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Code Issues 19.0k Packages Projects Releases 20 Wiki Activity

Some Unicode characters cause a mismatch between the cursor position and the displayed width #15877

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opened 2026-01-31 04:51:09 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 04:51:09 +00:00
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Originally created by @magiblot on GitHub (Nov 13, 2021).

Windows Terminal version (or Windows build number)

10.0.19043.1348

Other Software

No response

Steps to reproduce

First, make sure you are not using the legacy console.

Then compile and run the following program in a console:

#include <windows.h>
#include <string.h>

inline void print(const char *s)
{
    WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE), s, strlen(s), 0, 0);
}

int main()
{
    UINT icp = GetConsoleCP();
    UINT ocp = GetConsoleOutputCP();
    SetConsoleCP(65001);
    SetConsoleOutputCP(65001);

    print("123456789\n");
    print("<𐌀>");
    print("<𐌁>");
    print("|\n");
    print("<𐌀𐌁>");
    print("|\n");

    SetConsoleOutputCP(ocp);
    SetConsoleCP(icp);
    return 0;
}

Expected Behavior

The program should output either of the following:

  1. If 𐌀 and 𐌁 are considered to be single-width: 
    123456789
<𐌀><𐌁>|
<𐌀𐌁>|
  2. If 𐌀 and 𐌁 are considered to be double-width: 
    123456789
<𐌀 ><𐌁 >|
<𐌀 𐌁 >|

Actual Behavior

The program had the following output:

123456789
<𐌀> <𐌁> |
<𐌀𐌁>  |

As you can see, after every WriteConsole operation the cursor is moved as if the affected characters were double-width, but they don't look like so.

This issue affects at least the following Unicode characters (from this page):

