Personally, I like the look (and simplicity) of ECMA6 / TypeScript without semi-colons. The only problem is that there are some known danger-zones with automatic semi-colon insertion. Could we have compiler warnings to prevent these from slipping through the cracks?

Example:

function dangerous(): string { return "watch the semi-colons!" } dangerous()

Compiles to the following with no warnings or compiler errors (even though the function actually doesn't return a string):

function dangerous() { return; "watch the semi-colons!"; } dangerous();

This specific case is kind of scary / annoying, but it might be worth looking into others.

Thoughts?