The MCP Rust SDK's SSE reconnect backoff could overflow and panic
GitHub·low signal
PR #1231 in modelcontextprotocol/rust-sdk, merged 2026-09-09, saturates the exponential reconnect backoff to avoid an overflow panic, meaning a client that kept failing to reconnect to an SSE transport would eventually crash rather than keep retrying. It was one of only five merged PRs across the entire modelcontextprotocol org in the 24-hour window and the only substantive one, with the conformance repo at zero.