From 261a63ccc01e53f757a79936fbd9d6df463013fd Mon Sep 17 00:00:00 2001
From: Jonathan Amsterdam <jba@users.noreply.github.com>
Date: Mon, 28 Jul 2025 10:29:59 -0400
Subject: [PATCH] mcp: don't panic on bad JSON RPC input (#177)

Log internal errors from the jsonprc2 package, instead of panicking.

Fixes #175.
---
 mcp/transport.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mcp/transport.go b/mcp/transport.go
index a7de506..0441c61 100644
--- a/mcp/transport.go
+++ b/mcp/transport.go
@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log"
 	"net"
 	"os"
 	"sync"
@@ -120,6 +121,7 @@ func connect[H handler](ctx context.Context, t Transport, b binder[H]) (H, error
 		OnDone: func() {
 			b.disconnect(h)
 		},
+		OnInternalError: func(err error) { log.Printf("jsonrpc2 error: %v", err) },
 	})
 	assert(preempter.conn != nil, "unbound preempter")
 	h.setConn(conn)