Fix throw when creating exception object in Safari
Fix throw when creating exception object in Safari

https://github.com/jquery/esprima/issues/1290
gautamkrishnar/handlebars.js,mosoft521/handlebars.js,handlebars-lang/handlebars.js,jbboehr/handlebars.js,gautamkrishnar/handlebars.js,jbboehr/handlebars.js,handlebars-lang/handlebars.js,wycats/handlebars.js,wycats/handlebars.js,handlebars-lang/handlebars.js,wycats/handlebars.js,mosoft521/handlebars.js,handlebars-lang/handlebars.js,gautamkrishnar/handlebars.js,wycats/handlebars.js,handlebars-lang/handlebars.js,mosoft521/handlebars.js,wycats/handlebars.js,mosoft521/handlebars.js,mosoft521/handlebars.js,jbboehr/handlebars.js