1 files changed, 40 insertions, 0 deletions
diff --git a/shell/hush_test/hush-vars/param_expand_indicate_error.tests b/shell/hush_test/hush-vars/param_expand_indicate_error.tests
new file mode 100755
index 000000000..6b431d311
--- /dev/null
+++ b/shell/hush_test/hush-vars/param_expand_indicate_error.tests
@@ -0,0 +1,40 @@
+# do all of these in subshells since it's supposed to error out
+
+# first try some invalid patterns
+hush -c 'echo ${?}'
+hush -c 'echo ${:?}'
+
+# then some funky ones
+hush -c 'echo ${#?}'
+hush -c 'echo ${#:?}'
+
+# now some valid ones
+hush -c 'set --; echo _$1'
+hush -c 'set --; echo _${1?}'
+hush -c 'set --; echo _${1:?}'
+hush -c 'set --; echo _${1?word}'
+hush -c 'set --; echo _${1:?word}'
+
+hush -c 'set -- aaaa; echo _$1'
+hush -c 'set -- aaaa; echo _${1?}'
+hush -c 'set -- aaaa; echo _${1:?}'
+hush -c 'set -- aaaa; echo _${1?word}'
+hush -c 'set -- aaaa; echo _${1:?word}'
+
+hush -c 'unset f; echo _$f'
+hush -c 'unset f; echo _${f?}'
+hush -c 'unset f; echo _${f:?}'
+hush -c 'unset f; echo _${f?word}'
+hush -c 'unset f; echo _${f:?word}'
+
+hush -c 'f=; echo _$f'
+hush -c 'f=; echo _${f?}'
+hush -c 'f=; echo _${f:?}'
+hush -c 'f=; echo _${f?word}'
+hush -c 'f=; echo _${f:?word}'
+
+hush -c 'f=fff; echo _$f'
+hush -c 'f=fff; echo _${f?}'
+hush -c 'f=fff; echo _${f:?}'
+hush -c 'f=fff; echo _${f?word}'
+hush -c 'f=fff; echo _${f:?word}'