hush: fix "export not_yet_defined_var", fix parsing of "cmd | }"

 corner case; improve hush_leaktool.sh;
 fix some false positives in testsuite

function                                             old     new   delta
builtin_export                                       191     206     +15
parse_stream                                        2196    2200      +4

2 files changed, 3 insertions, 0 deletions

diff --git a/shell/hush_test/hush-trap/catch.right b/shell/hush_test/hush-trap/catch.right
index 9e34c4c49..80a062c4b 100644
--- a/shell/hush_test/hush-trap/catch.right
+++ b/shell/hush_test/hush-trap/catch.right
@@ -2,3 +2,4 @@ sending USR2
 caught
 sending USR2
 sending USR2
+USR2
diff --git a/shell/hush_test/hush-z_slow/leak_all1.tests b/shell/hush_test/hush-z_slow/leak_all1.tests
index 21fdb0d1e..17ce0c6fa 100755
--- a/shell/hush_test/hush-z_slow/leak_all1.tests
+++ b/shell/hush_test/hush-z_slow/leak_all1.tests
@@ -67,6 +67,7 @@ HERE
     f >/dev/null
     : $((i++))
 done
+unset -f f
 
 memleak
 
@@ -133,6 +134,7 @@ HERE
     f >/dev/null
     : $((i++))
 done
+unset -f f
 
 
 memleak