Fix FCM build warning introduced in Xcode 9 (#546)

1 files changed, 7 insertions, 3 deletions

diff --git a/Firebase/Messaging/FIRMessagingRmq2PersistentStore.m b/Firebase/Messaging/FIRMessagingRmq2PersistentStore.m
index a85298c..e468333 100644
--- a/Firebase/Messaging/FIRMessagingRmq2PersistentStore.m
+++ b/Firebase/Messaging/FIRMessagingRmq2PersistentStore.m
@@ -104,9 +104,13 @@ typedef void(^FCMOutgoingRmqMessagesTableHandler)(int64_t rmqId, int8_t tag, NSD
 
 // Utility to create an NSString from a sqlite3 result code
 NSString * _Nonnull FIRMessagingStringFromSQLiteResult(int result) {
-  const char *errorStr = sqlite3_errstr(result);
-  NSString *errorString = [NSString stringWithFormat:@"%d - %s", result, errorStr];
-  return errorString;
+  const char *errorStr;
+  if (@available(iOS 8.2, *)) {
+    errorStr = sqlite3_errstr(result);
+  } else {
+    errorStr = "pre iOS 8.2";
+  }
+  return [NSString stringWithFormat:@"%d - %s", result, errorStr];
 }
 
 @interface FIRMessagingRmq2PersistentStore () {