hb-shape broken for multi-line input in versions 1.7.5 and 1.7.6 (1.7.4 works) #888
Description
I see this same problem in OS X builds of hb-shape, but I'm using the pre-built Windows EXEs from the GitHub releases to illustrate the issue below.
The NotoSansDevanagari-Regular.ttf file I used is from here:
https://noto-website-2.storage.googleapis.com/pkgs/NotoSansDevanagari-unhinted.zip
The hi.txt file I used is from here:
https://github.com/googlei18n/harfbuzz-testing-wikipedia/blob/master/bz2/hi.txt.bz2
When I use the 1.7.4 version of hb-shape, I get the output I expect:
C:\Users\cchapman\Downloads>harfbuzz-1.7.4-win32\hb-shape.exe --font-file=NotoSansDevanagari-Regular.ttf --text-file=hi.txt | head
[kadeva=0+762|evowelsigndeva=0@-221,0+0]
[madeva=0+598|evowelsignanusvaradeva=0+0]
[kadeva=0+762|iivowelsign3deva=0+259]
[hadeva=0+531|aivowelsigndeva=0+0]
[kadeva=0+762|aavowelsigndeva=0+259]
[audeva=0+1023|radeva=1+409]
[sadeva=0+676|evowelsigndeva=0+0]
[kadeva=0+762|ovowelsigndeva=0+259]
[hadeva=0+531|aivowelsigndeva=0+0|dandadeva=2+379]
[edeva=0+553|kadeva=1+762]
However, when I use 1.7.5 or 1.7.6, I get unexpected output after the first line:
C:\Users\cchapman\Downloads>harfbuzz-1.7.5-win32\hb-shape.exe --font-file=NotoSansDevanagari-Regular.ttf --text-file=hi.txt | head
[kadeva=0+762|evowelsigndeva=0@-221,0+0]
[vadeva=0+556|aavowelsigndeva=0+259|radeva=2+409|aavowelsigndeva=2+259]
[.notdef=0+600|.notdef=1+600|nadeva=2+555|uvowelsigndeva=2+0|sadeva=4+676|aavowelsigndeva=4+259|radeva=6+409]
[.notdef=0+600|ivowelsigndeva=0+259|uni25CC=0+510|dadhadeva=2+791]
[uni25CC=0+510|evowelsigndeva=0+0|ivowelsign01deva=1+259|radeva=1+409|kadeva=3+762|aavowelsigndeva=3+259]
[.notdef=0+600|.notdef=1+600|madeva=2+598|evowelsignanusvaradeva=2+0]
[.notdef=0+600|.notdef=1+600]
[taprehalfdeva=0+306|yadeva=2+580]
[.notdef=0+600|.notdef=1+600|uni25CC=1+510|viramadeva=1+0|radeva=3+409|aavowelsigndeva=3+259|madeva=5+598|aavowelsigndeva=5+259|ivowelsign06deva=7+259|nnadeva=7+723|kadeva=9+762]
[.notdef=0+600|ivowelsigndeva=0+259|uni25CC=0+510|edeva=2+553]
C:\Users\cchapman\Downloads>harfbuzz-1.7.6-win32\hb-shape.exe --font-file=NotoSansDevanagari-Regular.ttf --text-file=hi.txt | head
[kadeva=0+762|evowelsigndeva=0@-221,0+0]
[vadeva=0+556|aavowelsigndeva=0+259|radeva=2+409|aavowelsigndeva=2+259]
[.notdef=0+600|.notdef=1+600|nadeva=2+555|uvowelsigndeva=2+0|sadeva=4+676|aavowelsigndeva=4+259|radeva=6+409]
[.notdef=0+600|ivowelsigndeva=0+259|uni25CC=0+510|dadhadeva=2+791]
[uni25CC=0+510|evowelsigndeva=0+0|ivowelsign01deva=1+259|radeva=1+409|kadeva=3+762|aavowelsigndeva=3+259]
[.notdef=0+600|.notdef=1+600|madeva=2+598|evowelsignanusvaradeva=2+0]
[.notdef=0+600|.notdef=1+600]
[taprehalfdeva=0+306|yadeva=2+580]
[.notdef=0+600|.notdef=1+600|uni25CC=1+510|viramadeva=1+0|radeva=3+409|aavowelsigndeva=3+259|madeva=5+598|aavowelsigndeva=5+259|ivowelsign06deva=7+259|nnadeva=7+723|kadeva=9+762]
[.notdef=0+600|ivowelsigndeva=0+259|uni25CC=0+510|edeva=2+553]