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Painting issue with COMMON_LVB_UNDERSCORE in 1703 onwards #47
Description
COMMON_LVB_UNDERSCORE seems to paint unreliably since Windows 10 1703 (10.0.15063) and it's still present in 10.0.17063.1000 on the fast insider ring.
Compile and run the following program multiple times from a new command prompt (I've only tried it on x64 installations):
#include <windows.h>
#include <stdio.h>
int main(void) {
HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(hConsole, &info);
SetConsoleTextAttribute(hConsole, COMMON_LVB_UNDERSCORE | info.wAttributes);
printf("COMMON_LVB_UNDERSCORE added to console text attributes\n");
fflush(stdout);
printf("Hello world\n");
fflush(stdout);
SetConsoleTextAttribute(hConsole, info.wAttributes);
}The expected output is two lines of text both underlined. On my 1703 box, the first line is never underlined and, randomly, neither was the second on one run. Scroll the console to move the lines off-screen and scroll it back and the lines reappear.
Note that you have to scroll the console text itself out of the viewport and back in - moving another window over the top of the console and then off does not cause the underlining to reappear. The effect occurs regardless of whether the program is run from the machine directly or via remote desktop.
Activity
zadjii-msft commentedon Jan 11, 2018
I'm gonna link ConEmu/ConEmu#1302 to this, because they definitely look related. In all likelyhood I probably messed something up with meta attributes when I added RGB color.
I'm looking into it.
bitcrazed commentedon May 3, 2018
Thanks for posting with repro David Allsopp (@dra27) - can confirm this is still an issue post-RS4:
Also, if I drag the right hand edge, shrinking the Console, I get "underlines galore"!
Over to you Mike Griese (@zadjii-msft) ;)
Internal Bug# 17363227
win: Emulate reverse, secure, and standout
win: Emulate reverse, secure, and standout
DHowett-MSFT commentedon Oct 25, 2018
This is fixed in the "October 2018 Update".
scrouthtv commentedon Mar 13, 2021
Dustin L. Howett (MSFT) (@DHowett-MSFT)
COMMON_LVB_UNDERSCOREis not working for me. Should I open a new issue?I am running 1.7.572.0
zadjii-msft commentedon Mar 15, 2021
scrouthtv Probably - this bug is just about 3 years old (and entirely predates the Terminal's entire codebase), so if you're seeing something like this, it's probably a different root cause.
DHowett commentedon Mar 15, 2021
I believe we decoupled
COMMON_LVB_UNDERSCOREfrom SGR 4 underline, and now Terminal therefore ignoresCOMMON_LVB_UNDERSCORE.scrouthtv commentedon Mar 15, 2021
I just found there's already an opened issue about this: #8037