Using right-click 'Jump to declaration' menu item causes Processing to lock-up in some sketches.

Created by: matkeane

Description

Using right-click 'Jump to declaration' menu item causes Processing to lock-up in some sketches.

When selecting a variable or function name in the UI and clicking on 'Jump to declaration' Processing locks up - No error is shown in the console but the UI becomes unresponsive, menus no longer open and windows cannot be opened or closed. I did wonder if things were just slow, but 10-15 minutes later, Activity Monitor shows Processing as 'not responding' but using between 25-25% CPU.

I first noticed the problem when working on my own projects, so it's quite possible there's something horrible about my code which is triggering this (my current project has a few thousand lines of code in 28 files, so quite likely I guess). Having said that, the same project didn't trigger this problem using Processing 3.5.4, I only encountered this after opening the project in Processing 4. Different versions of the project compile and run without errors under versions 3 & 4 of Processing.

While the problem doesn't occur when opening single-tab examples or sketches, it does happen with some of the multi-file example code from the 'Generative Design' book, but doesn't occur when testing a sketch by Marius Watz in 2 tabs.

In addition to controlP5 (which doesn't trigger the error in other sketches) my current project imports the following libraries:

import java.util.Locale;
import java.awt.datatransfer.*;
import java.awt.Toolkit;
import java.io.FileInputStream; // File Streams.
import java.io.FileOutputStream;
import java.util.UUID;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

Expected Behavior

In Processing 3, the 'Jump to declaration' menu item would jump straight to the appropriate variable/function declaration.

Current Behavior

In version 4, 'Jump to declaration' sometimes causes Processing to become unresponsive.

Steps to Reproduce

Some of the sketches which trigger the problem import external libraries, but I haven't found a sketch (other than my own) which always triggers the problem.

Your Environment

• Processing version: Processing 4.0b8
• Operating System and OS version: Mac OS 10.15.7

首先，在 macOS 上使用多文件草图（包括 Generative Design 示例）复现 Processing 4.0b8 中的卡死，并比较在 Processing 3.5.4 中执行相同操作的结果。调查应缩小范围，确定是哪个草图或导入模式触发了故障；完成的标准是“Jump to declaration”保持响应并到达声明处。