Merge pull request #1082 from xaviershay/issue-863

Recommended approach for finding and verifying code that invalidates the message cache.

ignores

@@ -0,0 +1,2 @@
+lib/rspec/core/example_group.rb:        subclass = Class.new(parent)  ### This only occurs when an example group is subclasses, at spec define time.
+lib/rspec/core/example_group.rb:        # TODO 2010-05-05: Because we don't know if const_set is thread-safe ### It's a comment

method_cache_busters.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# set -x
+
+# This list is from https://charlie.bz/blog/things-that-clear-rubys-method-cache
+
+IGNORE_FILE=/tmp/cache_busters_ignore
+cat ignores | ruby -ne 'puts $_.split(/\s+###/)[0]' > $IGNORE_FILE
+
+egrep 'def [a-z]*\..*' -R lib | grep -v "def self" | grep -v -f $IGNORE_FILE
+grep undef -R lib | grep -v -f $IGNORE_FILE
+grep alias_method -R lib
+grep remove_method -R lib | grep -v -f $IGNORE_FILE
+grep const_set -R lib | grep -v -f $IGNORE_FILE
+grep remove_const -R lib | grep -v -f $IGNORE_FILE
+egrep '\bextend\b' -R lib | grep -v -f $IGNORE_FILE
+grep 'Class.new' -R lib | grep -v -f $IGNORE_FILE
+grep private_constant -R lib | grep -v -f $IGNORE_FILE
+grep public_constant -R lib | grep -v -f $IGNORE_FILE
+grep "Marshal.load" -R lib | grep -v -f $IGNORE_FILE
+grep "OpenStruct.new" -R lib | grep -v -f $IGNORE_FILE
+