ANSI escapes shown as question marks when output from Java

[phantamanta44]

• I am on the latest Hyper.app version

• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: Windows 10 on MSYS2

• Hyper.app version: 2.0.0

• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/phantamanta44/d8e41084f326b2620e88d77086119267

• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere): N/A

• The issue is reproducible in vanilla Hyper.app: Probably; occurs when two installed plugins are disabled.

Issue

ANSI escapes in output from Java are printed as question marks:

The Java version in particular is HotSpot 64-bit 1.8.0_161-b12.

ANSI escapes seem to work in general, as shown by running a simple echo:

And oddly enough, they seem to work in the Java program when xargs'd through echo or piped through a no-op sed:

This is my bashrc if relevant: https://github.com/sapegin/dotfiles/blob/dd063f9c30de7d2234e8accdb5272a5cc0a3388b/includes/bash_prompt.bash

[Stanzilla]

Hey there, could you test this in the Visual Studio Code terminal, please? If it has the same issue, then it is xtermjs/xterm.js#1395

[jerch]

@phantamanta44 :
Does System.out.printf("\u001b[mHi there!") work for you? Imho thats not a bug in xterm.js either but related to the way winpty gets the underlying console content: since you do two distinct System.out... calls, the first gets printed to the console before the second has landed, thus winpty sees only a single ESC char at a certain time.

[phantamanta44]

Printing in one statement:

Also seems to occur in VSCode:

Then I'll just assume it's xtermjs/xterm.js#1395