env GO111MODULE=on

# Concurrent builds should succeed, even if they need to download modules.
go build ./x &
go build ./y
wait

# Concurrent builds should update go.sum to the union of the hashes for the
# modules they read.
cmp go.sum go.sum.want

-- go.mod --
module golang.org/issue/26794

require (
	golang.org/x/text v0.3.0
	rsc.io/sampler v1.0.0
)
-- x/x.go --
package x

import _ "golang.org/x/text/language"
-- y/y.go --
package y

import _ "rsc.io/sampler"
-- go.sum.want --
golang.org/x/text v0.3.0 h1:ivTorhoiROmZ1mcs15mO2czVF0uy0tnezXpBVNzgrmA=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
rsc.io/sampler v1.0.0 h1:SRJnjyQ07sAtq6G4RcfJEmz8JxqLyj3PoGXG2VhbDWo=
rsc.io/sampler v1.0.0/go.mod h1:cqxpM3ZVz9VtirqxZPmrWzkQ+UkiNiGtkrN+B+i8kx8=