// Verify that various kinds of "imported and not used"
// errors are caught by the compiler.
// Does not compile.

package main

// standard
import "fmt"	// ERROR "imported and not used.*fmt|\x22fmt\x22 imported and not used"

// renamed
import X "math"	// ERROR "imported and not used.*math|\x22math\x22 imported as X and not used"

// import dot
import . "bufio"	// ERROR "imported and not used.*bufio|imported and not used"

//
//	sym = valfunc(func, p, 0, arg);
//	record sym.P as value at p->pc;
//	sym = valfunc(func, p, 1, arg);
//
// where func is the function, val is the current value, p is the instruction being
// considered, and arg can be used to further parameterize valfunc.
func funcpctab(ctxt *Link, func_ *LSym, desc string, valfunc func(*Link, *LSym, int32, *Prog, int32, interface{}) int32, arg interface{}) *LSym {
	dbg := desc == ctxt.Debugpcln
	dst := []byte{}

 Filter 1 was used 1 times
 Filter 4 was used 31 times
Testing basn4a16.png: PASS (64 zero samples)
 Filter 0 was used 1 times
 Filter 1 was used 2 times
 Filter 2 was used 1 times
 Filter 4 was used 28 times
Testing basn6a08.png: PASS (160 zero samples)
 Filter 1 was used 1 times
 Filter 4 was used 31 times
Testing basn6a16.png: PASS (1072 zero samples)
 Filter 1 was used 4 times
 Filter 4 was used 28 times

	c1 // ERROR "c1 (untyped int constant 991) is not used"
	c2 // ERROR "c2 (constant 0.5 of type float32) is not used"
	c1 /* ERROR "c1 + c2 (constant 991.5 of type float32) is not used" */ + c2
	c3 // ERROR `c3 (untyped string constant "foo") is not used`

	// variables
	x // ERROR "x (variable of type int) is not used"

	// values
	nil // ERROR "nil is not used"

// Variables declared in function bodies must be 'used'.
type T struct{}
func (r T) _(a, b, c int) (u, v, w int) {
	var x1 /* ERROR "declared and not used" */ int
	var x2 /* ERROR "declared and not used" */ int
	x1 = 1
	(x2) = 2

	y1 /* ERROR "declared and not used" */ := 1
	y2 /* ERROR "declared and not used" */ := 2
	y1 = 1
	(y1) = 2

	{
		var x1 /* ERROR "declared and not used" */ int

        synchronized( lock ) {
            try {
                while( used == 0 ) {
                    lock.wait();
                }
            } catch( InterruptedException ie ) {
                throw new IOException( ie.getMessage() );
            }
            i = pipe_buf.length - beg_idx;
            result = len > used ? used : len;
            if( used > i && result > i ) {

package main

import "bufio"	// ERROR "previous|not used"
import bufio "os"	// ERROR "redeclared|redefinition|incompatible" "imported and not used|imported as bufio and not used"

import (
	"fmt"	// ERROR "previous|not used"
	fmt "math"	// ERROR "redeclared|redefinition|incompatible" "imported and not used: \x22math\x22 as fmt|imported as fmt and not used"
	. "math"	// GC_ERROR "imported and not used: \x22math\x22$|imported and not used"

		},
		{
			// Node1 scores (used resources) on 0-MaxNodeScore scale
			// Node1 Score:
			// rawScoringFunction(used + requested / available)
			// resourceScoringFunction((0+2),8)
			//  = 2/8 * maxUtilization = 25 = rawScoringFunction(25)
			// Node1 Score: 2
			// Node2 scores (used resources) on 0-MaxNodeScore scale
			// rawScoringFunction(used + requested / available)
			// resourceScoringFunction((0+2),4)

	"io"          // ERROR "imported and not used"
	"io/ioutil"   // ERROR "imported and not used"
	"log"         // ERROR "imported and not used"
	"math"        // ERROR "imported and not used"
	"math/big"    // ERROR "imported and not used" "too many errors"
	"math/bits"
	"net"
	"net/http"
	"os"
	"path"
	"path/filepath"
	"regexp"
	"strings"

        }

        public void clear() {
            used = pointer = 0;
        }

        public byte[] readBuffer() {
            if (used == buffer.length && pointer == 0) {
                pointer = used;
                return buffer;
            } else if (pointer < used) {
                byte[] buf = new byte[used - pointer];
                read(buf, 0, used - pointer);
                return buf;