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Fontbakery Technical Report

If you think a check is flawed or have an idea for a check, please file an issue at https://github.com/fonttools/fontbakery/issues and remember to include a pointer to the repo and branch you're checking.

DEPRECATION WARNING

By late-December 2024, FontBakery version 0.13.0 introduced a new naming scheme for the check-IDs.

Fontbakery detected usage of old IDs and performed an automatic backwards-compatibility translation for you.
This automatic translation will be deprecated in the next major release.

Please start using the new check-IDs as documented at /Lib/fontbakery/legacy_checkids.py

The following legacy check-IDs were detected:
- com.google.fonts/check/outline_semi_vertical
- com.google.fonts/check/outline_colinear_vectors
- com.google.fonts/check/ttx_roundtrip
- com.google.fonts/check/outline_short_segments
- com.google.fonts/check/fontdata_namecheck
- com.google.fonts/check/outline_alignment_miss
- com.google.fonts/check/version_bump
- com.google.fonts/check/outline_jaggy_segments

Summary

💥 ERROR ☠ FATAL 🔥 FAIL ⚠️ WARN ⏩ SKIP ℹ️ INFO ✅ PASS
4 0 5 15 79 13 341
1% 0% 1% 3% 17% 3% 75%

Meaning of check results:

If you get ERRORs, please help us improve the tool by reporting them at our issue tracker.

(but other kinds of bug reports and/or feature requests are also always welcome, of course!)

FontBakery version: 0.13.1

Universal Profile Checks

🔥🔥⚠️⚠️⚠️⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️ℹ️ℹ️

Ensure the font supports case swapping for all its glyphs.

Check ID: <FontBakeryCheck:case_mapping>
🔥 Teachers-Italic[wght].ttf
  • 🔥 FAIL

    The following glyphs lack their case-swapping counterparts:

    Glyph present in the font Missing case-swapping counterpart
    U+039E: GREEK CAPITAL LETTER XI U+03BE: GREEK SMALL LETTER XI
    U+A729: LATIN SMALL LETTER TZ U+A728: LATIN CAPITAL LETTER TZ
    [code: missing-case-counterparts]
🔥 Teachers[wght].ttf
  • 🔥 FAIL

    The following glyphs lack their case-swapping counterparts:

    Glyph present in the font Missing case-swapping counterpart
    U+039E: GREEK CAPITAL LETTER XI U+03BE: GREEK SMALL LETTER XI
    U+A729: LATIN SMALL LETTER TZ U+A728: LATIN CAPITAL LETTER TZ
    [code: missing-case-counterparts]

Ensure variable fonts include an avar table.

Check ID: <FontBakeryCheck:mandatory_avar_table>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    This variable font does not have an avar table. Most variable fonts should include an avar table to correctly define axes progression rates.

    [code: missing-avar]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    This variable font does not have an avar table. Most variable fonts should include an avar table to correctly define axes progression rates.

    [code: missing-avar]

Check math signs have the same width.

Check ID: <FontBakeryCheck:math_signs_width>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    The most common width is 460 among a set of 8 math glyphs. The following math glyphs have a different width, though:

    Width = 516: less, greater

    Width = 480: plusminus

    [code: width-outliers]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    The most common width is 460 among a set of 8 math glyphs. The following math glyphs have a different width, though:

    Width = 516: less, greater

    Width = 480: plusminus

    [code: width-outliers]

Check font contains no unreachable glyphs

Check ID: <FontBakeryCheck:unreachable_glyphs>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    The following glyphs could not be reached by codepoint or substitution rules:

    - NULL

- backslash.001

- braceleft.001

- braceright.001

- bracketleft.001

- bracketright.001

- parenleft.001

- parenright.001

- slash.001
    [code: unreachable-glyphs]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    The following glyphs could not be reached by codepoint or substitution rules:

    - NULL

- backslash.001

- braceleft.001

- braceright.001

- bracketleft.001

- bracketright.001

- parenleft.001

- parenright.001

- slash.001
    [code: unreachable-glyphs]

Metadata Checks

⚠️⚠️⏩⏩⏩⏩ℹ️ℹ️

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:googlefonts/metadata/unreachable_subsetting>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    The following codepoints supported by the font are not covered by any subsets defined in the font's metadata file, and will never be served. You can solve this by either manually adding additional subset declarations to METADATA.pb, or by editing the glyphset definitions.

