net/http: Connection to HTTP/2 site with IdleConnTimeout hangs [1.13 backport]

[gopherbot]

@bradfitz requested issue #34387 to be considered for backport to the next 1.13 minor release.

@gopherbot, please backport to Go 1.13.

(I'm assuming.)

[bcmills]

In #34387 (comment), @fraenkel notes:

It's a regression. It is a bit difficult to come up with a good set of tests to cover the connection management between the http and http2 side.

[bcmills]

@fraenkel, if you would like this to be backported, please send a cherry-pick CL per https://github.com/golang/go/wiki/MinorReleases#making-cherry-pick-cls.

(On the other hand, if you don't think it's a good backport candidate after all, please let us know or close this issue.)

[gopherbot]

Change https://golang.org/cl/197377 mentions this issue: [release-branch.go1.13] net/http: remove http2 connections when no longer cached

[gopherbot]

Closed by merging 44a4250 to release-branch.go1.13.