I agree that 10 is wrong, but reading both AS and JS doc, I'm now thinking that if the second argument is missing that the compiler should use 0.
Please see the note in the comment of this ticket[1]: We need to decide whether we should add undefined as the second param (it seems this is the preferred option by GCC instead of zero, I am not sure why other than that they specify it) or possibly use the GCL version of parseInt in these cases for full backwards compatibility with older browsers. What are your thoughts about this? 1. https://issues.apache.org/jira/browse/FLEX-35283?focusedCommentId=15932208&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15932208
