matrix:
        dbversion: [ 'v6.5.0' ]
        go: ['1.22', '1.21', '1.20']
        platform: [ ubuntu-latest ]
    runs-on: ${{ matrix.platform }}

    steps:
      - name: Setup TiDB
        uses: Icemap/tidb-action@main
        with:
          port: 9940
          version: ${{matrix.dbversion}}

      - name: Set up Go 1.x
        uses: actions/setup-go@v4
        with:

		// the size of the type, up to the size of the size class. This space
		// is safe for the GC to scan since it's zero, and GCBits checks to
		// make sure that's true. But we need to handle the fact that the bitmap
		// may be larger than we expect.
		return
	}
	t.Errorf("bad GC program for %v:\nwant %+v\ngot  %+v", name, mask0, mask)
}

func trimDead(mask []byte) []byte {

}


suspend fun <T : MutableCollection<Any?>> ReadContext.readCollectionInto(factory: (Int) -> T): T =
    readCollectionInto(factory) { read() }


suspend fun WriteContext.writeMap(value: Map<*, *>) {
    writeSmallInt(value.size)
    writeMapEntries(value)
}


suspend fun WriteContext.writeMapEntries(value: Map<*, *>) {
    for (entry in value.entries) {
        write(entry.key)

                    if (robotsTxt != null) {
                        final String[] sitemaps = robotsTxt.getSitemaps();
                        if (sitemaps.length > 0) {
                            crawlerContext.addSitemaps(sitemaps);
                        }

                        final RobotsTxt.Directive directive = robotsTxt.getMatchedDirective(userAgent);

	}
	origPtr := uint(br.ReadBits(24))

	// If not every byte value is used in the block (i.e., it's text) then
	// the symbol set is reduced. The symbols used are stored as a
	// two-level, 16x16 bitmap.
	symbolRangeUsedBitmap := br.ReadBits(16)
	symbolPresent := make([]bool, 256)
	numSymbols := 0
	for symRange := uint(0); symRange < 16; symRange++ {
		if symbolRangeUsedBitmap&(1<<(15-symRange)) != 0 {

// scavenged bit is set the alloc bit is necessarily unset, so some
// of the bits described by scav may be cleared in the final bitmap if
// ranges in chunks overlap with them.
//
// scav is optional, and if nil, the scavenged bitmap will be cleared
// (as opposed to all 1s, which it usually is). Furthermore, every
// chunk index in scav must appear in chunks; ones that do not are
// ignored.

//	VCHAR          =  %x21-7E
func validHeaderValueByte(c byte) bool {
	// mask is a 128-bit bitmap with 1s for allowed bytes,
	// so that the byte c can be tested with a shift and an and.
	// If c >= 128, then 1<<c and 1<<(c-64) will both be zero.
	// Since this is the obs-text range, we invert the mask to
	// create a bitmap with 1s for disallowed bytes.
	const mask = 0 |
		(1<<(0x7f-0x21)-1)<<0x21 | // VCHAR: %x21-7E

	if !minSizeForMallocHeaderIsSizeClass {
		throw("min size of malloc header is not a size class boundary")
	}
	// Check that the pointer bitmap for all small sizes without a malloc header
	// fits in a word.
	if minSizeForMallocHeader/goarch.PtrSize > 8*goarch.PtrSize {
		throw("max pointer/scan bitmap size for headerless objects is too large")
	}

	if minTagBits > taggedPointerBits {
		throw("taggedPointerbits too small")
	}

	aoff = objw.Uint32(&argsSymTmp, aoff, uint32(args.N))          // number of bits in each bitmap

	locals := bitvec.New(int32(maxLocals / int64(types.PtrSize)))
	loff := objw.Uint32(&liveSymTmp, 0, uint32(len(lv.stackMaps))) // number of bitmaps
	loff = objw.Uint32(&liveSymTmp, loff, uint32(locals.N))        // number of bits in each bitmap

	for _, live := range lv.stackMaps {
		args.Clear()
		locals.Clear()

			n += nr
			continue
		}
		break
	}
	return s[:n], n > 0
}

// isIdentASCII reports whether c is an ASCII identifier byte.
func isIdentASCII(c byte) bool {
	// mask is a 128-bit bitmap with 1s for allowed bytes,
	// so that the byte c can be tested with a shift and an and.
	// If c > 128, then 1<<c and 1<<(c-64) will both be zero,
	// and this function will return false.
	const mask = 0 |