dart:html - CanvasElement throws Uncaught TypeError: Object #123456 has no method '_ptr$htmld071c1$ $getter_'

[DartBot]

This issue was originally filed by [email protected]

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• Using dart:html -
  CanvasElement board = document.query("#canvas");
  CanvasRenderingContext2D context = board.getContext('2d');
  context.setFillStyle('#­123456');
  This gives me the following error when running the generated JS in
  Chrome:
  Uncaught TypeError: Object #­123456 has no method 'ptr$htmld071c1$
  $getter'
  However if use dart:dom and do
  HTMLCanvasElement board = document.getElementById("canvas");
  CanvasRenderingContext2D context = board.getContext('2d');
  context.setFillStyle('#­123456');
  The code runs fine.

[DartBot]

This comment was originally written by [email protected]

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Added Area-UI, Triaged labels.

[dgrove]

This is an issue involving JS generated by dartc - dartc no longer generates JS.

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Added AssumedStale label.