[short] skip

# Programs in Go 1.21 work module should trigger run-time error.
cp go.mod.21 go.mod
! go run .
stderr 'panic: panic called with nil argument'

! go run rsc.io/panicnil
stderr 'panic: panic called with nil argument'

# Programs in Go 1.20 work module use old panic nil behavior.
cp go.mod.20 go.mod
! go run .
stderr 'panic: nil'

! go run rsc.io/panicnil
stderr 'panic: nil'

stderr '^\texample.com/version@v1.2.0: is replaced in go.mod, but not marked as replaced in vendor/modules.txt'
stderr '^\tTo ignore the vendor directory, use -mod=readonly or -mod=mod.\n\tTo sync the vendor directory, run:\n\t\tgo mod vendor$'

# Module-specific subcommands should continue to load the full module graph.
go mod graph
stdout '^example.com/printversion@v1.0.0 example.com/version@v1.0.0$'

! stderr 'compile.*-pgoprofile'

# check that pgo doesn't appear in build info
! stderr 'build\\t-pgo='

# other build-related commands
go install -a -n -pgo=auto ./a/a1
stderr 'compile.*-pgoprofile=.*a1.go'

go run -a -n -pgo=auto ./a/a1
stderr 'compile.*-pgoprofile=.*a1.go'

go test -a -n -pgo=auto ./a/a1
stderr 'compile.*-pgoprofile=.*a1.go.*a1_test.go'
stderr 'compile.*-pgoprofile=.*external_test.go'

```
go run golang.org/x/website/cmd/golangorg@latest -goroot=..
```

Then open http://localhost:6060/doc/next. Refresh the page to see your latest edits.

## For the release team

The `relnote` tool, at `golang.org/x/build/cmd/relnote`, operates on the files
in `doc/next`.

As a release cycle nears completion, run `relnote todo` to get a list of

# This test checks the behavior of 'go run' with a 'cmd@version' argument.
# Most of 'go run' is covered in other tests.
# mod_install_pkg_version covers most of the package loading functionality.
# This test focuses on 'go run' behavior specific to this mode.
[short] skip

# 'go run pkg@version' works outside a module.
env GO111MODULE=auto
go run example.com/cmd/a@v1.0.0
stdout '^a@v1.0.0$'

[exec:patch] ! stdout .
[exec:patch] stderr '^go: example\.com/m imports\n\texample\.net/added: module example\.net/added@latest found \(v0\.3\.0, replaced by \./a1\), but does not contain package example\.net/added$'

# When we run 'go mod tidy -e', we should proceed past the first error and follow
# it with a second error describing the version discrepancy.
#
# We should not provide advice on how to push past the version discrepancy,

# sync/atomic itself (see #57445). Just a short test run is needed
# since we're mainly interested in making sure the test builds and can
# execute at least one test.

go test -short -covermode=atomic -run=TestStoreInt64 sync/atomic
go test -short -covermode=atomic -run=TestAnd8 internal/runtime/atomic

# Skip remainder if no race detector support.
[!race] skip

go test -short -cover -race -run=TestStoreInt64 sync/atomic

cp go.work go.work.backup
cp go.work.dup go.work
! go run example.com/b
stderr 'go.work:6: path .* appears multiple times in workspace'
cp go.work.backup go.work

cp go.work.d go.work
go work use # update go version
go run example.com/d

# Test that we don't run into "newRequirements called with unsorted roots"
# panic with unsorted main modules.
cp go.work.backwards go.work
go work use # update go version

# If we run 'go mod tidy -e', we should still save enough checksums to run
# 'go list -m all' reproducibly with go 1.16, even though we can't list
# the specific package.

go mod tidy -e
! stderr '\n\tgo mod tidy'
cmp go.mod go.mod.orig

# Building trivial non-main package should run preprofile the first time.
go build -x -pgo=default.pgo lib.go
stderr 'preprofile.*default\.pgo'

# ... but not again ...
go build -x -pgo=default.pgo lib.go
! stderr 'preprofile.*default\.pgo'

# ... unless we use -a.
go build -a -x -pgo=default.pgo lib.go
stderr 'preprofile.*default\.pgo'

# ... building a different package should not run preprofile again, instead