Factory Droid Crash: Illegal Instruction Error

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Factory Droid 0.22.3 Crashing with Illegal Instruction on Bun 1.3.0: A Deep Dive

Factory Droid 0.22.3 Crashing with Illegal Instruction on Bun 1.3.0: A Deep Dive

Hey everyone, let's dive into a frustrating issue some of us are hitting with Factory Droid version 0.22.3 when running on Bun 1.3.0. The problem? A nasty 'Illegal instruction' error that's causing the application to crash. If you're encountering this, you're not alone! This article is designed to help you understand the problem, figure out how to reproduce it, and hopefully, find a workaround or solution. We'll break down the error message, explore the stack trace, and give you a comprehensive overview of what's happening under the hood. So, buckle up, and let's get started. We'll cover everything from the initial error report to potential causes and steps you can take to mitigate the issue. This is especially relevant if you're using Factory Droid for any kind of automated tasks or workflows where stability is key.

First, let's clarify what this 'Illegal instruction' error actually means. In simple terms, it indicates that the program is trying to execute an instruction that the CPU doesn't know how to handle. This can happen for a variety of reasons, including software bugs, hardware incompatibility, or even corrupted code. In this specific case, the error is occurring within the context of Bun, the JavaScript runtime, while running Factory Droid. This means that the issue likely stems from a conflict or a bug in how Factory Droid interacts with Bun's core functionalities.

Let's get straight to the point: How do you reproduce this crash? The steps are pretty straightforward. First, you need to update your Factory Droid to version 0.22.3. The provided command curl -fsSL https://app.factory.ai/cli | sh does this. Once you've updated, simply try running droid. The output should show that the update was successful, but then BAM! The 'Illegal instruction' error will likely rear its ugly head. This suggests that the issue is directly related to the new version of Factory Droid and how it's interacting with Bun. This is important information because it tells us that the problem is specific to the version and is triggered upon simply running the application. Also, the crash happens consistently, which makes it easier to debug.

Now, let's zoom in on the relevant log output. The log shows us a few key things. First, it confirms that the update to version 0.22.3 was successful. Second, it gives us some information about the Bun environment, including the Bun version (1.3.0), the operating system (Linux), and the CPU architecture. It also provides a list of the features and built-in modules Bun is using. The most crucial part of the log is the error message itself: 'panic(main thread): Illegal instruction at address 0x3E8000633B9'. This points to the exact location in memory where the illegal instruction was encountered. The stack trace, which we'll analyze in more detail shortly, provides a roadmap of the code execution leading up to the crash. Furthermore, the log indicates that the 'Illegal instruction' error causes a core dump, meaning the system captures the memory state at the time of the crash. This core dump is vital for debugging as it contains all the information needed to pinpoint the cause of the problem. This combination of the environment information, error message, and core dump sets the stage for a thorough investigation of the root cause.

Dissecting the Stack Trace: Unraveling the Mystery

Alright, let's put on our detective hats and examine the stack trace. The stack trace is essentially a map of the function calls that were active when the crash occurred. Analyzing this map helps us understand the sequence of events that led to the 'Illegal instruction' error. The stack trace in the provided report is quite detailed, including references to various components of Bun, such as the JavaScriptCore (JSC) engine, the interpreter, and the event loop. The trace points us to specific lines of code, like Interpreter.cpp:1393 and CallData.cpp:69, which are inside the WebKit repository, which is what Bun uses for its JavaScript engine. We also see references to Bun::Process_functionKill, which hints at the potential involvement of process management within the crash. It is worth noting the frequent occurrences of llint_op_call_ignore_result and llint_call_javascript, which indicates that the issue may be related to the interpretation of JavaScript code. Additionally, the stack trace goes through JSNextTickQueue::drain, JSC__JSGlobalObject__drainMicrotasks, and finally, the event loop. From the stack trace, the crash seems to happen during the final steps of draining the microtasks queue, which is a common place to encounter issues in asynchronous operations. In short, the stack trace indicates that the error is likely happening during the execution of JavaScript code. Now, this stack trace is your primary clue. It gives you the roadmap of where the error is happening, but it might require deeper investigation to fully identify what is causing the error. Keep in mind that stack traces can sometimes be complex and require some familiarity with the codebase or related tools to completely understand them.

