Several warnings when using incremental-dom-closure.js with Closure Compiler

[morisil]

I built the incremental-dom using js-closure target and it works well. But when I compile my application with the Closure Compiler I get the following output:

js/lib/incemental-dom/incremental-dom-closure.js:70: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor
           ^

js/lib/incemental-dom/incremental-dom-closure.js:111: WARNING - Bad type annotation. Unknown type NameOrCtorDef
   * @const {NameOrCtorDef}
             ^

js/lib/incemental-dom/incremental-dom-closure.js:130: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The nodeName or constructor for the Node.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:213: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The tag or constructor for the Element.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:345: WARNING - Bad type annotation. Unknown type NameOrCtorDef
  * @param {NameOrCtorDef} currentNameOrCtor
            ^

js/lib/incemental-dom/incremental-dom-closure.js:346: WARNING - Bad type annotation. Unknown type NameOrCtorDef
  * @param {NameOrCtorDef} nameOrCtor
            ^

js/lib/incemental-dom/incremental-dom-closure.js:592: WARNING - assignment to property patch of module$exports$incrementaldom
found   : function ((DocumentFragment|Element), function (?): ?, ?=): (Node|null)
required: function ((DocumentFragment|Element), function (T): ?, T=): Node
var patchInner = patchFactory(function (node, fn, data) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:618: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
  var startNode = /** @type {!Element} */{ nextSibling: node };
                                         ^^^^^^^^^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:628: WARNING - assignment
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)
  currentNode = startNode;
  ^^^^^^^^^^^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:632: WARNING - actual parameter 1 of module$contents$incrementaldom_assertPatchElementNoExtras does not match formal parameter
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)
    assertPatchElementNoExtras(startNode, currentNode, expectedNextNode, expectedPrevNode);
                               ^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:632: WARNING - actual parameter 2 of module$contents$incrementaldom_assertPatchElementNoExtras does not match formal parameter
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)
    assertPatchElementNoExtras(startNode, currentNode, expectedNextNode, expectedPrevNode);
                                          ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:639: WARNING - inconsistent return type
found   : (null|{nextSibling: (DocumentFragment|Element)})
required: (Node|null)
  return startNode === currentNode ? null : currentNode;
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:647: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The name or constructor to check for.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:665: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The name or constructor for the Node.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:781: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The tag or constructor for the Element.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:793: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
  return (/** @type {!Element} */currentParent
                                 ^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:793: WARNING - inconsistent return type
found   : (Node|null)
required: Element
  return (/** @type {!Element} */currentParent
                                 ^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:809: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
  return (/** @type {!Element} */currentNode
                                 ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:809: WARNING - inconsistent return type
found   : (Node|null)
required: Element
  return (/** @type {!Element} */currentNode
                                 ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:822: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
  return (/** @type {!Text} */currentNode
                              ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:822: WARNING - inconsistent return type
found   : (Node|null)
required: Text
  return (/** @type {!Text} */currentNode
                              ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:835: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
  return (/** @type {!Element} */currentParent
                                 ^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:835: WARNING - inconsistent return type
found   : (Node|null)
required: Element
  return (/** @type {!Element} */currentParent
                                 ^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:963: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
    var obj = /** @type {!Object<string,string>} */style;
                                                   ^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:966: WARNING - actual parameter 1 of module$contents$incrementaldom_has does not match formal parameter
found   : *
required: Object<string,*>
      if (has(obj, prop)) {
              ^^^

js/lib/incemental-dom/incremental-dom-closure.js:987: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
    applyAttr(el, name, /** @type {?(boolean|number|string)} */value);
                                                               ^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:987: WARNING - actual parameter 3 of module$exports$incrementaldom.applyAttr does not match formal parameter
found   : *
required: (boolean|null|number|string|undefined)
    applyAttr(el, name, /** @type {?(boolean|number|string)} */value);
                                                               ^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:1036: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The Element's tag or constructor.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:1059: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
        var name = /** @type {string} */statics[_i];
                                        ^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:1061: WARNING - actual parameter 2 of module$contents$incrementaldom_updateAttribute does not match formal parameter
found   : *
required: string
        updateAttribute(node, name, value);
                              ^^^^

js/lib/incemental-dom/incremental-dom-closure.js:1144: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The Element's tag or constructor.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:1197: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The Element's tag or constructor.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:1217: WARNING - Bad type annotation. Unknown type NameOrCtorDef
 * @param {NameOrCtorDef} nameOrCtor The Element's tag or constructor.
           ^

js/lib/incemental-dom/incremental-dom-closure.js:1252: WARNING - assignment to property text of NodeData
found   : (boolean|number|string)
required: (null|string)
    data.text = /** @type {string} */value;
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

js/lib/incemental-dom/incremental-dom-closure.js:1252: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?
    data.text = /** @type {string} */value;
                                     ^^^^^

0 error(s), 35 warning(s), 97.3% typed

I cannot tell how severe problems these warnings indicate. But maybe it will be helpful to have them collected in this ticket.

