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Doesn't print all lines of output #9890

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opened 2026-01-31 02:06:47 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 02:06:47 +00:00
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Originally created by @ghost on GitHub (Jul 28, 2020).

Environment

Windows build number: Microsoft Windows NT 10.0.19041.0
Windows Terminal version (if applicable): 1.1.2021.0

Any other software?
PowerShell 7.0.3

Steps to reproduce

  1. Compile this simple C program
    MSVC: cl main.c -o main.exe
    Zig: zig cc main.c -o main.exe

  2. Run it and hit CTRL-C

#include <stdio.h>

int main() {
    int c;
    int blanks, tabs, nl;
    
    blanks = tabs = nl = 0;
    while ((c = getchar()) != EOF) {
        if (c == ' ') {
            ++blanks;
        } else if (c == '\t') {
            ++tabs;
        } else if (c == '\n') {
            ++nl;
        }
    }
    
    printf("Blanks: %d\n", blanks);
    printf("Tabs: %d\n", tabs);
    printf("Newlines: %d\n", nl);
}

Expected behavior

PowerShell 7

Each time it runs, it should print out the above lines. It works on Command Prompt and PowerShell 7 standalone.

Actual behavior

Terminal

It only prints one/two of the lines. I've so far been able to print all three once. It fails in the Terminal with PowerShell 7.

Originally created by @ghost on GitHub (Jul 28, 2020). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: Microsoft Windows NT 10.0.19041.0 Windows Terminal version (if applicable): 1.1.2021.0 Any other software? PowerShell 7.0.3 ``` # Steps to reproduce 1. Compile this simple C program MSVC: `cl main.c -o main.exe` Zig: `zig cc main.c -o main.exe` 2. Run it and hit CTRL-C ```c #include <stdio.h> int main() { int c; int blanks, tabs, nl; blanks = tabs = nl = 0; while ((c = getchar()) != EOF) { if (c == ' ') { ++blanks; } else if (c == '\t') { ++tabs; } else if (c == '\n') { ++nl; } } printf("Blanks: %d\n", blanks); printf("Tabs: %d\n", tabs); printf("Newlines: %d\n", nl); } ``` # Expected behavior <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> ![PowerShell 7](https://i.imgur.com/1mh37kq.png) Each time it runs, it should print out the above lines. It works on Command Prompt and PowerShell 7 standalone. # Actual behavior <!-- What's actually happening? --> ![Terminal](https://i.imgur.com/1dmKXzZ.png) It only prints one/two of the lines. I've so far been able to print all three once. It fails in the Terminal with PowerShell 7.
claunia added the Needs-TriageNeeds-Tag-Fix labels 2026-01-31 02:06:47 +00:00
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Reference: starred/terminal#9890
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