Only release current_breakpad_ if it is defined.

src/client/ios/Breakpad.mm

 // Copyright (c) 2011, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 245 matching lines @@
     return false;
 
   return breakpad->HandleMinidump(dump_dir, minidump_id);
 }
 
 //=============================================================================
 void Breakpad::UncaughtExceptionHandler(NSException *exception) {
   NSSetUncaughtExceptionHandler(NULL);
   if (current_breakpad_) {
     current_breakpad_->HandleUncaughtException(exception);
+    BreakpadRelease(current_breakpad_);
   }
-  BreakpadRelease(current_breakpad_);
 }
 
 //=============================================================================
 #pragma mark -
 
 //=============================================================================
 bool Breakpad::Initialize(NSDictionary *parameters) {
   // Initialize
   current_breakpad_ = this;
   config_params_ = NULL;
@@ skipping 629 matching lines @@
     if (breakpad) {
       return breakpad->GenerateReport(server_parameters);
     } else {
       return nil;
     }
   } catch(...) {    // don't let exceptions leave this C API
     fprintf(stderr, "BreakpadGenerateReport() : error\n");
     return nil;
   }
 }