// This is intended to replicate the logic in gofrontend.
func openExportFile(fpath string) (reader io.ReadSeeker, closer io.Closer, err error) {
	f, err := os.Open(fpath)
	if err != nil {
		return
	}
	closer = f
	defer func() {
		if err != nil && closer != nil {
			f.Close()
		}
	}()

	var magic [4]byte
	_, err = f.ReadAt(magic[:], 0)
	if err != nil {
		return
	}

	}
	return pr.processedReader.Read(p)
}

func (pr *progressReader) Close() error {
	pr.closedMu.Lock()
	defer pr.closedMu.Unlock()
	if pr.closed {
		return nil
	}
	pr.closed = true
	if pr.closer != nil {
		pr.closer.Close()
	}
	return pr.rc.Close()
}

func (pr *progressReader) Stats() (bytesScanned, bytesProcessed int64) {
	if pr == nil {
		return 0, 0
	}

    ClosingFuture<Closeable> closingFuture =
        ClosingFuture.submit(
            new ClosingCallable<Closeable>() {
              @Override
              public Closeable call(DeferredCloser closer) throws Exception {
                return closer.eventuallyClose(mockCloseable, executor);
              }
            },
            executor);
    closingFuture.finishToValueAndCloser(

// cLower, cUpper, cTitle or cUncased.
func (c *context) caseType() info {
	cm := c.info & 0x7
	if cm < 4 {
		return cm
	}
	if cm >= cXORCase {
		// xor the last bit of the rune with the case type bits.
		b := c.src[c.pSrc+c.sz-1]
		return info(b&1) ^ cm&0x3
	}
	if cm == cIgnorableCased {
		return cLower
	}
	return cUncased
}

    ClosingFuture<Closeable> closingFuture =
        ClosingFuture.submit(
            new ClosingCallable<Closeable>() {
              @Override
              public Closeable call(DeferredCloser closer) throws Exception {
                return closer.eventuallyClose(mockCloseable, executor);
              }
            },
            executor);
    FluentFuture<Closeable> unused = closingFuture.finishToFuture();
    assertThrows(

	if err != nil {
		return nil, err
	}
	ff, err := NewFatFile(f)
	if err != nil {
		f.Close()
		return nil, err
	}
	ff.closer = f
	return ff, nil
}

func (ff *FatFile) Close() error {
	var err error
	if ff.closer != nil {
		err = ff.closer.Close()
		ff.closer = nil
	}
	return err

	sdc1	$f31, 144($29)
#endif

	// prepare SB register = pc & 0xffffffff00000000
	bal	1f
1:
	dsrl	$28, $31, 32
	dsll	$28, $28, 32

	move	$20, $4 // save R4
	move	$1, $6
	jalr	$5	// call setg_gcc (clobbers R4)
	jalr	$20	// call fn

	ld	$16, 8($29)
	ld	$17, 16($29)
	ld	$18, 24($29)
	ld	$19, 32($29)
	ld	$20, 40($29)
	ld	$21, 48($29)
	ld	$22, 56($29)
	ld	$23, 64($29)
	ld	$28, 72($29)
	ld	$30, 80($29)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package bio

import (
	"io"
	"log"
)

// MustClose closes Closer c and calls log.Fatal if it returns a non-nil error.
func MustClose(c io.Closer) {
	if err := c.Close(); err != nil {
		log.Fatal(err)
	}
}

// MustWriter returns a Writer that wraps the provided Writer,

func (b *streamingBitrotReader) Close() error {
	if b.rc == nil {
		return nil
	}
	if closer, ok := b.rc.(io.Closer); ok {
		// drain the body for connection reuse at network layer.
		xhttp.DrainBody(struct {
			io.Reader
			io.Closer
		}{
			Reader: b.rc,
			Closer: closeWrapper(func() error { return nil }),
		})
		return closer.Close()
	}
	return nil
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

var fail bool

type Closer interface {
	Close()
}

func nilInterfaceDeferCall() {
	var x Closer
	defer x.Close()
	// if it panics when evaluating x.Close, it should not reach here
	fail = true
}

func shouldPanic(f func()) {
	defer func() {
		if recover() == nil {