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+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+: ${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: $? )