goroutine 9 [IO wait]: internal/poll.runtime_pollWait(0x3348a488, 0x72) D:/Program Files (x86)/Go/src/runtime/netpoll.go:305 +0x52 internal/poll.(*pollDesc).wait(0x1337e3b4, 0x72, 0x0) D:/Program Files (x86)/Go/src/internal/poll/fd_poll_runtime.go:84 +0x37 internal/poll.execIO(0x1337e2d4, 0xcf65e0) D:/Program Files (x86)/Go/src/internal/poll/fd_windows.go:175 +0xfc internal/poll.(*FD).Read(0x1337e2c0, {0x13cda000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/internal/poll/fd_windows.go:441 +0x13b net.(*netFD).Read(0x1337e2c0, {0x13cda000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/net/fd_posix.go:55 +0x3f net.(*conn).Read(0x13240078, {0x13cda000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/net/net.go:183 +0x4f bufio.(*Reader).fill(0x13091020) D:/Program Files (x86)/Go/src/bufio/bufio.go:106 +0xe9 bufio.(*Reader).Peek(0x13091020, 0x2) D:/Program Files (x86)/Go/src/bufio/bufio.go:144 +0x6d github.com/gorilla/websocket.(*Conn).read(0x13d2a000, 0x2) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:371 +0x30 github.com/gorilla/websocket.(*Conn).advanceFrame(0x13d2a000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:809 +0xae github.com/gorilla/websocket.(*Conn).NextReader(0x13d2a000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:1009 +0xb5 github.com/gorilla/websocket.(*Conn).ReadMessage(0x13d2a000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:1093 +0x25 go-study/models.recvProc(0x13264140)

这是一个Golang程序的堆栈跟踪（stack trace），它给出了一个goroutine的执行路径。这个goroutine正在等待IO操作完成，该操作可能是读取网络套接字或文件描述符。具体来说，这个goroutine在等待从网络连接中读取数据，因此它被阻塞在runtime_pollWait函数上。在goroutine的执行路径中，我们可以看到它调用了bufio.Reader的fill方法，这是用于填充缓冲区的方法。另外，我们还可以看到这个goroutine使用了github.com/gorilla/websocket包，这是一个用于在Go中实现WebSocket协议的流行库。

相关问题

goroutine 52 [select]: github.com/go-sql-driver/mysql.(*mysqlConn).startWatcher.func1() D:/Program Files (x86)/Go/bin/pkg/mod/github.com/go-sql-driver/mysql@v1.7.1/connection.go:614 +0xaf created by github.com/go-sql-driver/mysql.(*mysqlConn).startWatcher D:/Program Files (x86)/Go/bin/pkg/mod/github.com/go-sql-driver/mysql@v1.7.1/connection.go:611 +0x10a goroutine 83 [select]: github.com/go-redis/redis/v8/internal/pool.(*ConnPool).reaper(0x12f262a0, 0xdf8475800) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/go-redis/redis/v8@v8.11.5/internal/pool/pool.go:485 +0xd6 created by github.com/go-redis/redis/v8/internal/pool.NewConnPool D:/Program Files (x86)/Go/bin/pkg/mod/github.com/go-redis/redis/v8@v8.11.5/internal/pool/pool.go:111 +0x242 goroutine 85 [chan receive]: go-study/models.sendProc(0x12e40cf0) D:/go/go-study/models/Message.go:88 +0x48 created by go-study/models.Chat D:/go/go-study/models/Message.go:79 +0x30d goroutine 86 [IO wait]: internal/poll.runtime_pollWait(0x33340b00, 0x72) D:/Program Files (x86)/Go/src/runtime/netpoll.go:305 +0x52 internal/poll.(*pollDesc).wait(0x138f60f4, 0x72, 0x0) D:/Program Files (x86)/Go/src/internal/poll/fd_poll_runtime.go:84 +0x37 internal/poll.execIO(0x138f6014, 0xa365e0) D:/Program Files (x86)/Go/src/internal/poll/fd_windows.go:175 +0xfc internal/poll.(*FD).Read(0x138f6000, {0x12f41000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/internal/poll/fd_windows.go:441 +0x13b net.(*netFD).Read(0x138f6000, {0x12f41000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/net/fd_posix.go:55 +0x3f net.(*conn).Read(0x12c0aa68, {0x12f41000, 0x1000, 0x1000}) D:/Program Files (x86)/Go/src/net/net.go:183 +0x4f bufio.(*Reader).fill(0x12d1eae0) D:/Program Files (x86)/Go/src/bufio/bufio.go:106 +0xe9 bufio.(*Reader).Peek(0x12d1eae0, 0x2) D:/Program Files (x86)/Go/src/bufio/bufio.go:144 +0x6d github.com/gorilla/websocket.(*Conn).read(0x12f68000, 0x2) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:371 +0x30 github.com/gorilla/websocket.(*Conn).advanceFrame(0x12f68000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:809 +0xae github.com/gorilla/websocket.(*Conn).NextReader(0x12f68000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:1009 +0xb5 github.com/gorilla/websocket.(*Conn).ReadMessage(0x12f68000) D:/Program Files (x86)/Go/bin/pkg/mod/github.com/gorilla/websocket@v1.5.0/conn.go:1093 +0x25 go-study/models.recvProc(0x12e40cf0) D:/go/go-study/models/Message.go:100 +0x105 created by go-study/models.Chat D:/go/go-study/models/Message.go:81 +0x352

