net/http/pprof: avoid panic with user-defined "GET /" route
With the new routing style in go 1.22, declaring
http.Handle("GET /", h)
generates a conflict with route "/debug/pprof/" and the others declared in
the net/http/pprof package. You get an error such as:
panic: pattern "GET /" (registered at .../pprof.go:94): GET / matches
fewer methods than /debug/pprof/, but has a more general path pattern
This patch prevents that error. Adding GET is correct because no other
method makes sense with the /debug/pprof routes. However, a tool using any
method other than GET will break.
We preserve the traditional behaviour when GODEBUG=httpmuxgo121=1 is
specified.
Updates #65723
Change-Id: I49c21f5f3e802ad7538062d824354b2e4d8a800e
GitHub-Last-Rev:
35e4012663f454fee8f00a321c43592ce4754feb
GitHub-Pull-Request: golang/go#65791
Reviewed-on: https://go-review.googlesource.com/c/go/+/565176
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>