}
            }
        """
        file("buildSrc/src/main/resources/META-INF/gradle-plugins/test.broken.properties") << """
            implementation-class=PluginImpl
        """
        buildFile << """
            plugins {
                id("test.broken")
            }
        """

        expect:
        2.times {
            fails("broken")

                    broken b.flatMap { it.output }
                    broken b.flatMap { throw new RuntimeException("broken artifact") }
                }
            }

            project(':a') {
                dependencies {
                    implementation project(':b')
                }
            }
        """

        when:
        run(":a:resolve")

        then:
        noExceptionThrown()
    }

        buildFile << """
            task broken {
                doLast {
                    throw new RuntimeException("broken")
                }
            }
        """

        expect:
        executer.withArguments("-Dorg.gradle.logging.level=${level}")
        fails("broken")

        and:
        // Ensure the failure is a location that the fixtures can see

        def location = URI.create("scheme:name")
        def failure = new RuntimeException()

        expect:
        def e = ResourceExceptions.failure(location, "broken", failure)
        e instanceof ResourceException
        e.location == location
        e.message == "broken"
        e.cause == failure
    }

    def "wraps failure with different location"() {
        def location = URI.create("scheme:name")

cd broken
! go build
stderr 'cannot find package'

-- go.mod --
module m

-- x.go --
package x

-- x_test.go --
package x
import "testing"
import _ "net/http"
func Test(t *testing.T) {}

-- broken/go.mod --
module broken
-- broken/http.go --
package broken

import (
	_ "net/http"
	_ "golang.org/x/net/http/httpproxy"

        e.message == 'No result has been specified.'
    }

    def "cannot get id when resolve failed"() {
        org.gradle.internal.Factory<String> broken = { "too bad" }
        def failure = new ModuleVersionResolveException(newSelector(DefaultModuleIdentifier.newId("a", "b"), "c"), broken)

        when:
        result.failed(failure)
        result.moduleVersionId

        then:
        ModuleVersionResolveException e = thrown()

-- go.mod --
module m

-- x.go --
package x

-- x_test.go --
package x
import "testing"
import _ "net/http"
func Test(t *testing.T) {}

-- broken/go.mod --
module broken
-- broken/http.go --
package broken

import (
	_ "net/http"
	_ "golang.org/x/net/http2/hpack"
)

-- importcmd/go.mod --
module importcmd
-- importcmd/x.go --
package importcmd

        """
        file("child/build.gradle") << """
            class Broken extends DefaultTask {
                Broken() {
                    throw new RuntimeException("broken task")
                }
            }
            tasks.register("broken", Broken)
        """

        expect:
        fails("broken")
        failure.assertHasDescription("A problem occurred configuring project ':child'.")

 */
class TokenLookup {
    private Set<Expression> broken;
    private Multimap<Expression, Expression> tokensFor;

    boolean isUnresolved(Expression expression) {
        return broken != null && broken.contains(expression);
    }

    void unresolved(Expression expression) {
        if (broken == null) {
            broken = new HashSet<Expression>();
        }
        broken.add(expression);
    }

		wantOldText     = "[T] and [U] are types, and [T.M] is a method, but [V] is a broken link.\n[rand.Int] and [crand.Reader] are things. [G.M1] and [G.M2] are generic methods.\n"
		wantSynopsis    = "T and U are types, and T.M is a method, but [V] is a broken link."