test: add direct node evaluation test to achieve 100% patch coverage in tree.go

context_test.go

@@ -3992,7 +3992,13 @@ func TestWildcardParamUnicodeConcurrency(t *testing.T) {
 		go func() {
 			defer wg.Done()
 			for _, p := range paths {
-				req, _ := http.NewRequest(http.MethodGet, p, nil)
+				req, err := http.NewRequest(http.MethodGet, p, nil)
+				if err != nil {
+					mu.Lock()
+					errs = append(errs, "failed to create request: " + err.Error())
+					mu.Unlock()
+					continue
+				}
 				w := httptest.NewRecorder()
 				router.ServeHTTP(w, req)
 

tree_test.go

@@ -1111,3 +1111,20 @@ func TestTreeFindCaseInsensitivePathWildcardParamAndStaticChild(t *testing.T) {
 		t.Errorf("Wrong result for '/prefix/something': %s", string(out))
 	}
 }
+
+func TestTreeWildcardParamImproperBoundaryCoverage(t *testing.T) {
+	tree := &node{}
+
+	// Register a path with a wild named parameter segment
+	tree.addRoute("/submit/:info", HandlersChain{func(c *Context) {}})
+
+	// Pass a path containing a multi-byte sequence where a standard byte segment lookup
+	// drifts directly into the middle of a continuation block.
+	// This exercises our inner boundary alignment decrement loop.
+	path := "/submit/जय"
+	value := tree.getValue(path, &Params{}, nil, false)
+
+	if value.handlers == nil {
+		t.Errorf("Routing fallback failed on multi-byte parameter verification evaluation.")
+	}
+}