# Don't allow the creation of modules with special "go" or "toolchain" paths.
! go mod init go
! stderr 'panic'
stderr 'invalid module path'

! go mod init toolchain
! stderr 'panic'
stderr 'invalid module path'

# A module that contains the path element "go" is okay.
go mod init example.com/go
stderr 'creating new go.mod'

# go mod edit won't allow a reserved module path either
! go mod edit -module=go
stderr 'invalid -module'

# The go command should check for work modules for bad
# names to return a proper error and avoid a panic.
cp badmod.txt go.mod
! go list
! stderr panic
stderr 'invalid module path'

-- badmod.txt --
module go