internal/warpc: Fix SIGSEGV in Close() when dispatcher fails to start

Only set started=true when Start() succeeds, so Close() doesn't
attempt to close a nil dispatcher.

Fixes #14536

diff --git a/internal/warpc/warpc.go b/internal/warpc/warpc.go
index e62e6b09ea7fed7d2eb5d09e4dc31bc73385395f..58dcf5dc7d873f7fc3200fd745e68badac9229c4 100644 (file)
--- a/internal/warpc/warpc.go
+++ b/internal/warpc/warpc.go
@@ -776,8 +776,10 @@ func (d *lazyDispatcher[Q, R]) start() (Dispatcher[Q, R], error) {
        d.startOnce.Do(func() {
                start := time.Now()
                d.dispatcher, d.startErr = Start[Q, R](d.opts)
-               d.started = true
-               d.opts.Infof("started dispatcher in %s", time.Since(start))
+               if d.startErr == nil {
+                       d.started = true
+                       d.opts.Infof("started dispatcher in %s", time.Since(start))
+               }
        })
        return d.dispatcher, d.startErr
 }