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-rwxr-xr-xshell/hush_test/hush-psubst/falsetick.tests22
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diff --git a/shell/hush_test/hush-psubst/falsetick.tests b/shell/hush_test/hush-psubst/falsetick.tests
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--- /dev/null
+++ b/shell/hush_test/hush-psubst/falsetick.tests
@@ -0,0 +1,22 @@
+# Exitcode 0 (`` has no exitcode, but assignment has):
+true; a=``; echo $?
+false; a=``; echo $?
+true; a=$(); echo $?
+false; a=$(); echo $?
+# Exitcode 2 (`cmd` expansion sets exitcode after assignment set it to 0):
+true; a=`exit 2`; echo $?
+false; a=`exit 2`; echo $?
+true; a=$(exit 2); echo $?
+false; a=$(exit 2); echo $?
+# Exitcode 1 (redirect sets exitcode to 1 on error after them):
+true; a=`` >/does/not/exist; echo $?
+false; a=`` >/does/not/exist; echo $?
+true; a=$() >/does/not/exist; echo $?
+false; a=$() >/does/not/exist; echo $?
+true; a=`exit 2` >/does/not/exist; echo $?
+false; a=`exit 2` >/does/not/exist; echo $?
+true; a=$(exit 2) >/does/not/exist; echo $?
+false; a=$(exit 2) >/does/not/exist; echo $?
+# ...and assignment still happens despite redirect error:
+true; a=$(echo b) >/does/not/exist; echo $?
+echo "Done: a=$a"