container/initproc: check path equivalence by value

Fixes regression introduced while integrating Absolute.

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/initproc.go

@@ -35,7 +35,8 @@ func (p *MountProcOp) apply(state *setupState) error {
 
 func (p *MountProcOp) Is(op Op) bool {
 	vp, ok := op.(*MountProcOp)
-	return ok && ((p == nil && vp == nil) || p == vp)
+	return ok && ((p == nil && vp == nil) ||
+		(p.Target != nil && vp.Target != nil && p.Target.Is(vp.Target)))
 }
 func (*MountProcOp) prefix() string   { return "mounting" }
 func (p *MountProcOp) String() string { return fmt.Sprintf("proc on %q", p.Target) }

container/initproc_test.go

@@ -0,0 +1,32 @@
+package container
+
+import "testing"
+
+func TestMountProcOp(t *testing.T) {
+	checkOpsBuilder(t, []opsBuilderTestCase{
+		{"proc", new(Ops).Proc(MustAbs("/proc/")), Ops{
+			&MountProcOp{Target: MustAbs("/proc/")},
+		}},
+	})
+
+	checkOpIs(t, []opIsTestCase{
+		{"zero", new(MountProcOp), new(MountProcOp), false},
+
+		{"target differs", &MountProcOp{
+			Target: MustAbs("/proc/nonexistent"),
+		}, &MountProcOp{
+			Target: MustAbs("/proc/"),
+		}, false},
+
+		{"equals", &MountProcOp{
+			Target: MustAbs("/proc/"),
+		}, &MountProcOp{
+			Target: MustAbs("/proc/"),
+		}, true},
+	})
+
+	checkOpMeta(t, []opMetaTestCase{
+		{"proc", &MountProcOp{Target: MustAbs("/proc/")},
+			"mounting", `proc on "/proc/"`},
+	})
+}