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: ${THIS_SH:=./bash}
readonly x=4
# in posix mode, these are all variable assignment errors, so strict conformance
# implies that we exit after any of them. ksh93 doesn't do that. we more-or-less
# emulate the ksh93 behavior
x=8 notthere
echo after no such command: $?
x=8 echo echo builtin
echo after non-special builtin: $?
( x=8 : nosuchdir
echo after special builtin: $? )
( x=8 $nocmd
echo after assignment error: $? )
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