Tests RE behavior of ERR_EXIT

[Bart Schaefer <schaefer@brasslantern.com>]

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Changed a set of tests from success to xfail.  Anyone have ideas of
why these aren't working?

If I change the ( subshell ) constructs to use
$ZTST_testdir/../Src/zsh -fc then they all correctly exit on nonzero
status as expected.

Aside, should 'setopt err_return' in the nested function test be using
localoptions ?

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diff --git a/Test/C03traps.ztst b/Test/C03traps.ztst
index f120809a7..e3d9ea871 100644
--- a/Test/C03traps.ztst
+++ b/Test/C03traps.ztst
@@ -720,14 +720,15 @@ F:Must be tested with a top-level script rather than source or function
 0:ERR_RETURN in "else" branch in nested function
 >Good
 
+  unsetopt err_return	# "leaked" from previous test
   (setopt err_exit
   for x in y; do
     false && true
   done
   print OK
   )
-0:ERR_EXIT not triggered by status 1 at end of for
->OK
+1f:ERR_EXIT triggered by status 1 at end of for
+F:This fails to exit for unknown reasons and prints OK
 
   (setopt err_exit
   integer x=0
@@ -736,8 +737,8 @@ F:Must be tested with a top-level script rather than source or function
   done
   print OK
   )
-0:ERR_EXIT not triggered by status 1 at end of while
->OK
+1f:ERR_EXIT triggered by status 1 at end of while
+F:This fails to exit for unknown reasons and prints OK
 
   (setopt err_exit
   repeat 1; do
@@ -745,8 +746,8 @@ F:Must be tested with a top-level script rather than source or function
   done
   print OK
   )
-0:ERR_EXIT not triggered by status 1 at end of repeat
->OK
+1f:ERR_EXIT triggered by status 1 at end of repeat
+F:This fails to exit for unknown reasons and prints OK
 
   (setopt err_exit
   if true; then
@@ -754,8 +755,8 @@ F:Must be tested with a top-level script rather than source or function
   fi
   print OK
   )
-0:ERR_EXIT not triggered by status 1 at end of if
->OK
+1f:ERR_EXIT triggered by status 1 at end of if
+F:This fails to exit for unknown reasons and prints OK
 
   (setopt err_exit
   {
@@ -763,8 +764,8 @@ F:Must be tested with a top-level script rather than source or function
   }
   print OK
   )
-0:ERR_EXIT not triggered by status 1 at end of { }
->OK
+1f:ERR_EXIT triggered by status 1 at end of { }
+F:This fails to exit for unknown reasons and prints OK
 
   unsetopt err_exit err_return
   (setopt err_exit