Zilla Slab display issue in Nightly when viewed on fonts.google.com

[alexgibson]

When I view the Zilla Slab page on Google Fonts in Firefox Nightly (56), the font does not display and there are several JS errors in the console.

[alexgibson]

This seems related to https://bugzilla.mozilla.org/show_bug.cgi?id=1331797

[alexgibson]

@m4rc1e - this issue only seems to effect the current Firefox Nightly (56), but I'm not clear if this is just an issue with the Google Fonts site, or an issue with the font itself. I do see a bunch of angular JS errors in the console. My main concern / question is: would this effect any site that loaded the Zilla Slab font hosted on fonts.google.com?

I don't see any issues with the font in use on https://www.mozilla.org/

[m4rc1e]

My Jsbin works on nightly.

http://jsbin.com/kaguwalene/edit?html,output

I guess this could be fonts.google.com

[alexgibson]

I can confirm the JSBin looks ok for me too

[alexgibson]

I do see a bunch of font validation errors in the console when I load the page on fonts.google.com. I don't see these errors on either the JSBin linked above, or on www.mozilla.org.

Does the Google Fonts site generate a subset for display purposes on the page maybe?

downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:normal weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=MIkI-zFTb-IKu6GQ4qfBISKvUU_cByiiRjMx5wKvR9oJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=ca4b45fc2d8284fd&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:normal weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=MIkI-zFTb-IKu6GQ4qfBISKvUU_cByiiRjMx5wKvR9oJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=ca4b45fc2d8284fd&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:normal weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=MIkI-zFTb-IKu6GQ4qfBISKvUU_cByiiRjMx5wKvR9oJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=ca4b45fc2d8284fd&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:normal weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=MIkI-zFTb-IKu6GQ4qfBISKvUU_cByiiRjMx5wKvR9oJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=ca4b45fc2d8284fd&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:italic weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMr_NOk2J49LgE8wDheDydO77tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=2edace82e38b93fe&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:italic weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMr_NOk2J49LgE8wDheDydO77tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=2edace82e38b93fe&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:italic weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMr_NOk2J49LgE8wDheDydO77tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=2edace82e38b93fe&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:italic weight:300 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMr_NOk2J49LgE8wDheDydO77tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=2edace82e38b93fe&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:italic weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=0uwn9tpUNTyjFGXazfTluMTXOgDC9B_FcH8U4zq4d9pm090H82c3M7QG62zk4J1lZka1TUhbYSKvtufYEjCFpw&skey=9ce6a510b53c4ae1&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:italic weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=0uwn9tpUNTyjFGXazfTluMTXOgDC9B_FcH8U4zq4d9pm090H82c3M7QG62zk4J1lZka1TUhbYSKvtufYEjCFpw&skey=9ce6a510b53c4ae1&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:italic weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=0uwn9tpUNTyjFGXazfTluMTXOgDC9B_FcH8U4zq4d9pm090H82c3M7QG62zk4J1lZka1TUhbYSKvtufYEjCFpw&skey=9ce6a510b53c4ae1&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:italic weight:normal stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=0uwn9tpUNTyjFGXazfTluMTXOgDC9B_FcH8U4zq4d9pm090H82c3M7QG62zk4J1lZka1TUhbYSKvtufYEjCFpw&skey=9ce6a510b53c4ae1&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:normal weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=M-lMpg6F7WVOVam88MR7yMiwI02_dWwr00A-w7_SazoJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa8b38d9fb8245bc&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:normal weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=M-lMpg6F7WVOVam88MR7yMiwI02_dWwr00A-w7_SazoJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa8b38d9fb8245bc&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:normal weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=M-lMpg6F7WVOVam88MR7yMiwI02_dWwr00A-w7_SazoJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa8b38d9fb8245bc&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:normal weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=M-lMpg6F7WVOVam88MR7yMiwI02_dWwr00A-w7_SazoJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa8b38d9fb8245bc&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:italic weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMq4AyFqDea0dVgzXaIF6M2n7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=c3d6da9ec551b3ac&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:italic weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMq4AyFqDea0dVgzXaIF6M2n7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=c3d6da9ec551b3ac&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:italic weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMq4AyFqDea0dVgzXaIF6M2n7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=c3d6da9ec551b3ac&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:italic weight:500 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMq4AyFqDea0dVgzXaIF6M2n7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=c3d6da9ec551b3ac&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:normal weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=idTxEJxWLSyMdm2hH0_fO9RH7GHtVaewoS3j7LxwR9gJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=b142959be4274cbf&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:normal weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=idTxEJxWLSyMdm2hH0_fO9RH7GHtVaewoS3j7LxwR9gJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=b142959be4274cbf&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:normal weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=idTxEJxWLSyMdm2hH0_fO9RH7GHtVaewoS3j7LxwR9gJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=b142959be4274cbf&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:normal weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=idTxEJxWLSyMdm2hH0_fO9RH7GHtVaewoS3j7LxwR9gJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=b142959be4274cbf&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:italic weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMiTQREm9XUjMB8hzkw4VK1X7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=3a4040de6e68062&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:italic weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMiTQREm9XUjMB8hzkw4VK1X7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=3a4040de6e68062&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:italic weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMiTQREm9XUjMB8hzkw4VK1X7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=3a4040de6e68062&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:italic weight:600 stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMiTQREm9XUjMB8hzkw4VK1X7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=3a4040de6e68062&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:normal weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=5alS-fi1sAYG-KJydQxv8PW2HBc5F9KXbnjlXj3sAUYJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa01195928aed3f7&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:normal weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=5alS-fi1sAYG-KJydQxv8PW2HBc5F9KXbnjlXj3sAUYJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa01195928aed3f7&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:normal weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=5alS-fi1sAYG-KJydQxv8PW2HBc5F9KXbnjlXj3sAUYJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa01195928aed3f7&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:normal weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=5alS-fi1sAYG-KJydQxv8PW2HBc5F9KXbnjlXj3sAUYJxswkgg5n4TuVaIY7ONlFgu7pLkZbft-7wfYe0GDvag&skey=fa01195928aed3f7&v=v1 Zilla+Slab:1:12
downloadable font: Layout: DFLT script doesn't satisfy the spec. DefaultLangSys is NULL (font-family: "Zilla Slab script=all rev=1" style:italic weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMsvVXI12avq5WsBRxcsbYxj7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=31b1451cc7b95f1d&v=v1 Zilla+Slab:1:12
downloadable font: Layout: Failed to parse script table 0 (font-family: "Zilla Slab script=all rev=1" style:italic weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMsvVXI12avq5WsBRxcsbYxj7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=31b1451cc7b95f1d&v=v1 Zilla+Slab:1:12
downloadable font: GSUB: Failed to parse script list table (font-family: "Zilla Slab script=all rev=1" style:italic weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMsvVXI12avq5WsBRxcsbYxj7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=31b1451cc7b95f1d&v=v1 Zilla+Slab:1:12
downloadable font: rejected by sanitizer (font-family: "Zilla Slab script=all rev=1" style:italic weight:bold stretch:normal src index:0) source: https://fonts.gstatic.com/l/font?kit=SlbCHfLtf3uBEqmR9ezZMsvVXI12avq5WsBRxcsbYxj7tzEG6ZqJxR47jY1dOVAQzawOIcdrLB7LXQO_5azY-w&skey=31b1451cc7b95f1d&v=v1

