bug: Windows stack overflow on startup (1MB default too small for Clap command graph)

[pszymkowiak]

Problem

On Windows, the default main-thread stack is 1MB. RTK's large Commands enum (70+ commands via Clap) can exceed this during startup, causing a stack overflow crash on rtk.exe --version or rtk.exe --help.

macOS/Linux default to 8MB stack so this doesn't affect them.

Fix

Add to build.rs:

#[cfg(windows)]
{
    println!("cargo:rustc-link-arg=/STACK:8388608"); // 8MB
}

Origin

Identified by @timeshift92 in PR #771 (Copilot PR, closed as duplicate — but this fix is valuable).

References

• PR Add Copilot support and fix Windows startup #771 (original fix embedded in larger PR)
• Clap issue: large command graphs + derive macros generate deep call stacks

[timeshift92]

i added new pr where i'm fixed only this case #865