这是一个 Go 语言的错误堆栈信息，包含多个 goroutine 的状态信息。每个 goroutine 都是 Go 语言运行时管理的并发执行单元。堆栈信息中展示了每个 goroutine 的调用栈信息，也就是该 goroutine 执行的函数调用链。其中包含了很多 Go 语言标准库和第三方库的函数调用信息，以及这些函数的执行状态。要定位问题，需要结合具体的业务逻辑和代码来分析这些信息。

class BiTreeNode: def __init__(self, data=None): self.data = data self.l_child = None self.r_child = None class BiTree(object): def __init__(self, root=None): self.root = root def createBiTree(order, self=None): q = LinkQueue() self.l_child = None self.r_child = None root = BiTreeNode bt = BiTree(root) q.offer(root) for i in range(1, len(order)): c = order[i] node = q.peek() if node.l_child is None: newNode = BiTreeNode(c) node.l_child = newNode q.offer(newNode) elif node.r_child is None: newNode = BiTreeNode(c) node.r_child = newNode q.offer(newNode) q.poll() return bt def preOrder(root): if root is not None: print(root.data, end='') BiTree.preOrder(root.l_child) BiTree.preOrder(root.r_child) def inOrder(root): if root is not None: BiTree.inOrder(root.l_child) print(root.data, end='') BiTree.inOrder(root.r_child) def postOrder(root): if root is not None: BiTree.postOrder(root.l_child) BiTree.postOrder(root.r_child) print(root.data, end='') bt = BiTree.createBiTree('') print("先序遍历：") BiTree.preOrder(bt.root) print() print("中序遍历：") BiTree.inOrder(bt.root) print() print("后序遍历：") BiTree.postOrder(bt.root) print()这段代码有什么问题

这段代码存在以下几个问题：

1. `root = BiTreeNode`应该改为`root = BiTreeNode()`，即需要调用`BiTreeNode`类的构造函数来创建一个具体的节点对象。否则，变量`root`仅仅是一个指向`BiTreeNode`类的引用，而不是一个具体的节点对象。
2. `createBiTree(order, self=None)`方法的定义中，`self`参数是没有用的，应该删除。
3. `preOrder(root)`, `inOrder(root)`和`postOrder(root)`这三个函数的调用方式不正确，应该使用`bt.preOrder(bt.root)`等方式来调用。

下面是更新后的代码：

class BiTreeNode:
    def __init__(self, data=None):
        self.data = data
        self.l_child = None
        self.r_child = None

class BiTree(object):
    def __init__(self, root=None):
        self.root = root

    @classmethod
    def createBiTree(cls, order):
        q = LinkQueue()
        root = BiTreeNode()
        bt = BiTree(root)
        q.offer(root)
        for i in range(len(order)):
            c = order[i]
            node = q.peek()
            if node.l_child is None:
                newNode = BiTreeNode(c)
                node.l_child = newNode
                q.offer(newNode)
            elif node.r_child is None:
                newNode = BiTreeNode(c)
                node.r_child = newNode
                q.offer(newNode)
                q.poll()
        return bt

    def preOrder(self, root):
        if root is not None:
            print(root.data, end='')
            self.preOrder(root.l_child)
            self.preOrder(root.r_child)

    def inOrder(self, root):
        if root is not None:
            self.inOrder(root.l_child)
            print(root.data, end='')
            self.inOrder(root.r_child)

    def postOrder(self, root):
        if root is not None:
            self.postOrder(root.l_child)
            self.postOrder(root.r_child)
            print(root.data, end='')

bt = BiTree.createBiTree('')
print("先序遍历：")
bt.preOrder(bt.root)
print()
print("中序遍历：")
bt.inOrder(bt.root)
print()
print("后序遍历：")
bt.postOrder(bt.root)
print()

注意，上述代码假定`LinkQueue`类已经被定义并导入到当前模块。此外，由于没有输入实际的二叉树节点值，因此代码运行结果并不有意义。