Because it is useful to print the stack
when a nil pointer dereference occurs.

Fixes golang/go#73710

Change-Id: I106ea0bdd70c2a293f5ea889edef9b5ba9db2fbd
Reviewed-on: https://go-review.googlesource.com/c/sync/+/672635
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Bypass: Damien Neil <dneil@google.com>

Change-Id: I1beb9f5e759127a48c4e5ea0613a5a466886b7c5
GitHub-Last-Rev: 58038b6
GitHub-Pull-Request: #28
Reviewed-on: https://go-review.googlesource.com/c/sync/+/674815
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

Change-Id: I5cdcc5034ccd87b939a406693e97485553ab60fa
Reviewed-on: https://go-review.googlesource.com/c/sync/+/676715
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

This change reverts CL 644575, which caused panics in the f()
call after group.Go(f) to be propagated to the subsequent
group.Wait call. This caused more problems than it solved.

Also:
- preserve some of the doc comment wording of Group.Go.
- leave a "tsunami stone" comment in Group.Go.

Fixes golang/go#53757
Updates golang/go#74275
Updates golang/go#74304
Updates golang/go#74306

Change-Id: I6e3992510944db7d69c72eaf241aedf8b84e62dd
Reviewed-on: https://go-review.googlesource.com/c/sync/+/682935
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: qiu laidongfeng2 <2645477756@qq.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Sean Liao <sean@liao.dev>

By now Go 1.25.0 has been released, and Go 1.23 is no longer supported
per the Go Release Policy (see https://go.dev/doc/devel/release#policy).

For golang/go#69095.

[git-generate]
(cd . && go get go@1.24.0 && go mod tidy && go fix ./... && go mod edit -toolchain=none)

Change-Id: Ifa2b9ecc1efe475dfe4d60f41fb3ad2c63896d12
Reviewed-on: https://go-review.googlesource.com/c/sync/+/695358
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>