[m4rc1e]

@alexgibson the fonts being loaded on fonts.google.com might be subsetted using an older version of fontTools for display purposes. Older versions had DFLT script tag issues. Unfortunately, I'm guessing here.

FF Nightly is probably using ots-sanitise, https://github.com/khaledhosny/ots.

cc @davelab6

[Pomax]

Did we update OTS? Zilla uses a rather creative version of the GSUB table (https://github.com/nodebox/opentype.js/issues/292 ran into this) and It's possible that OTS changed to reject this. Perhaps @khaledhosny has ideas here, too.

[davelab6]

I confirm that the error is not in the upstream TTFs but in the derivatives served by the Google Fonts API. OTS was updated upstream so that this won't trigger, based on a clarification in the OT 1.8.2 spec, so if Firefox nightly builds in the latest OTS, the errors should stop.

[khaledhosny]

The reason such errors show in Nightly but not in Beta and Release is because sanitizing layout tables is enabled only in Nightly. Furthermore, as @davelab6 pointed out, this particular check has been dropped from OTS very recently and I think Nightly now has this version of it so such errors should soon not be present in an up to date nightly as well.

[alexgibson]

and I think Nightly now has this version of it so such errors should soon not be present in an up to date nightly as well.

I still see the same issue in the latest Firefox Nightly 57.0a1 (2017-08-03)

[wisniewskit]

I believe the font has now been fixed to work with nightly builds. Can someone else confirm that the font's page also appears properly for them on Firefox nightly?

[davelab6]

Yep this fix should be there for all families, Roboto fixed as well

On Oct 18, 2017 8:15 PM, "Thomas Wisniewski" notifications@github.com wrote:

I believe the font has now been fixed to work with nightly builds. Can someone else confirm that the font's page also appears properly for them on Firefox nightly?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/mozilla/zilla-slab/issues/12#issuecomment-337763457, or mute the thread https://github.com/notifications/unsubscribe-auth/AAP9y3BTSHYe4eCnL-vWZj5keDOY77XXks5stpSjgaJpZM4OOGos .

[scheinercc]

Confirmed with 58.0a1 (2017-10-18). Thanks everyone!

[alexgibson]

Thanks for getting this fixed everyone, very much appreciated 💯