initial : <span><a href="../../IR/Tenv/index.html#type-t">IR.Tenv.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="../../IR/Procname/index.html#type-t">IR.Procname.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="../../IR/ProcAttributes/index.html#type-t">IR.ProcAttributes.t</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-t">t</a></span></code></div></div><div class="odoc-spec"><div class="spec module" id="module-Stack" class="anchored"><a href="#module-Stack" 