Recompile all regexes.

Compiled regexes are endianness-specific. To run on any endianness
systems we need to recompile them in runtime.

deps/rabbitmq_cli/lib/rabbitmq/cli/core/listeners.ex

@@ -179,7 +179,8 @@ defmodule RabbitMQ.CLI.Core.Listeners do
     # This simplistic way of distinguishing IPv6 addresses,
     # networks address ranges, etc actually works better
     # for the kind of values we can get here than :inet functions. MK.
-    case value =~ ~r/:/ do
+    regex = Regex.recompile!(~r/:/)
+    case value =~ regex do
       true -> "[#{value}]"
       false -> value
     end

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/help_command.ex

@@ -290,8 +290,8 @@ short            | long          | description
     end
   end
 
-  defp strip_rabbitmq_prefix(value) do
-    Regex.replace(~r/^rabbitmq_/, value, "")
+  defp strip_rabbitmq_prefix(value, regex) do
+    Regex.replace(regex, value, "")
   end
 
   defp format_known_plugin_name_fragments(value) do
@@ -310,9 +310,11 @@ short            | long          | description
   end
 
   defp plugin_section(plugin) do
+    regex = Regex.recompile!(~r/^rabbitmq_/)
+
     to_string(plugin)
     # drop rabbitmq_
-    |> strip_rabbitmq_prefix()
+    |> strip_rabbitmq_prefix(regex)
     |> String.split("_")
     |> format_known_plugin_name_fragments()
   end

deps/rabbitmq_cli/lib/rabbitmq/cli/diagnostics/diagnostics_helpers.ex

@@ -15,7 +15,8 @@
 
 defmodule RabbitMQ.CLI.Diagnostics.Helpers do
   def check_port_connectivity(port, node_name, timeout) do
-    hostname = Regex.replace(~r/^(.+)@/, to_string(node_name), "") |> to_charlist
+    regex = Regex.recompile!(~r/^(.+)@/)
+    hostname = Regex.replace(regex, to_string(node_name), "") |> to_charlist
 
     try do
       case :gen_tcp.connect(hostname, port, [], timeout) do