gopls: update go.mod file for gopls/v0.7.4-pre.1

Change-Id: Ife4bdbe1b812b47e5968c9eae666eb4145cd2f53
Reviewed-on: https://go-review.googlesource.com/c/tools/+/370658
Trust: Robert Findley <[email protected]>
Run-TryBot: Robert Findley <[email protected]>
gopls-CI: kokoro <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Hyang-Ah Hana Kim <[email protected]>

internal/memoize: do not allow (*Generation).Acquire to fail

The Acquire method is nearly instantaneous; it only potentially blocks
on a small, constant sequence of cache misses, so there is no need to
avoid blocking in it when a Context is cancelled.

An early return when the passed-in Context is canceled was added in CL
242838 to avoid incrementing the Generation's WaitGroup after its
destruction has begun; however, that early return also bypasses the
WaitGroup accounting that blocks Destroy while the generation is still
in use. Instead, we need the invariant that Acquire is not called in
the first place after Destroy, which we can ensure by nilling out
the View's snapshot when we begin destroying it.

I was not able to reproduce golang/go#48774 locally, but I believe
that this CL will fix it. (It may, however, expose other races or
deadlocks that may have been masked by the early return, which we can
then fix separately.)

Fixes golang/go#48774

Change-Id: Iac36fceb06485f849da5ba0250b44b55f937c44b
Reviewed-on: https://go-review.googlesource.com/c/tools/+/367675
Trust: Bryan C. Mills <[email protected]>
Run-TryBot: Bryan C. Mills <[email protected]>
gopls-CI: kokoro <[email protected]>
Reviewed-by: Robert Findley <[email protected]>
TryBot-Result: Go Bot <[email protected]>

internal/typeparams: hide go1.18 API usage behind a build constraint

Temporarily hide usage of the new go/types API, so that we can safely
tag x/[email protected] without risk of further breakage when these APIs
change.

Updates golang/go#48632

Change-Id: Idba02d09644622b3d973a684a76514c86eefa17f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/352854
Trust: Robert Findley <[email protected]>
Run-TryBot: Robert Findley <[email protected]>
Reviewed-by: Rebecca Stambler <[email protected]>
gopls-CI: kokoro <[email protected]>
TryBot-Result: Go Bot <[email protected]>

gopls/api-diff: create api-diff command for gopls api

This change adds a command that can be used to see the difference in
API between two gopls versions. It prints out the changes in a way that
can be copy-pasted into the release notes.

Also, only run the copyright test with 1.18. I wanted to do this before
to use filepath.WalkDir, but now it also doesn't work with generic
syntax (it doesn't use packages.Load, so doesn't respect build tags).

Fixes golang/go#46652

Change-Id: I3670e0289a8eeaca02f4dcd8f88f206796ed2462
Reviewed-on: https://go-review.googlesource.com/c/tools/+/327276
Trust: Rebecca Stambler <[email protected]>
Run-TryBot: Rebecca Stambler <[email protected]>
gopls-CI: kokoro <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Robert Findley <[email protected]>