    • U+02D8 BREVE: try adding one of: yi, canadian-aboriginal
    • U+02D9 DOT ABOVE: try adding one of: yi, canadian-aboriginal
    • U+02DB OGONEK: try adding one of: yi, canadian-aboriginal
    • U+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: math, cherokee, tifinagh, coptic
    • U+0306 COMBINING BREVE: try adding one of: old-permic, tifinagh
    • U+0307 COMBINING DOT ABOVE: try adding one of: old-permic, syriac, coptic, canadian-aboriginal, tai-le, duployan, malayalam, todhri, math, hebrew, tifinagh
    • U+030A COMBINING RING ABOVE: try adding one of: duployan, syriac
    • U+030B COMBINING DOUBLE ACUTE ACCENT: try adding one of: osage, cherokee
    • U+030C COMBINING CARON: try adding one of: cherokee, tai-le
    • U+0312 COMBINING TURNED COMMA ABOVE: try adding math
    • U+0326 COMBINING COMMA BELOW: try adding math
    • U+0327 COMBINING CEDILLA: try adding math
    • U+0328 COMBINING OGONEK: not included in any glyphset definition
    • U+2260 NOT EQUAL TO: try adding math
    • U+2264 LESS-THAN OR EQUAL TO: try adding math
    • U+2265 GREATER-THAN OR EQUAL TO: try adding math
    • U+F8FF : not included in any glyphset definition

    Or you can add the above codepoints to one of the subsets supported by the font: greek-ext, latin, latin-ext, menu

    [code: unreachable-subsetting]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    The following codepoints supported by the font are not covered by any subsets defined in the font's metadata file, and will never be served. You can solve this by either manually adding additional subset declarations to METADATA.pb, or by editing the glyphset definitions.

    • U+02D8 BREVE: try adding one of: yi, canadian-aboriginal
    • U+02D9 DOT ABOVE: try adding one of: yi, canadian-aboriginal
    • U+02DB OGONEK: try adding one of: yi, canadian-aboriginal
    • U+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: math, cherokee, tifinagh, coptic
    • U+0306 COMBINING BREVE: try adding one of: old-permic, tifinagh
    • U+0307 COMBINING DOT ABOVE: try adding one of: old-permic, syriac, coptic, canadian-aboriginal, tai-le, duployan, malayalam, todhri, math, hebrew, tifinagh
    • U+030A COMBINING RING ABOVE: try adding one of: duployan, syriac
    • U+030B COMBINING DOUBLE ACUTE ACCENT: try adding one of: osage, cherokee
    • U+030C COMBINING CARON: try adding one of: cherokee, tai-le
    • U+0312 COMBINING TURNED COMMA ABOVE: try adding math
    • U+0326 COMBINING COMMA BELOW: try adding math
    • U+0327 COMBINING CEDILLA: try adding math
    • U+0328 COMBINING OGONEK: not included in any glyphset definition
    • U+2260 NOT EQUAL TO: try adding math
    • U+2264 LESS-THAN OR EQUAL TO: try adding math
    • U+2265 GREATER-THAN OR EQUAL TO: try adding math
    • U+F8FF : not included in any glyphset definition

    Or you can add the above codepoints to one of the subsets supported by the font: greek-ext, latin, latin-ext, menu

    [code: unreachable-subsetting]

Glyphset Checks

💥💥

Shapes languages in all GF glyphsets.

