Panic in FakeClient if objects fail to add

User code may use this fake client in tests without setting up logging,
making errors here extremely difficult to track down. Panic logs more
reliably with better debugging details.

pkg/client/fake/client.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"os"
 	"strings"
 
 	"k8s.io/apimachinery/pkg/api/meta"
@@ -32,14 +31,9 @@ import (
 
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
-	logf "sigs.k8s.io/controller-runtime/pkg/internal/log"
 	"sigs.k8s.io/controller-runtime/pkg/internal/objectutil"
 )
 
-var (
-	log = logf.RuntimeLog.WithName("fake-client")
-)
-
 type fakeClient struct {
 	tracker testing.ObjectTracker
 	scheme  *runtime.Scheme
@@ -63,9 +57,7 @@ func NewFakeClientWithScheme(clientScheme *runtime.Scheme, initObjs ...runtime.O
 	for _, obj := range initObjs {
 		err := tracker.Add(obj)
 		if err != nil {
-			log.Error(err, "failed to add object to fake client", "object", obj)
-			os.Exit(1)
-			return nil
+			panic(fmt.Errorf("failed to add object %v to fake client: %v", obj, err))
 		}
 	}
 	return &fakeClient{