docker_container: improve port range parsing error behavior (#61740)

* Improve port range parsing.

* Add changelog.

changelogs/fragments/61740-docker_container-port-range-parsing.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- "docker_container - improve error behavior when parsing port ranges fails."

lib/ansible/modules/cloud/docker/docker_container.py

@@ -1078,12 +1078,18 @@ def parse_port_range(range_or_port, client):
     Returns a list of integers for each port in the list.
     '''
     if '-' in range_or_port:
+        try:
             start, end = [int(port) for port in range_or_port.split('-')]
+        except Exception:
+            client.fail('Invalid port range: "{0}"'.format(range_or_port))
         if end < start:
-            client.fail('Invalid port range: {0}'.format(range_or_port))
+            client.fail('Invalid port range: "{0}"'.format(range_or_port))
         return list(range(start, end + 1))
     else:
+        try:
             return [int(range_or_port)]
+        except Exception:
+            client.fail('Invalid port: "{0}"'.format(range_or_port))
 
 
 def split_colon_ipv6(text, client):