Old Italic
    𐌀 𐌁 𐌂 𐌃 𐌄 𐌅 𐌆 𐌇 𐌈 𐌉 𐌊 𐌋 𐌌 𐌍 𐌎 𐌏 𐌐 𐌑 𐌒 𐌓 𐌔 𐌕 𐌖 𐌗 𐌘 𐌙 𐌚 𐌛 𐌜 𐌝 𐌞 𐌠 𐌡 𐌢 𐌣 
Gothic
    𐌰 𐌱 𐌲 𐌳 𐌴 𐌵 𐌶 𐌷 𐌸 𐌹 𐌺 𐌻 𐌼 𐌽 𐌾 𐌿 𐍀 𐍁 𐍂 𐍃 𐍄 𐍅 𐍆 𐍇 𐍈 𐍉 𐍊 
Deseret
    𐐀 𐐁 𐐂 𐐃 𐐄 𐐅 𐐆 𐐇 𐐈 𐐉 𐐊 𐐋 𐐌 𐐍 𐐎 𐐏 𐐐 𐐑 𐐒 𐐓 𐐔 𐐕 𐐖 𐐗 𐐘 𐐙 𐐚 𐐛 𐐜 𐐝 𐐞 𐐟 𐐠 𐐡 𐐢 𐐣 𐐤 𐐥 𐐨 𐐩 𐐪 𐐫 𐐬 𐐭 𐐮 𐐯 𐐰 𐐱 𐐲 𐐳 𐐴 𐐵 𐐶 𐐷 𐐸 𐐹 𐐺 𐐻 𐐼 𐐽 𐐾 𐐿 𐑀 𐑁 𐑂 𐑃 𐑄 𐑅 𐑆 𐑇 𐑈 𐑉 𐑊 𐑋 𐑌 𐑍 
Byzantine Musical Symbols
    𝀀 𝀁 𝀂 𝀃 𝀄 𝀅 𝀆 𝀇 𝀈 𝀉 𝀊 𝀋 𝀌 𝀍 𝀎 𝀏 𝀐 𝀑 𝀒 𝀓 𝀔 𝀕 𝀖 𝀗 𝀘 𝀙 𝀚 𝀛 𝀜 𝀝 𝀞 𝀟 𝀠 𝀡 𝀢 𝀣 𝀤 𝀥 𝀦 𝀧 𝀨 𝀩 𝀪 𝀫 𝀬 𝀭 𝀮 𝀯 𝀰 𝀱 𝀲 𝀳 𝀴 𝀵 𝀶 𝀷 𝀸 𝀹 𝀺 𝀻 𝀼 𝀽 𝀾 𝀿 𝁀 𝁁 𝁂 𝁃 𝁄 𝁅 𝁆 𝁇 𝁈 𝁉 𝁊 𝁋 𝁌 𝁍 𝁎 𝁏 𝁐 𝁑 𝁒 𝁓 𝁔 𝁕 𝁖 𝁗 𝁘 𝁙 𝁚 𝁛 𝁜 𝁝 𝁞 𝁟 𝁠 𝁡 𝁢 𝁣 𝁤 𝁥 𝁦 𝁧 𝁨 𝁩 𝁪 𝁫 𝁬 𝁭 𝁮 𝁯 𝁰 𝁱 𝁲 𝁳 𝁴 𝁵 𝁶 𝁷 𝁸 𝁹 𝁺 𝁻 𝁼 𝁽 𝁾 𝁿 ... 
Musical Symbols
    𝄀 𝄁 𝄂 𝄃 𝄄 𝄅 𝄆 𝄇 𝄈 𝄉 𝄊 𝄋 𝄌 𝄍 𝄎 𝄏 𝄐 𝄑 𝄒 𝄓 𝄔 𝄕 𝄖 𝄗 𝄘 𝄙 𝄚 𝄛 𝄜 𝄝 𝄞 𝄟 𝄠 𝄡 𝄢 𝄣 𝄤 𝄥 𝄦 𝄪 𝄫 𝄬 𝄭 𝄮 𝄯 𝄰 𝄱 𝄲 𝄳 𝄴 𝄵 𝄶 𝄷 𝄸 𝄹 𝄺 𝄻 𝄼 𝄽 𝄾 𝄿 𝅀 𝅁 𝅂 𝅃 𝅄 𝅅 𝅆 𝅇 𝅈 𝅉 ���� 𝅋 𝅌 𝅍 𝅎 𝅏 𝅐 𝅑 𝅒 𝅓 𝅔 𝅕 𝅖 𝅗 𝅘 𝅙 𝅚 𝅛 𝅜 𝅝 𝅗𝅥 𝅘𝅥 𝅘𝅥𝅮 𝅘𝅥𝅯 𝅘𝅥𝅰 𝅘𝅥𝅱 𝅘𝅥𝅲 𝅥 𝅦 𝅧 𝅨 𝅩 𝅪 𝅫 𝅬 𝅭 𝅮 𝅯 𝅰 𝅱 𝅲 𝅳 𝅴 𝅵 𝅶 𝅷 𝅸 𝅹 𝅺 𝅻 𝅼 𝅽 𝅾 𝅿 𝆀 𝆁 𝆂 ... 
Mathematical Alphanumeric Symbols
    𝐀 𝐁 𝐂 𝐃 𝐄 𝐅 𝐆 𝐇 𝐈 𝐉 𝐊 𝐋 𝐌 𝐍 𝐎 𝐏 𝐐 𝐑 𝐒 𝐓 𝐔 𝐕 𝐖 𝐗 𝐘 𝐙 𝐚 𝐛 𝐜 𝐝 𝐞 𝐟 𝐠 𝐡 𝐢 𝐣 𝐤 𝐥 𝐦 𝐧 𝐨 𝐩 𝐪 𝐫 𝐬 𝐭 𝐮 𝐯 𝐰 𝐱 𝐲 𝐳 𝐴 𝐵 𝐶 𝐷 𝐸 𝐹 𝐺 𝐻 𝐼 𝐽 𝐾 𝐿 𝑀 𝑁 𝑂 𝑃 𝑄 𝑅 𝑆 𝑇 𝑈 𝑉 𝑊 𝑋 𝑌 𝑍 𝑎 𝑏 𝑐 𝑑 𝑒 𝑓 𝑔 𝑖 𝑗 𝑘 𝑙 𝑚 𝑛 𝑜 𝑝 𝑞 𝑟 𝑠 𝑡 𝑢 𝑣 𝑤 𝑥 𝑦 𝑧 𝑨 𝑩 𝑪 𝑫 𝑬 𝑭 𝑮 𝑯 𝑰 𝑱 𝑲 𝑳 𝑴 𝑵 𝑶 𝑷 𝑸 𝑹 𝑺 𝑻 𝑼 𝑽 𝑾 𝑿 𝒀 ... 
Tags