[morisil]

I upgraded to closure compiler v20170626 and now the output seems to be a bit more informative

Originally at:
js/lib/incemental-dom/src/node_data.js:21: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:111: 
Originally at:
js/lib/incemental-dom/src/node_data.js:60: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:130: 
Originally at:
js/lib/incemental-dom/src/node_data.js:76: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:213: 
Originally at:
js/lib/incemental-dom/src/nodes.js:30: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:345: 
Originally at:
js/lib/incemental-dom/src/assertions.js:120: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:346: 
Originally at:
js/lib/incemental-dom/src/assertions.js:120: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:592: 
Originally at:
js/lib/incemental-dom/src/core.js:125: WARNING - assignment to property patch of module$exports$incrementaldom
found   : function ((DocumentFragment|Element), function (?): ?, ?=): (Node|null)
required: function ((DocumentFragment|Element), function (T): ?, T=): Node

js/lib/incemental-dom/incremental-dom-closure.js:618: 
Originally at:
js/lib/incemental-dom/src/core.js:152: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:628: 
Originally at:
js/lib/incemental-dom/src/core.js:159: WARNING - assignment
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)

js/lib/incemental-dom/incremental-dom-closure.js:632: 
Originally at:
js/lib/incemental-dom/src/core.js:166: WARNING - actual parameter 1 of module$contents$incrementaldom_assertPatchElementNoExtras does not match formal parameter
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)

js/lib/incemental-dom/incremental-dom-closure.js:632: 
Originally at:
js/lib/incemental-dom/src/core.js:166: WARNING - actual parameter 2 of module$contents$incrementaldom_assertPatchElementNoExtras does not match formal parameter
found   : {nextSibling: (DocumentFragment|Element)}
required: (Node|null)

js/lib/incemental-dom/incremental-dom-closure.js:639: 
Originally at:
js/lib/incemental-dom/src/core.js:174: WARNING - inconsistent return type
found   : (null|{nextSibling: (DocumentFragment|Element)})
required: (Node|null)

js/lib/incemental-dom/incremental-dom-closure.js:647: 
Originally at:
js/lib/incemental-dom/src/core.js:151: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:665: 
Originally at:
js/lib/incemental-dom/src/core.js:189: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:781: 
Originally at:
js/lib/incemental-dom/src/core.js:314: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:793: 
Originally at:
js/lib/incemental-dom/src/core.js:338: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:793: 
Originally at:
js/lib/incemental-dom/src/core.js:338: WARNING - inconsistent return type
found   : (Node|null)
required: Element

js/lib/incemental-dom/incremental-dom-closure.js:809: 
Originally at:
js/lib/incemental-dom/src/core.js:354: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:809: 
Originally at:
js/lib/incemental-dom/src/core.js:354: WARNING - inconsistent return type
found   : (Node|null)
required: Element

js/lib/incemental-dom/incremental-dom-closure.js:822: 
Originally at:
js/lib/incemental-dom/src/core.js:367: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:822: 
Originally at:
js/lib/incemental-dom/src/core.js:367: WARNING - inconsistent return type
found   : (Node|null)
required: Text

js/lib/incemental-dom/incremental-dom-closure.js:835: 
Originally at:
js/lib/incemental-dom/src/core.js:380: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:835: 
Originally at:
js/lib/incemental-dom/src/core.js:380: WARNING - inconsistent return type
found   : (Node|null)
required: Element

js/lib/incemental-dom/incremental-dom-closure.js:963: 
Originally at:
js/lib/incemental-dom/src/attributes.js:101: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:966: 
Originally at:
js/lib/incemental-dom/src/attributes.js:104: WARNING - actual parameter 1 of module$contents$incrementaldom_has does not match formal parameter
found   : *
required: Object<string,*>

js/lib/incemental-dom/incremental-dom-closure.js:987: 
Originally at:
js/lib/incemental-dom/src/attributes.js:126: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:987: 
Originally at:
js/lib/incemental-dom/src/attributes.js:126: WARNING - actual parameter 3 of module$exports$incrementaldom.applyAttr does not match formal parameter
found   : *
required: (boolean|null|number|string|undefined)

js/lib/incemental-dom/incremental-dom-closure.js:1036: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:60: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:1059: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:87: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?

js/lib/incemental-dom/incremental-dom-closure.js:1061: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:89: WARNING - actual parameter 2 of module$contents$incrementaldom_updateAttribute does not match formal parameter
found   : *
required: string

js/lib/incemental-dom/incremental-dom-closure.js:1144: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:75: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:1197: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:214: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:1217: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:232: WARNING - Bad type annotation. Unknown type NameOrCtorDef

js/lib/incemental-dom/incremental-dom-closure.js:1252: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:285: WARNING - assignment to property text of NodeData
found   : (boolean|number|string)
required: (null|string)

js/lib/incemental-dom/incremental-dom-closure.js:1252: 
Originally at:
js/lib/incemental-dom/src/virtual_elements.js:286: WARNING - Misplaced type annotation. Type annotations are not allowed here. Are you missing parentheses?