Bug in Google Analytics for Firebase crashed thousands of iOS apps

A bug in Google Analytics for Firebase iOS caused thousands of apps to crash on launch. Google fixed it within a couple of hours, but caching kept some apps crashing for up to four hours; some saw crash rates over 5,000 times normal.

• Bug in Google Analytics for Firebase iOS crashed apps on launch
• Google shipped a fix within a couple of hours after developer reports
• Caching kept some apps crashing up to 4 hours after the fix
• Some apps saw crash numbers over 5,000 times higher than normal