add missing function crash test (re: 6193c6a3)

Of course I was wrong to say the bug had nothing to do with
functions; traps in ksh functions are local, are handled the same
way as traps that are local to virtual subshells, and had the same
crashing bug. So this adds a test for that as well.

src/cmd/ksh93/tests/functions.sh

@@ -1306,5 +1306,22 @@ actual=$(
 [[ $actual == "$expect" ]] || err_exit "wrong exit status from function invoked by command substitution" \
 	"(expected $(printf %q "$expect"), got $(printf %q "$actual"))"
 
+# ======
+# https://bugzilla.redhat.com/1117404
+
+cat >$tmp/crash_rhbz1117404.ksh <<-'EOF'
+	trap "" HUP			# trigger part 1: signal ignored in main shell
+	function ksh_fun
+	{
+		trap ": foo" HUP	# trigger part 2: any local trap (empty or not) on same signal in ksh function
+	}
+	for((i=0; i<2500; i++))
+	do	ksh_fun
+	done
+EOF
+got=$( { "$SHELL" "$tmp/crash_rhbz1117404.ksh"; } 2>&1)
+((!(e = $?))) || err_exit 'crash while handling function-local trap' \
+	"(got status $e$( ((e>128)) && print -n / && kill -l "$e"), $(printf %q "$got"))"
+
 # ======
 exit $((Errors<125?Errors:125))

src/cmd/ksh93/tests/subshell.sh

@@ -852,7 +852,6 @@ actual=`get_value`
 
 cat >$tmp/crash_rhbz1117404.ksh <<-'EOF'
 	trap "" HUP			# trigger part 1: signal ignored in main shell
-	i=0
 	for((i=0; i<2500; i++))
 	do	(trap ": foo" HUP)	# trigger part 2: any trap (empty or not) on same signal in subshell
 	done