cmd/go: TestScript/get_insecure_env failure due to 503 from appspot server

[bcmills]

#!watchflakes
post <- pkg ~ `^cmd/go` && `(appspot.com|rsc.io).*: 503`

https://build.golang.org/log/730ebecd883624c6969c8bc33d3c34c705ce508a:

go test proxy running at GOPROXY=http://127.0.0.1:37473/mod
--- FAIL: TestScript (0.01s)
    --- FAIL: TestScript/get_insecure_env (2.19s)
        script_test.go:282: 
            # (2022-08-22T19:30:35Z)
            # GOPATH: Set up (0.000s)
            # GOPATH: Try go get -d of HTTP-only repo (should fail). (0.084s)
            # GOPATH: Try again with invalid GOINSECURE (should fail). (0.052s)
            # GOPATH: Try with correct GOINSECURE (should succeed). (2.050s)
            > env GOINSECURE=insecure.go-get-issue-15410.appspot.com/pkg/p
            > go get -d insecure.go-get-issue-15410.appspot.com/pkg/p
            [stderr]
            package insecure.go-get-issue-15410.appspot.com/pkg/p: unrecognized import path "insecure.go-get-issue-15410.appspot.com/pkg/p": reading https://insecure.go-get-issue-15410.appspot.com/pkg?go-get=1: 503 Service Unavailable
            [exit status 1]
            FAIL: testdata/script/get_insecure_env.txt:16: unexpected command failure
            
FAIL
FAIL	cmd/go	731.739s

While I'm shoving stuff into the local test server for #27494, may as well do this test too. 😅

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg ~ `^cmd/go` && `appspot.com.*: 503`

2022-08-22 18:57 linux-386-longtest go@a74e5f58 cmd/go.TestScript (log)

go test proxy running at GOPROXY=http://127.0.0.1:37473/mod
--- FAIL: TestScript (0.01s)
    --- FAIL: TestScript/get_insecure_env (2.19s)
        script_test.go:282: 
            # (2022-08-22T19:30:35Z)
            # GOPATH: Set up (0.000s)
            # GOPATH: Try go get -d of HTTP-only repo (should fail). (0.084s)
            # GOPATH: Try again with invalid GOINSECURE (should fail). (0.052s)
            # GOPATH: Try with correct GOINSECURE (should succeed). (2.050s)
            > env GOINSECURE=insecure.go-get-issue-15410.appspot.com/pkg/p
            > go get -d insecure.go-get-issue-15410.appspot.com/pkg/p
            [stderr]
            package insecure.go-get-issue-15410.appspot.com/pkg/p: unrecognized import path "insecure.go-get-issue-15410.appspot.com/pkg/p": reading https://insecure.go-get-issue-15410.appspot.com/pkg?go-get=1: 503 Service Unavailable
            [exit status 1]
            FAIL: testdata/script/get_insecure_env.txt:16: unexpected command failure

— watchflakes

[rsc]

Added rsc.io to the regexp since it too is running on appspot.com.

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg ~ `^cmd/go` && `(appspot.com|rsc.io).*: 503`

2022-09-29 09:05 linux-amd64-longtest go@ea2a2c0c cmd/go.TestIssue11457 (log)

go test proxy running at GOPROXY=http://127.0.0.1:37887/mod
--- FAIL: TestIssue11457 (2.14s)
    go_test.go:1010: running testgo [get -d -u rsc.io/go-get-issue-11457]
    go_test.go:1010: standard error:
    go_test.go:1010: package rsc.io/go-get-issue-11457: unrecognized import path "rsc.io/go-get-issue-11457": reading https://rsc.io/go-get-issue-11457?go-get=1: 503 Service Unavailable

    go_test.go:1010: go [get -d -u rsc.io/go-get-issue-11457] failed unexpectedly in /workdir/go/src/cmd/go: exit status 1

— watchflakes