Fix font data clone error when pdfBug is enabled.

[brendandahl]

The widths property should be an object to match what metrics returns.

In ZapfDingbats.pdf I was getting a data clone error with pdfBug enabled.
In buildCharCodeToWidth() there was an encoding with the name "at" which
is also the name of a method on an array. buildCharCodeToWidth assumes an
object is passed in, so when it checked for the "at" property, it found the
method and copied it over.

This only seemed to affect Firefox.

[Snuffleupagus]

so when it checked for the "at" property, it found the
method and copied it over.

This only seemed to affect Firefox.

That's probably because at isn't generally available in browsers yet, with the exception of Firefox Nightly, given that it's a very recent addition to the ECMAScript specification. There's also currently some web compatibility questions regarding the name itself; see tc39/proposal-relative-indexing-method#41

[Snuffleupagus]

/botio test

[pdfjsbot]

From: Bot.io (Linux m4)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.67.70.0:8877/8c250b24e048903/output.txt

[pdfjsbot]

From: Bot.io (Windows)

---

Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://3.101.106.178:8877/96f6c35e9f69324/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Failed

Full output at http://54.67.70.0:8877/8c250b24e048903/output.txt

Total script time: 26.95 mins

• Font tests: Passed
• Unit tests: Passed
• Integration Tests: Passed
• Regression tests: FAILED

Image differences available at: http://54.67.70.0:8877/8c250b24e048903/reftest-analyzer.html#web=eq.log

[pdfjsbot]

From: Bot.io (Windows)

---

Failed

Full output at http://3.101.106.178:8877/96f6c35e9f69324/output.txt

Total script time: 28.30 mins

• Font tests: Passed
• Unit tests: Passed
• Integration Tests: Passed
• Regression tests: FAILED

Image differences available at: http://3.101.106.178:8877/96f6c35e9f69324/reftest-analyzer.html#web=eq.log

[Snuffleupagus]

Looks good to me, thank you!

[timvandermeij]

Thanks!