Under the hood
A bug that could crash MCP auth-error logging with a stray exception has been fixed
What
When Claude Code logs telemetry for an MCP tool call that failed with a 401 authentication error, the logging call was accidentally wrapped in a throw, which meant it threw an undefined value instead of just recording the telemetry and letting normal error handling continue. That stray throw has been removed.
Why
This fixes a bug where recording an MCP authentication-error telemetry event could itself throw an unexpected error, potentially interfering with the normal handling of that error.