x < x                  // ERROR "x < x .* not used"
	x >= x                 // ERROR "x >= x .* not used"
	x > x                  // ERROR "x > x .* not used"
	*tp                    // ERROR "\*tp .* not used"
	slice[0]               // ERROR "slice\[0\] .* not used"
	m[1]                   // ERROR "m\[1\] .* not used"
	len(slice)             // ERROR "len\(slice\) .* not used"

	append(a, 0)			// ERROR "not used"
	cap(a)				// ERROR "not used"
	complex(1, 2)			// ERROR "not used"
	imag(1i)			// ERROR "not used"
	len(a)				// ERROR "not used"
	make([]int, 10)			// ERROR "not used"
	new(int)			// ERROR "not used"
	real(1i)			// ERROR "not used"
	unsafe.Alignof(a)		// ERROR "not used"
	unsafe.Offsetof(s.f)		// ERROR "not used"
	unsafe.Sizeof(a)		// ERROR "not used"

	close(c)
	copy(a, a)

	int(0) // ERROR "int\(0\) evaluated but not used|is not used"
	string([]byte("abc")) // ERROR "string\(.*\) evaluated but not used|is not used"

	append(x, 1) // ERROR "not used"
	cap(x) // ERROR "not used"
	complex(1, 2) // ERROR "not used"
	complex(f, 1) // ERROR "not used"
	imag(1i) // ERROR "not used"
	imag(c) // ERROR "not used"
	len(x) // ERROR "not used"
	make([]int, 1) // ERROR "not used"
	make(chan bool) // ERROR "not used"

import (
	"./a" // ERROR "imported and not used: \x22test/a\x22 as surprise|imported and not used: surprise|\x22test/a\x22 imported as surprise and not used"
	"./b" // ERROR "imported and not used: \x22test/b\x22 as surprise2|imported and not used: surprise2|\x22test/b\x22 imported as surprise2 and not used"
	b "./b" // ERROR "imported and not used: \x22test/b\x22$|imported and not used: surprise2|\x22test/b\x22 imported and not used"

// 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"

 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

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"

        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 ) {