Fixes the test not to freeze on HHVM

This resolves #475
minor #491 Fixes the test not to freeze on HHVM (Nyholm)

This PR was merged into the 0.5.x-dev branch.

Discussion
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Fixes the test not to freeze on HHVM

This resolves #475

Commits
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a564c30 Fixes the test not to freeze on HHVM
Merge branch 'master' into structure_braces