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The error appears as follows:

ERROR: Failure expanding variable RUBY_GEM_VERSION, expression was
${@get_rubygemsversion("build/tmp/sysroots/x86_64-linux/usr/bin")}
which triggered exception TypeError: can't use a string pattern on
a bytes-like object

Adding an explicit utf-8 decode makes it work again.

Similar fixes appear in git://git.pokylinux.org/poky

 3e309e0aad
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>