Uncaught TypeError: Cannot read property 'length' of null

[SimoModaJob]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.26.1 x64
Electron: 1.7.11
OS: Ubuntu 17.10
Thrown From: php-debug package 0.3.0

Stack Trace

Uncaught TypeError: Cannot read property 'length' of null

At /home/simo/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:135

TypeError: Cannot read property 'length' of null
    at DbgpInstance.parse (/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:135:29)
    at DbgpInstance.handleData (/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:258:10)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:191:7)
    at readableAddChunk (_stream_readable.js:178:18)
    at Socket.Readable.push (_stream_readable.js:136:10)
    at TCP.onread (net.js:560:20)

Commands

Non-Core Packages

atom-debug-ui 1.0.1 
atom-ide-ui 0.11.1 
ide-php 0.7.14 
php-debug 0.3.0 

[cchamplin]

Can you enable protocol debugging in the settings for PHP-Debug, and then paste me the contents of the console for the Atom Developer Console after this error occurs?

[y-morozov]

I have the same error.
Here's my output

-1525441763246.log

[cchamplin]

Thank @y-morozov anyway you can provide me the same file with "Xdebug DBGP Protocol Debugging" checked?

[y-morozov]

@cchamplin It was checked. Am I missing something?

[cchamplin]

You may need to change the log level in the atom developer tools to "Verbose"

[y-morozov]

Ok, here you are.
-1525442937001.log

[y-morozov]

Expanded arrays:
-1525443111211.log

[cchamplin]

Okay I'm still having trouble reproducing this, or seeing the error.

If you're willing can you find the php-debug plugin on your machine and perform the following:

1. Open php-debug/lib/engines/dbgp/dbgp-instance.js
2. Replace the handleData function starting on line ~253

  handleData (data) {
    if (this._buffers == undefined || this._buffers == null) {
      return;
    }
    if (data == null) {
      console.log("null data");
    } else {
      console.log(data.toString("hex"))
      console.log("buffer status - bufferIdx: " + this._bufferIdx + " bufferReadIdx: " + this._bufferReadIdx);
    }
    this._buffers[this._bufferIdx++ % this._bufferSize] = data
    this.parse()
  }

3. Send me the log after restarting atom

[y-morozov]

@cchamplin okay, here it is
-1525447807355.log

My steps to reproduce:

1. Set breakpoint
2. Start debugging session
3. Click "Step over" (or any other button)

My setup:

Website code runs inside VirtualBox (PHP 7.1.15-0ubuntu0.17.10.1), with remote connect to Atom debugger (MacOs, PHP 7.1.14)

[cchamplin]

Thanks a bunch!

Can you change 159 and 160 in that file from:

buffer = null;
writeIdx = buffer.length-idx;

to

writeIdx = buffer.length-idx;
buffer = null;

and let me know if the problem persists or you still have errors in your log

[y-morozov]

Seems like all errors disappeared!

[y-morozov]

Actually one error still appears:

TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at /Users/user/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:210:29
    at Parser.<anonymous> (/Users/user/.atom/packages/php-debug/node_modules/xml2js/lib/parser.js:303:18)
    at emitOne (events.js:96:13)
    at Parser.emit (events.js:191:7)
    at Parser.exports.Parser.Parser.parseString (/Users/user/.atom/packages/php-debug/node_modules/xml2js/lib/parser.js:313:16)
    at Parser.parseString (/Users/user/.atom/packages/php-debug/node_modules/xml2js/lib/parser.js:5:59)
    at exports.parseString (/Users/user/.atom/packages/php-debug/node_modules/xml2js/lib/parser.js:354:19)
    at DbgpInstance.parseXml (/Users/user/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:206:13)
    at DbgpInstance.parse (/Users/user/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:183:12)
    at DbgpInstance.parse (/Users/user/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:189:14)
    at DbgpInstance.handleData (/Users/user/.atom/packages/php-debug/lib/engines/dbgp/dbgp-instance.js:264:10)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:191:7)
    at readableAddChunk (_stream_readable.js:178:18)
    at Socket.Readable.push (_stream_readable.js:136:10)
    at TCP.onread (net.js:560:20)