Check ID: <FontBakeryCheck:googlefonts/glyphsets/shape_languages>
💥 Teachers-Italic[wght].ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
    subresults = list(subresults)
  File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/vendorspecific/googlefonts/glyphsets/shape_languages.py", line 19, in check_glyphsets_shape_languages
    from shaperglot.checker import Checker
    [code: failed-check]
💥 Teachers[wght].ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
    subresults = list(subresults)
  File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/vendorspecific/googlefonts/glyphsets/shape_languages.py", line 19, in check_glyphsets_shape_languages
    from shaperglot.checker import Checker
    [code: failed-check]

Description Checks

🔥🔥🔥⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩

DESCRIPTION.en_us.html should end in a linebreak.

Check ID: <FontBakeryCheck:googlefonts/description/eof_linebreak>
⚠️ METADATA.pb
  • ⚠️ WARN

    The last characther on DESCRIPTION.en_us.html is not a line-break. Please add it.

    [code: missing-eof-linebreak]

Check for presence of an ARTICLE.en_us.html file

Check ID: <FontBakeryCheck:googlefonts/description/has_article>
🔥 Teachers-Italic[wght].ttf
  • 🔥 FAIL

    This font has both a DESCRIPTION.en_us.html file and an ARTICLE.en_us.html file. In this case the description must be deleted.

    [code: description-and-article]
🔥 Teachers[wght].ttf
  • 🔥 FAIL

    This font has both a DESCRIPTION.en_us.html file and an ARTICLE.en_us.html file. In this case the description must be deleted.

    [code: description-and-article]

DESCRIPTION.en_us.html must have more than 200 bytes.

Check ID: <FontBakeryCheck:googlefonts/description/min_length>
🔥 METADATA.pb
  • 🔥 FAIL

    DESCRIPTION.en_us.html must have size larger than 200 bytes.

    [code: too-short]

Shaping Checks

💥💥⚠️⚠️⏩⏩⏩⏩⏩⏩

Ensure dotted circle glyph is present and can attach marks.

Check ID: <FontBakeryCheck:dotted_circle>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    No dotted circle glyph present

    [code: missing-dotted-circle]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    No dotted circle glyph present

    [code: missing-dotted-circle]

Ensure soft_dotted characters lose their dot when combined with marks that replace the dot.

Check ID: <FontBakeryCheck:soft_dotted>
💥 Teachers-Italic[wght].ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
    subresults = list(subresults)
  File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/soft_dotted.py", line 144, in check_soft_dotted
    from shaperglot.checker import Checker
    [code: failed-check]
💥 Teachers[wght].ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
    subresults = list(subresults)
  File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/soft_dotted.py", line 144, in check_soft_dotted
    from shaperglot.checker import Checker
    [code: failed-check]

Font File Checks

⚠️⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️ℹ️ℹ️ℹ️

Ensure fonts have ScriptLangTags declared on the 'meta' table.

Check ID: <FontBakeryCheck:googlefonts/meta/script_lang_tags>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    This font file does not have a 'meta' table.

    [code: lacks-meta-table]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    This font file does not have a 'meta' table.

    [code: lacks-meta-table]

Checking OS/2 achVendID.

Check ID: <FontBakeryCheck:googlefonts/vendor_id>
⚠️ Teachers-Italic[wght].ttf
  • ⚠️ WARN

    OS/2 VendorID value 'NONE' is not yet recognized. If you registered it recently, then it's safe to ignore this warning message. Otherwise, you should set it to your own unique 4 character code, and register it with Microsoft at https://www.microsoft.com/typography/links/vendorlist.aspx

    [code: unknown]
⚠️ Teachers[wght].ttf
  • ⚠️ WARN

    OS/2 VendorID value 'NONE' is not yet recognized. If you registered it recently, then it's safe to ignore this warning message. Otherwise, you should set it to your own unique 4 character code, and register it with Microsoft at https://www.microsoft.com/typography/links/vendorlist.aspx

    [code: unknown]