Tag Archives: Bug record

IndexError: list index out of range [How to Solve]

IndexError: list index out of range

When training ctpn, some pictures report this error
the error code is as follows. Because the mean value is subtracted from three channels respectively when subtracting the mean value, some pictures are of two channels, and the length does not match, so an error is reported
solution: convert to RGB three channel diagram here

    vggMeans = [122.7717, 102.9801, 115.9465] 
    imageList = cv2.split(image.astype(np.float32))
    imageList[0] = imageList[0]-vggMeans[0]  
    imageList[1] = imageList[1]-vggMeans[1]
    imageList[2] = imageList[2]-vggMeans[2]
    image = cv2.merge(imageList) 

[Solved] Cannot read properties of undefined (reading ‘propsData‘)“

When using Vue, I always reported errors when introducing components related to menus in antd, and other components unrelated to menus can be displayed normally. This bug bothered me for a long time, and finally found a solution to the problem on GitHub.

The error information is as follows:

Problem Description:

I first introduced it this way:

import Vue from 'vue'
import { Menu, Layout, Icon, Breadcrumb } from 'ant-design-vue'
Vue.use(Layout)
export default {

  components: {
    'a-menu': Menu,
    'a-icon': Icon,
    'a-breadcrumb': Breadcrumb,
    'a-breadcrumb-item': Breadcrumb.Item
  },

Then the browser kept reporting errors. By checking the error information on the browser console, I probably knew that it was due to the lack of asubmenu and amenuitem. Therefore, I introduced it, but I didn’t respond, so I thought it wasn’t this problem. After asking Du Niang, I couldn’t find a solution. Finally, I found that the way I introduced it was wrong on GitHub.

The correct approach should be to introduce the following in the component:

     components: {
    'a-menu': Menu,
    'a-icon': Icon,
    'a-breadcrumb': Breadcrumb,
    'a-breadcrumb-item': Breadcrumb.Item,
    ASubMenu: Menu.SubMenu,
    AMenuItem: Menu.Item
  },

Finally, the source code of the page is attached for reference:

<template>
  <a-layout id="components-layout-demo-top-side-2">
    <a-layout-header class="header">
      <div class="logo" />
      <a-menu
        theme="dark"
        mode="horizontal"
        :default-selected-keys="['2']"
        :style="{ lineHeight: '64px' }"
      >
        <a-menu-item key="1">
          nav 1
        </a-menu-item>
        <a-menu-item key="2">
          nav 2
        </a-menu-item>
        <a-menu-item key="3">
          nav 3
        </a-menu-item>
      </a-menu>
    </a-layout-header>
    <a-layout>
      <a-layout-sider width="200" style="background: #fff">
        <a-menu
          mode="inline"
          :default-selected-keys="['1']"
          :default-open-keys="['sub1']"
          :style="{ height: '100%', borderRight: 0 }"
        >
          <a-sub-menu key="sub1">
            <span slot="title"><a-icon type="user" />subnav 1</span>
            <a-menu-item key="1">
              option1
            </a-menu-item>
            <a-menu-item key="2">
              option2
            </a-menu-item>
            <a-menu-item key="3">
              option3
            </a-menu-item>
            <a-menu-item key="4">
              option4
            </a-menu-item>
          </a-sub-menu>
          <a-sub-menu key="sub2">
            <span slot="title"><a-icon type="laptop" />subnav 2</span>
            <a-menu-item key="5">
              option5
            </a-menu-item>
            <a-menu-item key="6">
              option6
            </a-menu-item>
            <a-menu-item key="7">
              option7
            </a-menu-item>
            <a-menu-item key="8">
              option8
            </a-menu-item>
          </a-sub-menu>
          <a-sub-menu key="sub3">
            <span slot="title"><a-icon type="notification" />subnav 3</span>
            <a-menu-item key="9">
              option9
            </a-menu-item>
            <a-menu-item key="10">
              option10
            </a-menu-item>
            <a-menu-item key="11">
              option11
            </a-menu-item>
            <a-menu-item key="12">
              option12
            </a-menu-item>
          </a-sub-menu>
        </a-menu>
      </a-layout-sider>
      <a-layout style="padding: 0 24px 24px">
        <a-breadcrumb style="margin: 16px 0">
          <a-breadcrumb-item>Home</a-breadcrumb-item>
          <a-breadcrumb-item>List</a-breadcrumb-item>
          <a-breadcrumb-item>App</a-breadcrumb-item>
        </a-breadcrumb>
        <a-layout-content
          :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
        >
          Content
        </a-layout-content>
      </a-layout>
    </a-layout>
  </a-layout>
</template>
<script>
import Vue from 'vue'
import { Menu, Layout, Icon, Breadcrumb } from 'ant-design-vue'
Vue.use(Layout)
export default {

  components: {
    'a-menu': Menu,
    'a-icon': Icon,
    'a-breadcrumb': Breadcrumb,
    'a-breadcrumb-item': Breadcrumb.Item,
    ASubMenu: Menu.SubMenu,
    AMenuItem: Menu.Item

  },
  data () {
    return {
      collapsed: false
    }
  },
  methods: {
  }
}
</script>
<style>
#components-layout-demo-top-side-2 .logo {
  width: 120px;
  height: 31px;
  background: rgba(255, 255, 255, 0.2);
  margin: 16px 28px 16px 0;
  float: left;
}
</style>

[Solved] java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed

Project scenario:

Spring boot project, user-defined filter, intercept requests and process business.


Problem Description:

When you start the project access interface, you call resp.sendRedirect () in the custom filter.


Cause analysis:

After the response has been submitted, the sendredirect() method cannot be called.

In fact, chain. Dofilter (req, resp) is executed; Cannot use sendredirect() of resp object after

So looking at the code, we find that:

...

  HttpServletRequest httpRequest = (HttpServletRequest) request;
  HttpServletResponse httpResponse = (HttpServletResponse) response;
  ....
  boolean flag = getStatus();
  if (flag) {
      ....
      chain.doFilter(request, response);
  }
  httpResponse.sendRedirect(“xxxx”);
...

if the judged flag is true, chain.dofilter (request, response) will be executed, and httpresponse.sendredirect (“XXXX”) </ font> will be executed after execution


Solution:

After chain. Dofilter (request, response), add return to end the current method.

...

  HttpServletRequest httpRequest = (HttpServletRequest) request;
  HttpServletResponse httpResponse = (HttpServletResponse) response;
  ....
  boolean flag = getStatus();
  if (flag) {
      ....
      chain.doFilter(request, response);
      return;
  }
  httpResponse.sendRedirect(“xxxx”);
...

configure: error: no acceptable C compiler found in $PATH

Error information:

[[email protected] keepalived-2.2.2]# ./configure --prefix=/usr/local/keepalived --sysconf=/etc
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/root/app/server/keepalived-2.2.2':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

Solution:

[[email protected] keepalived-2.2.2]# yum install gcc

Klee Error: Assertion `userMainFn && “unable to get user main“‘ failed

Problem
klee reports an error.

klee: /tmp/klee_src/tools/klee/main.cpp:1068: void createLibCWrapper(std::vector<std::unique_ptrllvm::Module >&, llvm::StringRef, llvm::StringRef): Assertion `userMainFn && “unable to get user main”’ failed.

Cause
The test code added ifdef INCLUDEMAIN, which caused the main function to be skipped and triggered klee’s assertion.

#ifdef INCLUDEMAIN
int main 
.....
.....
#endif

solve

Just comment out those two lines.