Created attachment 321162 [details]
viewing ranger in vte

Scrolling over lines in ncurses interfaces with specific Japanese characters/character combinations results in text and colors getting shifted. Some text in the same line as troublesome Japanese characters gets shifted left while the color of the shifted text gets inverted with the background color. Version of vte is 0.42.4.

Steps to reproduce:
- Open an ncurses program like ranger or ncmpcpp
- Find files with Japanese characters
- Scroll over them

Actual results:
Text gets shifted and colors get inverted


Expected results:
Normal rendering of text, background, and colors like other non-Japanese text


Does this happen every time?
It occurs with specific Japanese characters and/or specific character
combinations. It can be repeated with following Japanese text reliably:

'BLUNTSIDE - 若いジー - 01 イントロ.flac'   
'BLUNTSIDE - 若いジー - 02 幸せの施設.flac' 
'BLUNTSIDE - 若いジー - 03 ビーチ.flac'  
'BLUNTSIDE - 若いジー - 04 魂.flac'	
'BLUNTSIDE - 若いジー - 05 若いジー (REDUX).flac'  
'BLUNTSIDE - 若いジー - 06 ドライブ.flac'
'BLUNTSIDE - 若いジー - cover.png'

The problem might not show up with other Japanese text.