# WebView Dubug Build Fails to Load with SIGSEGV **URL:** \ **Category:** Bug Reports\ **Created:** [January 28, 2026, 7:57am UTC](https://community.amazondeveloper.com/t/webview-dubug-build-fails-to-load-with-sigsegv/27431 "2026-01-28T07:57:19Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![amit](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@amit](https://community.amazondeveloper.com/u/amit)\ **Post date:** [January 28, 2026, 7:57am UTC](https://community.amazondeveloper.com/t/webview-dubug-build-fails-to-load-with-sigsegv/27431/1 "2026-01-28T07:57:19Z")
# ⚠ Before you continue * * * _Before submitting a bug report, please review our troubleshooting documentation at [Troubleshoot Issues | Vega Troubleshooting](https://developer.amazon.com/docs/vega/0.21/troubleshoot-overview.html)_ _If you still want to file a bug report, please make sure to fill in all the details below and provide the necessary information._ **NOTE: PLEASE ONLY REPORT A SINGLE BUG USING THIS TEMPLATE.** _If you’re experiencing multiple issues, please file a separate report for each._ * * * # 👉 Bug Description * * * ## 1. Summary The WebView-based app fails to load when built in **Debug mode** , crashing with a **SIGSEGV** error. However, **the same app works correctly when built in Release mode**. This behavior is **consistently reproducible across all developers on the team** , and has been verified using: - Vega CLI - VS Code Vega Extension **App Name** : **App Link on Amazon Appstore** : **Bug Severity** Select one that applies - Impacts operation of app - Blocks current development - Improvement suggestion - Issue with documentation (If selected, please share the doc link and describe the issue) - Other ## 2. Steps to Reproduce 1. Clone the project and install dependencies. 2. Build and run the app in **Debug mode** using: - Vega CLI **or** - VS Code Vega Extension. 3. Launch the app. 4. Observe that the app crashes or WebView fails to load with a **SIGSEGV** error. 5. Build and run the **same codebase in Release mode**. 6. Observe that the app loads and functions correctly. **Note:** This issue occurs **for every developer on the team** , on multiple machines.`]` ## 3. Observed Behavior _Explain what actually happened, noting any discrepancies or malfunctions._ ```auto App crashes or WebView fails to load when running a Debug build. Crash is accompanied by a SIGSEGV error. Issue is reproducible 100% of the time in Debug mode. No crash occurs in Release mode; the app works as expected. ``` ## 4. Expected Behavior _Describe what you expected the SDK to do under normal operation._ ```auto The app should load and function correctly in both Debug and Release modes. Debug builds should not crash or fail to load the WebView. ``` ### 4.a Possible Root Cause & Temporary Workaround _Fill out anything you have tried. If you don’t know, N/A is acceptable_ ```auto May be related to Debug-specific configuration, symbols, or runtime differences in Vega / WebView handling. ``` ## 5. Logs or crash report _**`(Please make sure to provide relevant logs as attachment)`**_ For crash issues, please refer this guide for faster troubleshooting: [Detect Where the App Crash Originates | Design and Develop Vega Apps](https://developer.amazon.com/docs/vega/0.21/detect-crash.html) - [App/Device Logs](https://developer.amazon.com/docs/vega/0.21/logs.html) - [Crash Logs](https://developer.amazon.com/docs/vega/0.21/loggingctl.html) - [Crash Report](https://developer.amazon.com/docs/vega/0.21/crash-report.html) - For issues with Kepler Studio Extension, please share log files from below folders: ## 6. Environment _Please fill out the fields related to your bug below:_ - **SDK Version:** Active SDK Version: 0.22.5600 Vega CLI Version: 1.2.13 - **App State:** `[Foreground]` - **OS Information** Please ssh into the device via `kepler exec vda shell`and copy the output from `cat /etc/os-release`into the answer section below. _Note, if you don’t have a simulator running or device attached `kepler exec vda shell` will respond with `vda: no devices/emulators found`_ **Q: Are there any special headers required to reproduce the issue you are facing?** ```auto [N/A or Insert Headers] ``` **Additionally please provide the following if possible** _Provide Screenshots / Screengrabs / Logs. Please include as much information as you can that will help debug._ ```auto ``` ![Screenshot 2026-01-28 at 11.16.54](https://d3mq594dkmpl37.cloudfront.net/original/2X/f/f423be404f31b0d35dff9757ca4b557cf38eb9c2.png) * * * ## 👉 Additional Context * * * **Any Additional Context you would like to provide?** _Add any other relevant information, such as recent updates to the SDK, dependencies, or device OS that may affect the bug._ ```auto ``` ---
**Author:** ![amen](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@amen](https://community.amazondeveloper.com/u/amen)\ **Post date:** [January 28, 2026, 8:29pm UTC](https://community.amazondeveloper.com/t/webview-dubug-build-fails-to-load-with-sigsegv/27431/3 "2026-01-28T20:29:14Z")
Hi @amit, Thank you for the detailed bug report on the WebView Debug Build SIGSEGV crash issue. Our team is investigating this issue and will provide an update as soon as we have more information. Thanks for helping us improve the Vega platform. Warm regards, Aishwarya ---
**Author:** ![amen](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@amen](https://community.amazondeveloper.com/u/amen)\ **Post date:** [February 6, 2026, 7:08pm UTC](https://community.amazondeveloper.com/t/webview-dubug-build-fails-to-load-with-sigsegv/27431/4 "2026-02-06T19:08:26Z")
Hi @amit, The crash was caused by duplicate package instances remaining in your bundle after the migration from `@amzn` to `@amazon-devices`. The debug build was resolving to the stale `@amzn` instance, which had an uninitialized `rootTag` value of 0, causing the crash. **Solution:** 1. Move all packages to use `@amazon-devices` 2. Remove `package-lock.json` 3. Perform a clean build Feel free to reach back to me if you have any questions! Thanks for helping us improve the Vega platform. Warm regards, Aishwarya ---
**Author:** ![system](https://dhm3gbtzu79o6.cloudfront.net/user_avatar/community.amazondeveloper.com/system/32/5065_2.png) [@system](https://community.amazondeveloper.com/u/system)\ **Post date:** [February 20, 2026, 7:08pm UTC](https://community.amazondeveloper.com/t/webview-dubug-build-fails-to-load-with-sigsegv/27431/5 "2026-02-20T19:08:32Z")
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