OS are you on? What version are you updating from?

Tiger PowerPC. I'm upgrading from the previous version.

[ryandesign@…]

Duplicate of #20760.