GMLive.js: inaccurate string negation

[Miepee]

Apologies if this is the wrong repo, didn't know where else to put it.
On GMLive.js I tried the following snippet:

var c = 0;
var c = "b" + "a" + (-"a") + "a";
trace(c);

Running that snippet causes baNaNa to get printed.
However, the GM compiler doesn't actually compile this:

GMLive should thus also fail and cause an error.

[YellowAfterlife]

GMLive.js mimics GM:S HTML5 behaviour circa 2015, which prioritized performance over edge cases. It doesn't support 64-bit integers for the same reason.

There will be a new GMLive.js version that's closer to GMLive.gml sometime this or next year, depending on how often I'll have electricity during winter.