Fix a problem where plain functions can't be used as helper if they are not passed through the strict mode context object #1389
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While working on emberjs/ember.js#20052 I noticed that an error was thrown when using a function that was stored on a component class property. The
hasInternalHelperManager
util is used there but it doesn't pass through the default helper manager fallback behavior code so it returns false and the error is shown.It seems functions passed as strict mode context values follow a different code path than component arguments and class properties so the error wasn't shown in the tests of the original PR.