Merge a7b757e33830094fcb2af6156cb963a96e87a47b into b2b489dbf4826c2c630717a77fd5e42774625410

gin.go

@@ -677,13 +677,17 @@ func (engine *Engine) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	// If we're using internalContext then we need to pass on errors from the request context
 	if c.useInternalContext() {
 		reqCtx := req.Context()
+
+		// we need to get the cancelCause function now, so that we have the function for this request
+		// because the c is a pointer to a Context that will possibly go back into the pool and be reused
+		c.internalContextMu.RLock()
+		cancelCause := c.internalContextCancelCause
+		c.internalContextMu.RUnlock()
+
 		go func() {
 			<-reqCtx.Done()
 			if err := reqCtx.Err(); err != nil {
-				c.internalContextMu.RLock()
-				defer c.internalContextMu.RUnlock()
-
-				c.internalContextCancelCause(err)
+				cancelCause(err)
 			}
 		}()
 	}