Do I need to balance?

Hi All,

I'm using ASM and a ClassWriter like this: 

    new ClassWriter(ClassWriter.COMPUTE_MAXS);

I'm wondering do I need to balance the stack or will the JVM / ASM handle this for me?

I have the following code, which leave one extra value on the stack, hence my question:
(I removed signatures to reduce the size of this output)

visitCode()
visitVarInsn(ALOAD, 1)
visitLdcInsn(Transcript)
visitMethodInsn(INVOKESTATIC, 'st/redline/ProtoObject', 'primitiveVariableAt', '<snip>')
visitVarInsn(ALOAD, 1)
visitLdcInsn(Hello World.)
visitMethodInsn(INVOKESTATIC, 'st/redline/ProtoObject', 'primitiveString', '<snip>')
visitLdcInsn(show:)
visitInsn(ACONST_NULL)
visitMethodInsn(INVOKESTATIC, 'st/redline/ProtoObject', 'primitiveSend', '<snip>')
visitInsn(DUP)
visitLdcInsn(cr)
visitInsn(ACONST_NULL)
visitMethodInsn(INVOKESTATIC, 'st/redline/ProtoObject', 'primitiveSend', '<snip>')
visitInsn(POP)
visitInsn(DUP)
visitLdcInsn(cr)
visitInsn(ACONST_NULL)
visitMethodInsn(INVOKESTATIC, 'st/redline/ProtoObject', 'primitiveSend', '<snip>')
visitInsn(ARETURN)
visitMaxs(1, 1)
visitEnd()

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