21617634: App crashes when loading a UIWebView on UIWebFormDelegate

[openradar-mirror]

Description

Summary:
My app loads a UIWebView, which is a login web screen. When the UIWebView is being loaded the app crashes.

Steps to Reproduce:
Unable to reproduce

Expected Results:
Should not crash.

Actual Results:
The app crashes as the UIWebView is loaded. The stack trace is as follows.
{
"StackTrace" : [
"#0 Inpatient 0X001A508F +[Logging signalHandler:]",
"#1 Inpatient 0X00183051 -[NSURL portByScheme]",
"#2 libsystem_platform.dylib 0X37A5D0A3 _sigtramp()",
"#3 UIKit 0X2CA72FAF -[UIWebFormDelegate didFocusTextField:inFrame:]",
"#4 CoreFoundation 0X28FFA854 ()",
"#5 CoreFoundation 0X28F24FED -[NSInvocation invoke]",
"#6 WebCore 0X34C246E9 ()",
"#7 CoreFoundation 0X28FBC22F ()",
"#8 CoreFoundation 0X28FBB6D5 ()",
"#9 CoreFoundation 0X28FB9CC1 ()",
"#10 CoreFoundation 0X28F059A1 CFRunLoopRunSpecific()",
"#11 CoreFoundation 0X28F057B3 CFRunLoopRunInMode()",
"#12 GraphicsServices 0X306B51A9 GSEventRunModal()",
"#13 UIKit 0X2C690695 UIApplicationMain()",
"#14 Inpatient 0X000F365F -[InpatientAppDelegate openChartSummaryAfterLoginWithPatient:andEncounter:]",
"#15 libdyld.dylib 0X3791BAAF ()"
]
}

Version:
iOS 8.3, iOS 8.1.3

Configuration:
iPad 2, iPhone 6+

Product Version: iOS 8.3
Created: 2015-06-30T20:27:08.535840
Originated: 2015-04-30T00:00:00
Open Radar Link: http://www.openradar.me/21617634