Potential Causes and Troubleshooting Steps

Now, let's explore some of the potential causes behind this 'Illegal instruction' error. Since the error is happening within Bun, the issue could be with Bun's code itself, or it could be with how Factory Droid is interacting with Bun. Here are some of the potential problems, alongside troubleshooting steps:

  1. Bun Bug: The most likely culprit is a bug within Bun itself. It's possible that the specific combination of code in Factory Droid and the way Bun is handling it triggers a flaw. If you suspect this, you should report the issue to the Bun team, including the detailed information you have like the crash report, stack trace, and steps to reproduce. Also, check for any known issues on the Bun repository, and see if others are experiencing similar problems. A workaround could be trying a different version of Bun to see if the issue is resolved.
  2. Code Compatibility: It's also possible that there is an incompatibility between Factory Droid and Bun 1.3.0. This could mean the Factory Droid code uses features or patterns that aren't fully supported by the specific Bun version. To troubleshoot this, you can try: a) Checking the Factory Droid documentation or release notes for compatibility information. b) Reviewing the Factory Droid code to see if there are any suspicious calls, especially those that might interact deeply with Bun internals. c) If possible, consider reaching out to the Factory Droid developers to see if they are aware of the issue or have suggestions.
  3. Hardware Incompatibility: Though less likely, there could be a hardware-related issue. The 'Illegal instruction' error suggests that the CPU is being asked to execute an instruction it doesn't recognize. This could happen if Bun or Factory Droid uses instruction set extensions (like AVX) that aren't supported by your CPU. To check this: a) Verify your CPU's capabilities by checking the CPU model and specifications. b) See if Bun has any options to disable certain instruction set extensions to test compatibility. c) Ensure your system's BIOS and firmware are up to date.
  4. Corrupted Installation: Sometimes, software installations can become corrupted. If you suspect this, try the following steps: a) Reinstall Bun: Completely uninstall Bun and then reinstall it to ensure a clean installation. b) Reinstall Factory Droid: Try reinstalling Factory Droid. Make sure to follow the official installation instructions to prevent any errors. c) Update System Packages: Ensure that all your system libraries and dependencies are up-to-date. Outdated libraries can sometimes cause compatibility issues.

Reporting the Bug: Helping the Community

Okay, so you've experienced this 'Illegal instruction' error, and you've tried the troubleshooting steps. What should you do next? The most important step is to report the bug. As the crash report suggests, you should file a GitHub issue with the Bun team. This helps them fix the problem and benefits the wider community. When you file the issue, make sure to include as much detail as possible, such as:

  • The exact versions of Bun and Factory Droid you are using.
  • The steps to reproduce the error (which we have already defined).
  • The relevant log output (which we have already).
  • The stack trace (which we have).
  • Any troubleshooting steps you've tried and their results.
  • Information about your operating system and hardware.

By providing this information, you're making it easier for the Bun developers to understand the issue and create a fix. You can also try reaching out to the Factory Droid developers, as well. They might have a solution or additional insight into how their code interacts with Bun.

Workarounds and Temporary Solutions

While waiting for a permanent fix, there might be workarounds you can employ to mitigate the issue. Keep in mind that these are temporary solutions and may not work for everyone. First, try using an older version of Bun. If the issue started after upgrading to Bun 1.3.0, reverting to a previous version might resolve the crash. Second, you can try a different version of Factory Droid. If the issue is specific to Factory Droid 0.22.3, check if older or newer versions of Droid are stable. Third, try to isolate the issue. If you know what part of your code is causing the problem, try to comment out sections of your code that are causing the error. By identifying the exact line of code or function that is causing the problem, you might be able to find a workaround for your specific use case. These workarounds can allow you to keep working while you wait for a fix.

Conclusion: Moving Forward

So, we've covered the 'Illegal instruction' error in Factory Droid 0.22.3 with Bun 1.3.0 in detail. We've examined the error message, the stack trace, potential causes, and troubleshooting steps. Remember, the key takeaways are to report the bug to the Bun team, provide detailed information, and try any available workarounds. Keep an eye on the Bun repository and any related forums for updates. The collaborative effort of reporting, diagnosing, and fixing these kinds of issues is crucial to the ongoing development of the software. Let's work together to make sure that Factory Droid and Bun run smoothly! Remember to check the official documentation and the Bun and Factory Droid communities for any further updates and assistance. Good luck, and happy coding!