Missing or corrupted database

Oct 13, 2025 by wbrum.org 105 views

Introduction

When building ALCOM from source and searching for Unity installs, users may encounter an error. This error is caused by a panic in the tokio-runtime-worker thread, indicating that an Option::unwrap() call was made on a None value. In this article, we will delve into the details of this error, explore the steps to reproduce it, and discuss the expected behavior.

Description of the Bug

The error occurs when searching for Unity installs in ALCOM. The stacktrace indicates that the panic is caused by an Option::unwrap() call on a None value in the snapshot.rs file. This file is part of the litedb-rs crate, which is used by ALCOM for database operations.

thread 'tokio-runtime-worker' panicked at 'called `Option::unwrap()` on a `None` value': /home/cloud/.cargo/git/checkouts/litedb-rs-4bd1a2e8af577a9c/a09eb14/src/engine/snapshot.rs:906

Steps to Reproduce

To reproduce this error, follow these steps:

Build ALCOM: Build ALCOM from source using the provided instructions.
Run ALCOM: Run ALCOM using the alcom command.
Search for Unity: Search for Unity installs using the Unity Hub.

Expected Behavior

The expected behavior is that ALCOM should detect and add the Unity 2022.3.22f1 installation.

Screenshots

A screenshot of the error is provided below:

Software Version

The software version of ALCOM is 1.9.0.

OS

The operating system used is Linux Mint Debian Edition 6 Faye.

Webview Version

The webview version is not provided.

Additional Context

No additional context is provided.

Possible Causes

Based on the stacktrace, the possible causes of this error are:

Missing or corrupted database: The error may be caused by a missing or corrupted database, which is used by ALCOM for Unity installation detection.
Incorrect Unity installation path: The error may be caused by an incorrect Unity installation path, which is used by ALCOM to detect Unity installations.
Tokio runtime issue: The error may be caused by an issue with the tokio runtime, which is used by ALCOM for asynchronous operations.

Troubleshooting Steps

To troubleshoot this error, follow these steps:

Check database integrity: Check the integrity of the database used by ALCOM for Unity installation detection.
Verify Unity installation path: Verify the Unity installation path used by ALCOM to detect Unity installations.
Update tokio runtime: Update the tokio runtime used by ALCOM to the latest version.

Conclusion

Q: What is the error when searching for Unity installs in ALCOM?

A: The error occurs when searching for Unity installs in ALCOM, causing a panic in the tokio-runtime-worker thread due to an Option::unwrap() call on a None value.

Q: What are the possible causes of this error?

A: The possible causes of this error are:

Missing or corrupted database: The error may be caused by a missing or corrupted database, which is used by ALCOM for Unity installation detection.
Incorrect Unity installation path: The error may be caused by an incorrect Unity installation path, which is used by ALCOM to detect Unity installations.
Tokio runtime issue: The error may be caused by an issue with the tokio runtime, which is used by ALCOM for asynchronous operations.

Q: How can I troubleshoot this error?

A: To troubleshoot this error, follow these steps:

Check database integrity: Check the integrity of the database used by ALCOM for Unity installation detection.
Verify Unity installation path: Verify the Unity installation path used by ALCOM to detect Unity installations.
Update tokio runtime: Update the tokio runtime used by ALCOM to the latest version.

Q: What are the system requirements for ALCOM?

A: The system requirements for ALCOM are:

Operating System: Linux Mint Debian Edition 6 Faye
Software Version: 1.9.0
Webview Version: Not provided

Q: How can I update ALCOM to the latest version?

A: To update ALCOM to the latest version, follow these steps:

Check for updates: Check the ALCOM website for updates.
Download the latest version: Download the latest version of ALCOM.
Install the latest version: Install the latest version of ALCOM.

Q: What are the benefits of using ALCOM?

A: The benefits of using ALCOM are:

Easy Unity installation detection: ALCOM can easily detect Unity installations.
Asynchronous operations: ALCOM uses asynchronous operations to improve performance.
Database operations: ALCOM uses database operations to store and retrieve data.

Q: How can I contact the ALCOM support team?

A: To contact the ALCOM support team, follow these steps:

Visit the ALCOM website: Visit the ALCOM website.
Contact the support team: Contact the support team using the contact form or email.

Q: What are the common issues with ALCOM?

A: The common issues with ALCOM are:

Error when searching for Unity installs: The error occurs when searching for Unity installs in ALCOM.
Missing or corrupted database: The error may be caused by a missing or corrupted database.
Incorrect Unity installation path: The error may be caused by an incorrect Unity installation path.

Q: How can I resolve the common issues with ALCOM?

A: To resolve the common issues with ALCOM, follow these steps:

Check database integrity: Check the integrity of the database used by ALCOM for Unity installation detection.
Verify Unity installation path: Verify the Unity installation path used by ALCOM to detect Unity installations.
Update tokio runtime: Update the tokio runtime used by ALCOM to the latest version.