List.removeAt throws TypeError, not ArgumentError

[DartBot]

This issue was originally filed by alexe.kaigorodov@gmail.com

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The description of List.removeAt(int index) reads:

    Throws an ArgumentError if index is not an int.

But for lists created by new List() or new List(size), TypeError is thrown if index is not an int.

Affected test:
co19/src/LibTest/core/List/removeAt_A02_t01.dart

[lrhn]

We should remove that line and just say something like "It is an error if [index] is not in the range 0 .. this.length."

It's already typed as an int, so it's obviously an error if it's not assignable to int. We just need to rule out null and negative/too big integers.

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Added Area-Library, Library-Core, Triaged labels.

[floitschG]

Except that the documentation guys don't like "It is an error". So it should say "The argument [index] must be an integer in the range 0 .. this.length" (or similar.

[lrhn]

Set owner to @lrhn.
Added Started label.

[lrhn]

Added Fixed label.