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-rwxr-xr-xplugins/sudoers/regress/visudo/test2.sh17
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diff --git a/plugins/sudoers/regress/visudo/test2.sh b/plugins/sudoers/regress/visudo/test2.sh
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+++ b/plugins/sudoers/regress/visudo/test2.sh
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+#!/bin/sh
+#
+# Test cycle detection
+# Prior to sudo 1.8.6p5 this resulted in a core dump (stack smash)
+# The names of the aliases (or rather their lexical order) is important.
+#
+
+: ${VISUDO=visudo}
+
+$VISUDO -csf - <<EOF
+User_Alias YYY = FOO
+User_Alias XXX = nobody
+User_Alias FOO = XXX, YYY
+FOO ALL = ALL
+EOF
+
+exit 0