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Originally created by @magiblot on GitHub (Nov 13, 2021). ### Windows Terminal version (or Windows build number) 10.0.19043.1348 ### Other Software _No response_ ### Steps to reproduce First, make sure you are *not* using the legacy console. Then compile and run the following program in a console: ```c++ #include <windows.h> #include <string.h> inline void print(const char *s) { WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE), s, strlen(s), 0, 0); } int main() { UINT icp = GetConsoleCP(); UINT ocp = GetConsoleOutputCP(); SetConsoleCP(65001); SetConsoleOutputCP(65001); print("123456789\n"); print("<𐌀>"); print("<𐌁>"); print("|\n"); print("<𐌀𐌁>"); print("|\n"); SetConsoleOutputCP(ocp); SetConsoleCP(icp); return 0; } ``` ### Expected Behavior The program should output either of the following: 1. If `𐌀` and `𐌁` are considered to be single-width: ``` 123456789 <𐌀><𐌁>| <𐌀𐌁>| ``` 2. If `𐌀` and `𐌁` are considered to be double-width: ``` 123456789 <𐌀 ><𐌁 >| <𐌀 𐌁 >| ``` ### Actual Behavior The program had the following output: ``` 123456789 <𐌀> <𐌁> | <𐌀𐌁> | ``` As you can see, after every `WriteConsole` operation the cursor is moved as if the affected characters were double-width, but they don't look like so. This issue affects at least the following Unicode characters (from [this page](https://www.cogsci.ed.ac.uk/~richard/unicode-sample-3-2.html)): ``` Old Italic 𐌀 𐌁 𐌂 𐌃 𐌄 𐌅 𐌆 𐌇 𐌈 𐌉 𐌊 𐌋 𐌌 𐌍 𐌎 𐌏 𐌐 𐌑 𐌒 𐌓 𐌔 𐌕 𐌖 𐌗 𐌘 𐌙 𐌚 𐌛 𐌜 𐌝 𐌞 𐌠 𐌡 𐌢 𐌣 Gothic 𐌰 𐌱 𐌲 𐌳 𐌴 𐌵 𐌶 𐌷 𐌸 𐌹 𐌺 𐌻 𐌼 𐌽 𐌾 𐌿 𐍀 𐍁 𐍂 𐍃 𐍄 𐍅 𐍆 𐍇 𐍈 𐍉 𐍊 Deseret 𐐀 𐐁 𐐂 𐐃 𐐄 𐐅 𐐆 𐐇 𐐈 𐐉 𐐊 𐐋 𐐌 𐐍 𐐎 