Do not exit on SIGCHLD:

With bash 5.0, a SIGCHLD signal is sent whenever a subshell exits. The signal
numbers passed to the trap instruction in jhalfs contain SIGCHLD, and this
new behavior causes jhalfs to exit. Fix this by using names instead of numbers
for the trap, and (of course) not trapping SIGCHLD.

jhalfs

@@ -66,7 +66,9 @@ see_ya() {
 set -e
 trap see_ya 0
 trap 'simple_error "${LINENO}" "$?" "${FUNCNAME}" "${BASH_SOURCE}"' ERR
-trap 'echo -e "\n\n${RED}INTERRUPT${OFF} trapped\n" &&  exit 2'  1 2 3 15 17 18 23
+trap 'echo -e "\n\n${RED}INTERRUPT${OFF} trapped\n" &&  exit 2' \
+      HUP INT QUIT TERM # STOP stops tterminal output and does not seem to
+                        # execute the handler
 #>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 
 version="