ArrowAssoc / AnyVal question

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My understanding of value-classes led me to believe that usages of the "->"
from ArrowAssoc
<https://github.com/scala/scala/blob/v2.12.1/src/library/scala/Predef.scala#L308>
would be compiled out and run as if Tuple2's had been instantiated directly.

However, when I feed this file to scalac (2.12.1):

// Test.scala
object Test {
  val tuple = "aaa" -> "bbb"
}

I see instances of ArrowAssoc in the resulting bytecode.

Here's a gist
<https://gist.github.com/ryan-williams/20b96b78c3414e7292302a9e6f799e8a>
with the .scala and .class files as well as the ASMified .class file.

What am I missing?

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<div dir=3D"ltr">My understanding of value-classes led me to believe that u=
sages of <a href=3D"https://github.com/scala/scala/blob/v2.12.1/src/library=
/scala/Predef.scala#L308">the &quot;-&gt;&quot; from ArrowAssoc</a> would b=
e compiled out and run as if Tuple2&#39;s had been instantiated directly.<d=
iv><br></div><div>However, when I feed this file to scalac (2.12.1):</div><=
div><br></div><div><font face=3D"monospace">// Test.scala</font></div><div>=
<div><font face=3D"monospace">object Test {</font></div><div><font face=3D"=
monospace">=C2=A0 val tuple =3D &quot;aaa&quot; -&gt; &quot;bbb&quot;</font=
></div><div><font face=3D"monospace">}</font></div></div><div><br></div><di=
v>I see instances of ArrowAssoc in the resulting bytecode.</div><div><br></=
div><div><a href=3D"https://gist.github.com/ryan-williams/20b96b78c3414e729=
2302a9e6f799e8a">Here&#39;s a gist</a> with the .scala and .class files as =
well as the ASMified .class file.</div><div><br></div><div>What am I missin=
g?</div></div>

<p></p>

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