# https://golang.org/issue/41297: 'go list -m' should not require go.sum with
# -versions or when all args are version queries.

go mod init m
go mod edit -require=rsc.io/quote@v1.5.1

go list -m -mod=readonly rsc.io/quote@latest
stdout '^rsc\.io/quote v1\.5\.2$'
! stderr .

go list -m -mod=readonly -versions rsc.io/quote
stdout 'rsc\.io/quote v1\.0\.0 .* v1\.5\.3-pre1$'
! stderr .

# Incidentally fetching the required version of a module records its checksum,
# just because it happens to be in the build list, and recording the checksum
# triggers an error under -mod=readonly.
#
# TODO(#41297): This should not be an error.
! go list -m -mod=readonly rsc.io/quote@<v1.5.2
stderr '^go: updates to go.sum needed, disabled by -mod=readonly$'
! stderr 'missing go.sum entry'

# Attempting to list the versions of a module that is not a root dependency
# causes the build list to be resolved (so that the selected version can *also*
# be identified, even though it is not relevant to this particular output).
# That, in turn, causes us to need checksums for the go.sum files for the
# modules in the module graph.
#
# TODO(#41297): This should not be an error either.
! go list -m -mod=readonly -versions rsc.io/sampler
stderr '^go list -m: rsc\.io/quote@v1\.5\.1: missing go\.sum entry; to add it:\n\tgo mod download rsc\.io/quote$'