# Tests issue #12156, a former index out of range panic.

env GO111MODULE=off
env GOPATH=$WORK/gopath/src/testvendor2 # vendor/x is directly in $GOPATH, not in $GOPATH/src
cd $WORK/gopath/src/testvendor2/src/p

! go build p.go
! stderr panic # Make sure it doesn't panic
stderr 'cannot find package "x"'

-- testvendor2/src/p/p.go --
package p

import "x"
-- testvendor2/vendor/x/x.go --
package x
