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If your app started crashing after you installed a crash reporter, treat the new integration as a strong suspect—but not a proven cause. Compare the failing build with the last known working build, capture the first failure’s complete stack trace, and confirm whether the process really terminated or the reporter merely recorded an error.
First, establish what “crashed” means
A crash-reporting dashboard can show an unhandled error even when the app process did not terminate. Sentry’s help article warns that “An unhandled error does not always mean the application crashed.” Check the device or operating system’s process logs and reproduce the issue: did the app close, become unresponsive, or continue running after logging an event? The answer changes what you should investigate. Sentry explains how to assess whether an unhandled event caused a crash; exact indicators depend on the SDK and platform.
Capture the first failure and compare builds
- Reproduce the problem. Record the exact steps, device or emulator, operating system version, and whether the failure happens on every launch or only after a particular action.
- Save the complete first stack trace. Include the exception type, message, frames, and nearby system logs. The earliest failure is usually more useful than follow-on errors produced during shutdown or retries.
- Compare against the last working build. Identify the reporter, version, dependency changes, initialization code, configuration, and other changes introduced together. The timing makes the reporter worth investigating, but does not prove it caused the crash.
- Check when the failure occurs. A failure before SDK initialization points to a different area than one during initialization or after the app has started. Use the stack trace and startup logs to locate it.
Check initialization order and exception-handler conflicts
Crash reporters may register handlers for exceptions, and interactions with another SDK can matter. Firebase documents one specific case: when an app uses both Crashlytics and Google Mobile Ads, their crash reporters may interfere while registering exception handlers. Firebase’s troubleshooting guidance recommends disabling Mobile Ads SDK crash reporting with disableSDKCrashReporting for that combination. This is a targeted mitigation for the documented setup, not a general fix for apps using other reporters or SDKs. See Firebase’s Crashlytics troubleshooting guidance.
For your own app, list the SDKs initialized at startup and check whether more than one installs exception handlers. Verify the setup instructions for the exact platform and versions in use; do not apply an Android setting to an iOS or other-framework integration.
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Use a controlled test to isolate the change
- Build the smallest version that reproduces the failure and includes the reporter.
- Temporarily remove or disable the reporter, keeping other code and configuration unchanged, then reproduce the same steps.
- If behavior changes, reintroduce the reporter and related configuration in small increments. This can distinguish an SDK integration problem from a simultaneous dependency, initialization, or configuration change.
- Keep the failing and working logs together. If removing the reporter does not change the failure, widen the comparison to the other changes in the failing build.
A successful comparison narrows the investigation; it does not, by itself, identify the faulty component. Avoid changing several settings at once, because that makes the result harder to interpret.
Keep test-crash reporting separate from startup diagnosis
Firebase’s Android setup guide describes forcing a test crash and then restarting the app so the report can be sent. That restart is part of the Android report-delivery workflow; it does not explain why an app is crashing on startup. Follow Firebase’s Android-specific setup guide only when configuring Crashlytics for Android, and use the relevant vendor documentation for other platforms.
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What to include when asking for help
- Platform and operating system version, plus the app framework and its version.
- Crash reporter name and version, and the steps used to integrate it.
- Other SDKs initialized at startup, especially any that handle or report crashes.
- Recent dependency, configuration, and initialization-order changes.
- Exact reproduction steps, whether the process exits or hangs, and the complete first stack trace with relevant logs.
Without these details, the specific cause cannot be determined. A report’s presence, or the fact that the failure followed installation, is not enough to identify the root cause.
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A crash reporter collects information about app failures so developers can investigate them. Firebase describes Crashlytics as a service that captures app crash information through SDK integration and automatic collection; that purpose does not mean every event shown in a dashboard represents a process-ending crash. See Firebase’s Crashlytics overview.
Quick Recap
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