U+1BFF BATAK SYMBOL BINDU PANGOLAT overlaps marks and 'dist' should ignore U+1BE6 BATAK SIGN TOMPI

[dscorbett]

Font

NotoSansBatak-Regular.otf

Where the font came from, and when

Site: https://github.com/notofonts/batak/releases/tag/NotoSansBatak-v2.003
Date: 2023-10-06

Font version

Version 2.003

Issue

U+1BFF BATAK SYMBOL BINDU PANGOLAT can overlap the marks U+1BE8 and U+1BED in the preceding cluster. The 'dist' lookup fixes some overlaps but not all of them, and it is stymied by U+1BE6 BATAK SIGN TOMPI, which should be ignored in 'dist'. The examples given below are not exhaustive: this is a general problem.

Character data

ᯑᯭ᯿ᯂ᯦ᯨ᯿
U+1BD1 BATAK LETTER DA
U+1BED BATAK VOWEL SIGN KARO O
U+1BFF BATAK SYMBOL BINDU PANGOLAT
U+1BC2 BATAK LETTER HA
U+1BE6 BATAK SIGN TOMPI
U+1BE8 BATAK VOWEL SIGN PAKPAK E
U+1BFF BATAK SYMBOL BINDU PANGOLAT

Screenshot