func TestNegativeRead(t *testing.T) {
	// should panic with a description pointing at the reader, not at itself.
	// (should NOT panic with slice index error, for example.)
	b := NewReader(new(negativeReader))
	defer func() {
		switch err := recover().(type) {
		case nil:
			t.Fatal("read did not panic")
		case error:
			if !strings.Contains(err.Error(), "reader returned negative count from Read") {

				Mode:     0666,
			},
		},
	},
	// Tests that we verify (and accept valid) crc32s on files
	// with crc32s in their file header (not in data descriptors)
	{
		Name: "crc32-not-streamed.zip",
		File: []ZipTestFile{
			{
				Name:     "foo.txt",
				Content:  []byte("foo\n"),
				Modified: time.Date(2012, 3, 8, 16, 59, 10, 0, timeZone(-8*time.Hour)),

	VADDPD 8128(DX), Z28, Z29       // 62619d40586a7f
	VADDPD 8128(DX)(AX*2), Z0, Z29  // 6261fd48586c427f
	VADDPD 8128(DX)(AX*2), Z29, Z1  // 62f19540584c427f
	// EVEX: compressed displacement that does not fit into 8bits.
	VADDPD 2048(DX), X29, X0        // 62f19500588200080000
	VADDPD 2048(DX), X1, X29        // 6261f50858aa00080000
	VADDPD 2048(DX), X29, X28       // 6261950058a200080000

	//	#line xxx "not-str-lit"
	//	void __cgo_f_xxx_5(void) { static const char __cgo_undefined__5[] = (name); }
	//
	// If we see an error at not-declared:xxx, the corresponding name is not declared.
	// If we see an error at not-type:xxx, the corresponding name is not a type.
	// If we see an error at not-int-const:xxx, the corresponding name is not an integer constant.
	// If we see an error at not-num-const:xxx, the corresponding name is not a number constant.

	{"12\u0e50\u0e52hello34\u0e50\u0e51", not(isDigit), 8, 12},

	// tests of invalid UTF-8
	{"\x801", isDigit, 1, 1},
	{"\x80abc", isDigit, -1, -1},
	{"\xc0a\xc0", isValidRune, 1, 1},
	{"\xc0a\xc0", not(isValidRune), 0, 2},
	{"\xc0☺\xc0", not(isValidRune), 0, 4},
	{"\xc0☺\xc0\xc0", not(isValidRune), 0, 5},
	{"ab\xc0a\xc0cd", not(isValidRune), 2, 4},
	{"a\xe0\x80cd", not(isValidRune), 1, 2},
}

// Code generated by avx512test. DO NOT EDIT.

#include "../../../../../../runtime/textflag.h"

TEXT asmtest_avx512_vbmi2(SB), NOSPLIT, $0
	VPCOMPRESSB X7, K1, X15                            // 62d27d0963ff
	VPCOMPRESSB X13, K1, X15                           // 62527d0963ef
	VPCOMPRESSB X8, K1, X15                            // 62527d0963c7
	VPCOMPRESSB X7, K1, X28                            // 62927d0963fc