Installing Tk with perl 5.26.1 on Ubuntu 18.04: Failed test 'wm deiconify embedded window'

[hakonhagland]

Hi, I would like to report a test failure for Tk-804.034. I am using perl version 5.26.1 on Ubuntu 18.04.

$ cpanm Tk
[...]
t/trace1.t ................... ok
t/unicode.t .................. ok
t/widget.t ................... ok

#   Failed test 'wm deiconify embedded window'
#   at t/wm-tcl.t line 685.
#                   ''
#     doesn't match '(?^:can\'t\ deiconify\ \.embed\:\ it\ is\ an\ embedded\ window)'

#   Failed test at t/wm-tcl.t line 915.
#                   ''
#     doesn't match '(?^:can\'t\ iconify\ \.toplevel2\:\ it\ is\ an\ embedded\ window)'

#   Failed test 'An embedded toplevel does not appear in the stacking order'
#   at t/wm-tcl.t line 1827.
#     Structures begin differing at:
#          $got->[1] = '.embd'
#     $expected->[1] = '.real'
# Looks like you failed 3 tests of 315.
t/wm-tcl.t ...................
Dubious, test returned 3 (wstat 768, 0x300)
Failed 3/315 subtests
        (less 57 skipped subtests: 255 okay)
        (21 TODO tests unexpectedly succeeded)
[...]

The complete build log file is available here:
build.log