Subscripts with longer vertical strokes are implemented incompletely

[dscorbett]

Font

NotoSansGurmukhi-Regular.otf

Where the font came from, and when

Site: https://github.com/notofonts/gurmukhi/releases/tag/NotoSansGurmukhi-v2.004
Date: 2023-04-02

Font version

Version 2.004

Issue

Subscript ra, va, and ha have alternative forms with longer vertical strokes to join to certain bases like ca, but these alternative glyphs are not always active when they should be. A nukta blocks these alternative forms. When a subscript is ligated with virama, -u, and -ū, the ligature does not have an alternative form.

Character data

ਚ੍ਰ੍ਛ੍ਵੁਞ੍ਹੂ
U+0A1A GURMUKHI LETTER CA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A30 GURMUKHI LETTER RA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A1B GURMUKHI LETTER CHA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A35 GURMUKHI LETTER VA
U+0A41 GURMUKHI VOWEL SIGN U
U+0A1E GURMUKHI LETTER NYA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A39 GURMUKHI LETTER HA
U+0A42 GURMUKHI VOWEL SIGN UU
ਚ਼੍ਰਛ਼੍ਵਞ਼੍ਹ
U+0A1A GURMUKHI LETTER CA
U+0A3C GURMUKHI SIGN NUKTA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A30 GURMUKHI LETTER RA
U+0A1B GURMUKHI LETTER CHA
U+0A3C GURMUKHI SIGN NUKTA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A35 GURMUKHI LETTER VA
U+0A1E GURMUKHI LETTER NYA
U+0A3C GURMUKHI SIGN NUKTA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A39 GURMUKHI LETTER HA
ਚ੍ਰਛ੍ਵਞ੍ਹ
U+0A1A GURMUKHI LETTER CA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A30 GURMUKHI LETTER RA
U+0A1B GURMUKHI LETTER CHA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A35 GURMUKHI LETTER VA
U+0A1E GURMUKHI LETTER NYA
U+0A4D GURMUKHI SIGN VIRAMA
U+0A39 GURMUKHI LETTER HA

Screenshot

[bgo-eiu]

None of these sequences are permissible in Punjabi/Gurmukhi spelling. The three consonants used are not supposed to form any conjuncts at all, with any letter. The subscript "v" in sequences such as ਸ੍ਵਾਦ is supposed to be instead of ਸੁਆਦ following older conventions. This is supposed to represent a semi vowel with equivalent pronunciation as in svad ~ suad. ਸ੍ਵੁ would be effectively writing the same thing twice on top of eachother and cannot be considered a valid sequence.

These are the only letters which allow attaching ਵ: ਸ, ਦ, ਤ
These are the only letters which allow atraching ਰ: ਸ, ਸ਼, ਕ, ਗ, ਟ, ਡ, ਤ, ਦ, ਪ, ਫ, ਫ਼, ਬ, ਭ
These are the only letters which allow attaching ਹ: ਸ, ਹ, ਗ, ਜ, ਜ਼, ਣ, ਨ, ਬ, ਮ, ਯ, ਰ, ਲ, ਲ਼, ਵ, ੜ

All that said, here is one word that is technically real albeit obscure which uses a nuqta, conjunct, and bottom vowel ਬਲ਼੍ਹੂ ("it would rot")