Fix for Daemon crashing when wildcards are used for COPY/ADD

in the filename and the command itself

Closes #12267

Signed-off-by: Doug Davis <dug@us.ibm.com>

integration-cli/docker_cli_build_test.go

@@ -1113,10 +1113,10 @@ func (s *DockerSuite) TestBuildCopyWildcard(c *check.C) {
 			"dir/nested_dir/nest_nest_file": "2 times nested",
 			"dirt": "dirty",
 		})
-	defer ctx.Close()
 	if err != nil {
 		c.Fatal(err)
 	}
+	defer ctx.Close()
 
 	id1, err := buildImageFromContext(name, ctx, true)
 	if err != nil {
@@ -1155,6 +1155,31 @@ func (s *DockerSuite) TestBuildCopyWildcardNoFind(c *check.C) {
 
 }
 
+func (s *DockerSuite) TestBuildCopyWildcardInName(c *check.C) {
+	name := "testcopywildcardinname"
+	defer deleteImages(name)
+	ctx, err := fakeContext(`FROM busybox
+	COPY *.txt /tmp/
+	RUN [ "$(cat /tmp/\*.txt)" = 'hi there' ]
+	`, map[string]string{"*.txt": "hi there"})
+
+	if err != nil {
+		// Normally we would do c.Fatal(err) here but given that
+		// the odds of this failing are so rare, it must be because
+		// the OS we're running the client on doesn't support * in
+		// filenames (like windows).  So, instead of failing the test
+		// just let it pass. Then we don't need to explicitly
+		// say which OSs this works on or not.
+		return
+	}
+	defer ctx.Close()
+
+	_, err = buildImageFromContext(name, ctx, true)
+	if err != nil {
+		c.Fatalf("should have built: %q", err)
+	}
+}
+
 func (s *DockerSuite) TestBuildCopyWildcardCache(c *check.C) {
 	name := "testcopywildcardcache"
 	ctx, err := fakeContext(`FROM busybox