Merge remote-tracking branch 'origin/master' into rsgowman/protobuf_cpp

Also "fixed" BadFieldValueTagWithOtherValidTagsPresent test by changing
'false' to 'true'. Details: Depending on the version of nanopb, nanopb
would explicitly encode 'false', which shouldn't be done in proto3. When
it's explicitly encoded, the test worked properly. But when it was
(properly) dropped, the invalid tag is the only field that's actually
encoded, thus violating the assumptions of the test, leading to a test
failure. s/false/true fixes it, as now the boolean_value field is
(properly) encoded regardless of version.

1 files changed, 13 insertions, 1 deletions

diff --git a/Firebase/Auth/Source/FIRAuth.m b/Firebase/Auth/Source/FIRAuth.m
index c83a19a..81008ca 100644
--- a/Firebase/Auth/Source/FIRAuth.m
+++ b/Firebase/Auth/Source/FIRAuth.m
@@ -19,6 +19,7 @@
 #import "FIRAuth_Internal.h"
 
 #import <FirebaseCore/FIRAppAssociationRegistration.h>
+#import <FirebaseCore/FIRAppEnvironmentUtil.h>
 #import <FirebaseCore/FIRAppInternal.h>
 #import <FirebaseCore/FIRLogger.h>
 #import <FirebaseCore/FIROptions.h>
@@ -438,7 +439,18 @@ static NSMutableDictionary *gKeychainServiceNameForAppName;
     _settings = [[FIRAuthSettings alloc] init];
     _firebaseAppName = [appName copy];
     #if TARGET_OS_IOS
-    UIApplication *application = [UIApplication sharedApplication];
+
+    static Class applicationClass = nil;
+    // iOS App extensions should not call [UIApplication sharedApplication], even if UIApplication
+    // responds to it.
+    if (![FIRAppEnvironmentUtil isAppExtension]) {
+      Class cls = NSClassFromString(@"UIApplication");
+      if (cls && [cls respondsToSelector:NSSelectorFromString(@"sharedApplication")]) {
+        applicationClass = cls;
+      }
+    }
+    UIApplication *application = [applicationClass sharedApplication];
+
     // Initialize the shared FIRAuthAppDelegateProxy instance in the main thread if not already.
     [FIRAuthAppDelegateProxy sharedInstance];
     #endif