Throw error if you add a custom matcher or equality outside of a runnable

[#66789174]

src/core/Env.js

@@ -42,10 +42,16 @@ getJasmineRequireObj().Env = function(j$) {
     };
 
     this.addCustomEqualityTester = function(tester) {
+      if(!currentRunnable()) {
+        throw new Error('Custom Equalities must be added in a before function or a spec');
+      }
       runnableResources[currentRunnable().id].customEqualityTesters.push(tester);
     };
 
     this.addMatchers = function(matchersToAdd) {
+      if(!currentRunnable()) {
+        throw new Error('Matchers must be added in a before function or a spec');
+      }
       var customMatchers = runnableResources[currentRunnable().id].customMatchers;
       for (var matcherName in matchersToAdd) {
         customMatchers[matcherName] = matchersToAdd[matcherName];