𐐏 𐐐 𐐑 𐐒 𐐓 𐐔 𐐕 𐐖 𐐗 𐐘 𐐙 𐐚 𐐛 𐐜 𐐝 𐐞 𐐟 𐐠 𐐡 𐐢 𐐣 𐐤 𐐥 𐐨 𐐩 𐐪 𐐫 𐐬 𐐭 𐐮 𐐯 𐐰 𐐱 𐐲 𐐳 𐐴 𐐵 𐐶 𐐷 𐐸 𐐹 𐐺 𐐻 𐐼 𐐽 𐐾 𐐿 𐑀 𐑁 𐑂 𐑃 𐑄 𐑅 𐑆 𐑇 𐑈 𐑉 𐑊 𐑋 𐑌 𐑍 Byzantine Musical Symbols 𝀀 𝀁 𝀂 𝀃 𝀄 𝀅 𝀆 𝀇 𝀈 𝀉 𝀊 𝀋 𝀌 𝀍 𝀎 𝀏 𝀐 𝀑 𝀒 𝀓 𝀔 𝀕 𝀖 𝀗 𝀘 𝀙 𝀚 𝀛 𝀜 𝀝 𝀞 𝀟 𝀠 𝀡 𝀢 𝀣 𝀤 𝀥 𝀦 𝀧 𝀨 𝀩 𝀪 𝀫 𝀬 𝀭 𝀮 𝀯 𝀰 𝀱 𝀲 𝀳 𝀴 𝀵 𝀶 𝀷 𝀸 𝀹 𝀺 𝀻 𝀼 𝀽 𝀾 𝀿 𝁀 𝁁 𝁂 𝁃 𝁄 𝁅 𝁆 𝁇 𝁈 𝁉 𝁊 𝁋 𝁌 𝁍 𝁎 𝁏 𝁐 𝁑 𝁒 𝁓 𝁔 𝁕 𝁖 𝁗 𝁘 𝁙 𝁚 𝁛 𝁜 𝁝 𝁞 𝁟 𝁠 𝁡 𝁢 𝁣 𝁤 𝁥 𝁦 𝁧 𝁨 𝁩 𝁪 𝁫 𝁬 𝁭 𝁮 𝁯 𝁰 𝁱 𝁲 𝁳 𝁴 𝁵 𝁶 𝁷 𝁸 𝁹 𝁺 𝁻 𝁼 𝁽 𝁾 𝁿 ... Musical Symbols 𝄀 𝄁 𝄂 𝄃 𝄄 𝄅 𝄆 𝄇 𝄈 𝄉 𝄊 𝄋 𝄌 𝄍 𝄎 𝄏 𝄐 𝄑 𝄒 𝄓 𝄔 𝄕 𝄖 𝄗 𝄘 𝄙 𝄚 𝄛 𝄜 𝄝 𝄞 𝄟 𝄠 𝄡 𝄢 𝄣 𝄤 𝄥 𝄦 𝄪 𝄫 𝄬 𝄭 𝄮 𝄯 𝄰 𝄱 𝄲 𝄳 𝄴 𝄵 𝄶 𝄷 𝄸 𝄹 𝄺 𝄻 𝄼 𝄽 𝄾 𝄿 𝅀 𝅁 𝅂 𝅃 𝅄 𝅅 𝅆 𝅇 𝅈 𝅉 ���� 𝅋 𝅌 𝅍 𝅎 𝅏 𝅐 𝅑 𝅒 𝅓 𝅔 𝅕 𝅖 𝅗 𝅘 𝅙 𝅚 𝅛 𝅜 𝅝 𝅗𝅥 𝅘𝅥 𝅘𝅥𝅮 𝅘𝅥𝅯 𝅘𝅥𝅰 𝅘𝅥𝅱 𝅘𝅥𝅲 𝅥 𝅦 𝅧 𝅨 𝅩 𝅪 𝅫 𝅬 𝅭 𝅮 𝅯 𝅰 𝅱 𝅲 𝅳 𝅴 𝅵 𝅶 𝅷 𝅸 𝅹 𝅺 𝅻 𝅼 𝅽 𝅾 𝅿 𝆀 𝆁 𝆂 ... Mathematical Alphanumeric Symbols 𝐀 𝐁 𝐂 𝐃 𝐄 𝐅 𝐆 𝐇 𝐈 𝐉 𝐊 𝐋 𝐌 𝐍 𝐎 𝐏 𝐐 𝐑 𝐒 𝐓 𝐔 𝐕 𝐖 𝐗 𝐘 𝐙 𝐚 𝐛 𝐜 𝐝 𝐞 𝐟 𝐠 𝐡 𝐢 𝐣 𝐤 𝐥 𝐦 𝐧 𝐨 𝐩 𝐪 𝐫 𝐬 𝐭 𝐮 𝐯 𝐰 𝐱 𝐲 𝐳 𝐴 𝐵 𝐶 𝐷 𝐸 𝐹 𝐺 𝐻 𝐼 𝐽 𝐾 𝐿 𝑀 𝑁 𝑂 𝑃 𝑄 𝑅 𝑆 𝑇 𝑈 𝑉 𝑊 𝑋 𝑌 𝑍 𝑎 𝑏 𝑐 𝑑 𝑒 𝑓 𝑔 𝑖 𝑗 𝑘 𝑙 𝑚 𝑛 𝑜 𝑝 𝑞 𝑟 𝑠 𝑡 𝑢 𝑣 𝑤 𝑥 𝑦 𝑧 𝑨 𝑩 𝑪 𝑫 𝑬 𝑭 𝑮 𝑯 𝑰 𝑱 𝑲 𝑳 𝑴 𝑵 𝑶 𝑷 𝑸 𝑹 𝑺 𝑻 𝑼 𝑽 𝑾 𝑿 𝒀 ... Tags 󠀁 󠀠 󠀡 󠀢 󠀣 󠀤 󠀥 󠀦 󠀧 󠀨 󠀩 󠀪 󠀫 󠀬 󠀭 󠀮 󠀯 󠀰 󠀱 󠀲 󠀳 󠀴 󠀵 󠀶 󠀷 󠀸 󠀹 󠀺 󠀻 󠀼 󠀽 󠀾 󠀿 󠁀 󠁁 󠁂 󠁃 󠁄 󠁅 󠁆 󠁇 󠁈 󠁉 󠁊 󠁋 󠁌 󠁍 󠁎 󠁏 󠁐 󠁑 󠁒 󠁓 󠁔 󠁕 󠁖 󠁗 󠁘 󠁙 󠁚 󠁛 󠁜 󠁝 󠁞 󠁟 󠁠 󠁡 󠁢 󠁣 󠁤 󠁥 󠁦 󠁧 󠁨 󠁩 󠁪 󠁫 󠁬 󠁭 󠁮 󠁯 󠁰 󠁱 󠁲 󠁳 󠁴 󠁵 󠁶 󠁷 󠁸 󠁹 󠁺 󠁻 󠁼 󠁽 󠁾 󠁿 ```
claunia added the Resolution-Duplicate label 2026-01-31 04:51:09 +00:00
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Reference: starred/terminal#15877
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?