[sql] Database recovery system for Shortcuts.

sql/connection.cc

Index: sql/connection.cc
diff --git a/sql/connection.cc b/sql/connection.cc
index b1be62f586a782d64fca587e671254f912e29493..31c17e92b52c22041ae25ba48b9b01719e552ef9 100644
--- a/sql/connection.cc
+++ b/sql/connection.cc
@@ -266,8 +266,9 @@ void Connection::set_mmap_disabled_by_default() {
 void Connection::ReportDiagnosticInfo(int extended_error, Statement* stmt) {
   AssertIOAllowed();
 
-  std::string debug_info;
+  // Trim extended error codes.
   const int error = (extended_error & 0xFF);
+  std::string debug_info;
   if (error == SQLITE_CORRUPT) {
     // CollectCorruptionInfo() is implemented in terms of sql::Connection,
     // prevent reentrant calls to the error callback.