plugin: tls handshake panic: unreachable method called. linker bug? [1.17 backport]

[gopherbot]

@zhouguangyuan0718 requested issue #51621 to be considered for backport to the next 1.17 minor release.

Well, it's ingenious. Maybe we need a backport to 1.17 and 1.18?
@gopherbot please open a backport issue.

[toothrot]

Approved. This fixes a valid-usecase of plugins with a trivial targeted fix.

[gopherbot]

Change https://go.dev/cl/397484 mentions this issue: [release-branch.go1.17] cmd/link: mark unexported methods for plugins

[gopherbot]

Closed by merging eb75219 to release-branch.go1.17.