Cannot install on go 1.11.2

[andig]

What dep command did you run?

~/gosdm630 $ go get -u github.com/golang/dep/cmd/dep
go: finding github.com/golang/dep/cmd/dep latest
go: finding github.com/golang/dep/cmd latest
# github.com/golang/dep/gps
../go/pkg/mod/github.com/golang/[email protected]/gps/constraint.go:149:4: undefined: semver.Constraint

[Syspretor]

I met the same error, have you found a solution of it ?

[andig]

No :(

[kevinburke]

I think this has something to do with the new Go modules code? You can see semver.Constraint exists in github.com/golang/dep/vendor/github.com/Masterminds/semver/constraints.go so something must be happening for that file to not load correctly.

Can you try turning off Go modules support and seeing if this works?

[kevinburke]

FWIW, I can't reproduce this on either tip or Go 1.11.2.

[andig]

Closing thin one as I've happily moved everything to modules. Thank you for the great support received here!

[pocari]

I met the same error.
but, I succeeded when GO111MODULE=on was changed to GO111MODULE=off.

[rski]

Here's some digging from my encounter with this.
With modules on, go get picks up the latest tag for semver:

go: extracting github.com/Masterminds/vcs v1.13.0
go: finding github.com/golang/protobuf/proto latest
go: extracting github.com/Masterminds/semver v1.4.2

However, the vendored Masterminds is from branch 2.x. In the tagged v1.4.2, Constraint is private, in 2.x it's not. I'm not 100% sure how to fix this in my case, but leaving this here to potentially satisfy someone else's curiosity.

[bobzoller]

I fixed this by forcing semver to a particular (2.x) git commit:

go get github.com/Masterminds/semver@059deebd1619

[tendolukwago]

Here's some digging from my encounter with this.
With modules on, go get picks up the latest tag for semver:

go: extracting github.com/Masterminds/vcs v1.13.0
go: finding github.com/golang/protobuf/proto latest
go: extracting github.com/Masterminds/semver v1.4.2

However, the vendored Masterminds is from branch 2.x. In the tagged v1.4.2, Constraint is private, in 2.x it's not. I'm not 100% sure how to fix this in my case, but leaving this here to potentially satisfy someone else's curiosity.

Thank you for satisfying my curiosity lol