diff --git a/cmd/cue/cmd/common.go b/cmd/cue/cmd/common.go
index 31c2f6453..940118252 100644
--- a/cmd/cue/cmd/common.go
+++ b/cmd/cue/cmd/common.go
@@ -173,9 +173,8 @@ func (b *buildPlan) instances() iterator {
 		}
 	default:
 		i = &instanceIterator{
-			inst: b.instance,
-			a:    []*cue.Instance{b.instance},
-			i:    -1,
+			a: []*cue.Instance{b.instance},
+			i: -1,
 		}
 		b.instance = nil
 	}
diff --git a/cmd/cue/cmd/testdata/script/eval_e_hidden.txt b/cmd/cue/cmd/testdata/script/eval_e_hidden.txt
index 0148499f4..3f0a3d80b 100644
--- a/cmd/cue/cmd/testdata/script/eval_e_hidden.txt
+++ b/cmd/cue/cmd/testdata/script/eval_e_hidden.txt
@@ -7,6 +7,10 @@ stdout '34'
 
 cue eval -e _a tst.cue
 stdout '34'
+
+cue eval -H
+stdout '_a: 34'
+
 -- dep.cue --
 package dep
 
diff --git a/cmd/cue/cmd/testdata/script/hidden.txt b/cmd/cue/cmd/testdata/script/hidden.txt
new file mode 100644
index 000000000..32ecf7a8d
--- /dev/null
+++ b/cmd/cue/cmd/testdata/script/hidden.txt
@@ -0,0 +1,46 @@
+cue eval pkg.cue -H
+cmp stdout expect-stdout
+
+cue eval -H
+cmp stdout expect-stdout
+
+cue eval file.cue -H
+cmp stdout expect-stdout
+
+-- pkg.cue --
+package pkg
+
+_top: 1
+
+a: _h0: int
+
+#foo: {
+    _h1: string
+}
+
+{
+    _h2: string
+}
+
+-- file.cue --
+_top: 1
+
+a: _h0: int
+
+#foo: {
+    _h1: string
+}
+
+{
+    _h2: string
+}
+
+-- expect-stdout --
+_top: 1
+a: {
+    _h0: int
+}
+_h2: string
+#foo: {
+    _h1: string
+}
diff --git a/cue/types.go b/cue/types.go
index 636fe5222..3502e4aed 100644
--- a/cue/types.go
+++ b/cue/types.go
@@ -1815,7 +1815,7 @@ func (v Value) Unify(w Value) Value {
 	if v.v == nil {
 		return w
 	}
-	if w.v == nil {
+	if w.v == nil || w.v == v.v {
 		return v
 	}
 
diff --git a/internal/core/adt/feature.go b/internal/core/adt/feature.go
index 2df36569e..a09931408 100644
--- a/internal/core/adt/feature.go
+++ b/internal/core/adt/feature.go
@@ -107,7 +107,7 @@ func (f Feature) PkgID(index StringIndexer) string {
 	}
 	s := index.IndexToString(f.safeIndex())
 	if p := strings.IndexByte(s, '\x00'); p >= 0 {
-		return s[p+1:]
+		s = s[p+1:]
 	}
 	return s
 }