19575: Fix problem with trap on EXIT overriding status

1 files changed, 16 insertions, 0 deletions

diff --git a/Test/C03traps.ztst b/Test/C03traps.ztst
index 81ef38a30..26ba73da5 100644
--- a/Test/C03traps.ztst
+++ b/Test/C03traps.ztst
@@ -196,3 +196,19 @@
   f
   functions TRAPWINCH
 1:Unsetting ordinary traps with localtraps.
+
+#
+# Returns from within traps are a perennial problem.
+# The following two apply to returns in and around standard
+# ksh-style traps.  The intention is that a return value from
+# within the function is preserved (i.e. statuses set by the trap
+# are ignored) unless the trap explicitly executes `return', which makes
+# it return from the enclosing function.
+#
+  fn() { trap 'true' EXIT; return 1; }
+  fn
+1: ksh-style EXIT traps preserve return value
+
+  inner() { trap 'return 3' EXIT; return 2: }
+  outer() { inner; return 1; }
+3: ksh-style EXIT traps can force return status of enclosing function