In function do_gcc_CYGWINPORTS_patches: readarray -t patches < <(sed -e '1,/PATCH_URI="/d;/"/,$d' < "${d}"/gcc.cygport) readarray -t is a bash-4.4 feature and therefore not allowed in EAPIs 5 and 6 which use bash-4.2.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=84fc5c9d1092eeacdf29900874d83fedca5bdacc commit 84fc5c9d1092eeacdf29900874d83fedca5bdacc Author: Michael Haubenwallner <haubi@gentoo.org> AuthorDate: 2019-08-08 10:51:08 +0000 Commit: Michael Haubenwallner <haubi@gentoo.org> CommitDate: 2019-08-12 06:34:22 +0000 toolchain.eclass (do_gcc_CYGWINPORTS_patches): avoid bash-4.4ism Closes: https://bugs.gentoo.org/690686 Signed-off-by: Michael Haubenwallner <haubi@gentoo.org> eclass/toolchain.eclass | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)