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-->###Steps to reproduce<!--- When reporting a defect, specify the scenario that reproduces the problem -->
```js
esprima.parse('some code')
```
###Expected output<!--- When reporting a defect, write what should happen, e.g. a particular AST output --><!--- When suggesting an improvement, describe how it should work -->###Actual output<!--- When reporting a defect, write what actually happens instead of the expected behavior --><!--- When suggesting an improvement, explain the difference from current behavior -->###Relevant references<!--- Optionally, include as many relevant references, e.g. the ECMAScript specification. -->