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"

    @Override
    protected void setUp() throws Exception {
        file1 = File.createTempFile("kuromoji_", ".txt");
        FileUtil.write(
                file1.getAbsolutePath(),
                "token1,seg1,reading1,pos1\ntoken2,seg2,reading2,pos2\ntoken3,seg3,reading3,pos3"
                        .getBytes(Constants.UTF_8));
    }

    @Override
    protected void tearDown() throws Exception {
        file1.delete();
    }
    */

        builder.baseName = 'broken worker'
        builder.javaCommand.jvmArgs("-broken")
        def worker = builder.build()
        worker.run(12.toLong())

        then:
        def e = thrown(WorkerProcessException)
        e.message == 'Failed to run broken worker'
        e.cause instanceof ExecException
        e.cause.message.matches("Process 'broken worker 1' finished with non-zero exit value \\d+")

        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()

  - format 1
  - format 2

<broken>''')

        1 * target.describe(!null) >> { DiagnosticsVisitor visitor -> visitor.candidate("format 1"); visitor.candidate("format 2") }
        0 * target._  //no parsing
    }

    def "reports unable to parse non-null"() {
        given:
        target.parseNotation("bad") >> { throw new UnsupportedNotationException("broken-part") }

	if a != b {
		panic("broken equality: a != b")
	}

	m[a] = 1
	m[b] = 2
	if len(m) == 2 {
		panic("broken hash: len(m) == 2")
	}
	if m[a] != 2 {
		panic("m[a] != 2")
	}
}

func test3() {
	var a, b USmall
	copy((*[12]byte)(unsafe.Pointer(&a))[:], "hello world!")
	a.A, a.B = 1, 2
	b.A, b.B = 1, 2
	if a != b {
		panic("broken equality: a != b")
	}
}

func test4() {

-- 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."