Deleting an n use image should return conflict not system error

Fixes: containers#14208

Signed-off-by: Daniel J Walsh <[email protected]>

pkg/api/handlers/compat/images_remove.go

@@ -52,7 +52,10 @@ func RemoveImage(w http.ResponseWriter, r *http.Request) {
 			utils.ImageNotFound(w, name, errors.Wrapf(err, "failed to find image %s", name))
 			return
 		}
-
+		if errors.Cause(err) == storage.ErrImageUsedByContainer {
+			utils.Error(w, http.StatusConflict, errors.Wrapf(err, "image %s is in use", name))
+			return
+		}
 		utils.Error(w, http.StatusInternalServerError, err)
 		return
 	}

test/apiv2/10-images.at

@@ -156,6 +156,17 @@ t GET images/json?filters='{"reference":["test1"]}' 200 length=1
 
 t DELETE libpod/images/test1:latest 200
 
+# to be used in prune until filter tests
+podman image build -t docker.io/library/test1:latest -<<EOF
+from alpine
+RUN >file4
+EOF
+podman create --name test1 test1 echo hi
+
+t DELETE images/test1:latest 409
+podman rm test1
+t DELETE images/test1:latest 200
+
 t GET "images/get?names=alpine" 200 '[POSIX tar archive]'
 
 podman pull busybox