cmd/compile: completion of outstanding issues for generics [freeze exception]

[griesemer]

There is still quite a bit of work to do on the type checker side (cmd/compile/internal/types2) and possibly the compiler back-end side related to the generics release. A freeze scheduled for Nov 1. 2021 will require us to drop some essential work that needs to be done for generics.

I like to request a freeze exception of two weeks for generics-related work in the compiler, for a freeze on Monday Nov. 15, 2021.

This should include work on the type-checkers (incl. import/export data readers/writers), and possibly the compiler back-end. Please note that we are maintaining two type-checkers in lock-step, cmd/compile/internal/types2 and go/types. Type-checking work may happen in any of those and then is ported essentially 1:1 (but for adjustments due to different AST representations and error handling).

cc: @heschi @toothrot

[heschi]

cc @golang/release

[dmitshur]

Thank you for letting us know. We have discussed this on the team and agreed that this exception is okay to make for 1.18, especially since this is a part of overall generics work that is in scope of 1.18.

Freeze exception approved.

(I'll close this since I understand the mentioned work is already tracked in other issues; otherwise, feel free to keep this open if it's helpful.)