安全地中断csv读写

我正在处理csv文件，当我中断该过程时，我想将未处理的数据存储到另一个文件中

这就是我所做的

csvFile, err := os.Open(csvPath)
r := csv.NewReader(csvFile)

sigc := make(chan os.Signal, 1)
signal.Notify(sigc,
    syscall.SIGHUP,
    syscall.SIGINT,
    syscall.SIGTERM,
    syscall.SIGQUIT)
go func() {
    <-sigc

    savePending(r)
}()

for {
    record, err := r.Read()
    if err == io.EOF {
        break
    }

    if err != nil {
        log.Println(record, err)
        continue
    }

    
    doSomethingWithRecord(record)
}

但是当我运行代码时，然后按CTRL+C来中断脚本，我总是感到恐慌

panic: runtime error: slice bounds out of range [:7887] with capacity 4096

goroutine 82 [running]:
bufio.(*Reader).ReadSlice(0xc0000c2ea0, 0x105930a, 0x88, 0x90, 0xc00090cab0, 0x0, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/bufio/bufio.go:334 +0x232
encoding/csv.(*Reader).readLine(0xc00015c1b0, 0x9, 0x9, 0xc00090cab0, 0xc00090f680, 0x20e)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:218 +0x49
encoding/csv.(*Reader).readRecord(0xc00015c1b0, 0x0, 0x0, 0x0, 0xc00090cab0, 0x9, 0x9, 0x0, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:266 +0x115
encoding/csv.(*Reader).ReadAll(0xc00015c1b0, 0xc0005af2c0, 0x1000, 0xc0006fc000, 0xc0001da608, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:202 +0x74
main.savePending(0xc00015c1b0, 0x0, 0x0, 0x0)

---

可能是什么问题？

当启动

savePending

功能时，主例程继续从读卡器读取数据

---

在您同时使用的

csv.Reader

类型上中止for循环如何（从主线程和goroutine）。它的方法是线程安全的吗？啊，正确，认为它不是线程安全的

panic: runtime error: slice bounds out of range [:7887] with capacity 4096

goroutine 82 [running]:
bufio.(*Reader).ReadSlice(0xc0000c2ea0, 0x105930a, 0x88, 0x90, 0xc00090cab0, 0x0, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/bufio/bufio.go:334 +0x232
encoding/csv.(*Reader).readLine(0xc00015c1b0, 0x9, 0x9, 0xc00090cab0, 0xc00090f680, 0x20e)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:218 +0x49
encoding/csv.(*Reader).readRecord(0xc00015c1b0, 0x0, 0x0, 0x0, 0xc00090cab0, 0x9, 0x9, 0x0, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:266 +0x115
encoding/csv.(*Reader).ReadAll(0xc00015c1b0, 0xc0005af2c0, 0x1000, 0xc0006fc000, 0xc0001da608, 0x0)
        /usr/local/Cellar/go/1.13.3/libexec/src/encoding/csv/reader.go:202 +0x74
main.savePending(0xc00015c1b0, 0x0, 0x0, 0x0)