Rcon SQL Query Crashes Dedicated Server

Game mode: Online Private
Type of issue: Server Crash
Server type: Any
Region: NA

When using RCON to send SQL queries to a dedicated server, the server will crash under the following conditions.

  1. The query is a “select” statement
  2. The result of the query would contain at least one row where at least one of the columns has a null value

From server log:
[2020.05.25-19.45.49:803][761]LogWindows:Error: === Critical error: ===
[2020.05.25-19.45.49:805][761]LogWindows:Error: Fatal error!
[2020.05.25-19.45.49:806][761]LogWindows:Error: Unhandled Exception:
EXCEPTION_ACCESS_VIOLATION reading address 0x00000000
[2020.05.25-19.45.49:806][761]LogWindows:Error: !0x0000000000000000

Please provide a step-by-step process of how the bug can be reproduced. The more details you provide us with the easier it will be for us to find and fix the bug:

  1. Run a dedicated server with Rcon enabled
  2. Ensure there is at least one character created on the server that is not in a clan
  3. Connect to the server using an Rcon client (such as mcrcon 0.0.5)
  4. Run the following command from the connected Rcon client.
    sql select * from characters
  5. The server will crash and never respond to the Rcon client (because the guild and rank columns have null values)

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