Blob slice codegen fail log

gistfile1.pytb

   Compiling script v0.0.1 (file:///home/shinglyu/workspace/servo)
Failed to run custom build command for `script v0.0.1 (file:///home/shinglyu/workspace/servo)`
Process didn't exit successfully: `make -f makefile.cargo` (status=2)
--- stdout
/usr/bin/python2.7 /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/pythonpath.py \
	  -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/parser -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/ply \
	  -D/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen \
	  /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/GlobalGen.py /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/Bindings.conf . \
	  --cachedir=/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/_cache \
	   /home/shinglyu/workspace/servo/components/script/dom/webidls/Attr.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Blob.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/CanvasRenderingContext2D.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/CharacterData.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ChildNode.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Comment.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Console.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/CustomEvent.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DedicatedWorkerGlobalScope.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DocumentFragment.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DocumentType.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Document.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMException.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMImplementation.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMParser.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMRectList.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMRect.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/DOMTokenList.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Element.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/EventHandler.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/EventListener.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/EventTarget.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Event.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/File.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/FormData.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLAnchorElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLAppletElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLAreaElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLAudioElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLBaseElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLBodyElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLBRElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLButtonElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLCanvasElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLCollection.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLDataElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLDataListElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLDirectoryElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLDivElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLDListElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLEmbedElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLFieldSetElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLFontElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLFormElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLFrameElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLFrameSetElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLHeadElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLHeadingElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLHRElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLHtmlElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLIFrameElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLImageElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLInputElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLLabelElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLLegendElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLLIElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLLinkElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLMapElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLMediaElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLMetaElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLMeterElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLModElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLObjectElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLOListElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLOptGroupElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLOptionElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLOutputElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLParagraphElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLParamElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLPreElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLProgressElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLQuoteElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLScriptElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLSelectElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLSourceElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLSpanElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLStyleElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableCaptionElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableCellElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableColElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableDataCellElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableHeaderCellElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableRowElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTableSectionElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTemplateElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTextAreaElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTimeElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTitleElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLTrackElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLUListElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLUnknownElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/HTMLVideoElement.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Location.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/MessageEvent.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/MouseEvent.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/NamedNodeMap.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Navigator.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/NodeFilter.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/NodeIterator.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/NodeList.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Node.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ParentNode.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/PerformanceTiming.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Performance.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ProcessingInstruction.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ProgressEvent.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Range.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Screen.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ServoHTMLParser.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/TestBinding.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Text.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/TreeWalker.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/UIEvent.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/URLSearchParams.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/URLUtilsReadOnly.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/URLUtils.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/ValidityState.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Window.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/WorkerGlobalScope.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/WorkerLocation.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/WorkerNavigator.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/Worker.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/XMLHttpRequestEventTarget.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/XMLHttpRequestUpload.webidl  /home/shinglyu/workspace/servo/components/script/dom/webidls/XMLHttpRequest.webidl 
Generating PrototypeList.rs
Generating RegisterBindings.rs
Generating InterfaceTypes.rs
Generating InheritTypes.rs
Generating Bindings/mod.rs
Generating UnionTypes.rs
/usr/bin/python2.7 /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/pythonpath.py \
	  -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/parser -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/ply \
	  -D/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen \
	  /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/BindingGen.py \
	  /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/Bindings.conf Bindings/AttrBinding /home/shinglyu/workspace/servo/components/script/dom/webidls/Attr.webidl
Generating binding implementation: Bindings/AttrBinding.rs
touch /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/Bindings/AttrBinding.rs
/usr/bin/python2.7 /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/pythonpath.py \
	  -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/parser -I/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/ply \
	  -D/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen \
	  /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/BindingGen.py \
	  /home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/Bindings.conf Bindings/BlobBinding /home/shinglyu/workspace/servo/components/script/dom/webidls/Blob.webidl

--- stderr
Traceback (most recent call last):
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/pythonpath.py", line 60, in <module>
    main(sys.argv[1:])
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/pythonpath.py", line 52, in main
    execfile(script, frozenglobals)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/BindingGen.py", line 52, in <module>
    main()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/BindingGen.py", line 49, in main
    generate_binding_rs(config, outputPrefix, webIDLFile);
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/BindingGen.py", line 22, in generate_binding_rs
    if replaceFileIfChanged(filename, root.define()):
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 4575, in define
    return stripTrailingWhitespace(self.root.define())
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1343, in define
    defn = self.child.define()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1343, in define
    defn = self.child.define()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1343, in define
    defn = self.child.define()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1598, in define
    return self.join(child.define() for child in self.children if child is not None)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1595, in join
    return self.joiner.join(filter(lambda s: len(s) > 0, (child for child in generator)))
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1595, in <genexpr>
    return self.joiner.join(filter(lambda s: len(s) > 0, (child for child in generator)))
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1598, in <genexpr>
    return self.join(child.define() for child in self.children if child is not None)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 4204, in define
    return self.cgRoot.define()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1343, in define
    defn = self.child.define()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1598, in define
    return self.join(child.define() for child in self.children if child is not None)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1595, in join
    return self.joiner.join(filter(lambda s: len(s) > 0, (child for child in generator)))
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1595, in <genexpr>
    return self.joiner.join(filter(lambda s: len(s) > 0, (child for child in generator)))
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1598, in <genexpr>
    return self.join(child.define() for child in self.children if child is not None)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 1780, in define
    body = self.definition_body()
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 2496, in definition_body
    self.descriptor, self.method),
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 194, in __init__
    self.cgRoot = CGList([getPerSignatureCall(signature)])
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 185, in getPerSignatureCall
    method, argConversionStartsAt)
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 2278, in __init__
    i in range(argConversionStartsAt, self.argCount)])
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 955, in __init__
    allowTreatNonObjectAsNull=argument.allowTreatNonCallableAsNull())
  File "/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/CodegenRust.py", line 833, in getJSToNativeConversionTemplate
    assert not isEnforceRange and not isClamp
AssertionError
make: *** [/home/shinglyu/workspace/servo/components/script/dom/bindings/codegen/Bindings/BlobBinding.rs] Error 1