zig/std/special/panic.zig

// This file is the default panic handler if the root source file does not
// have a `pub fn panic`.
// If this file wants to import other files *by name*, support for that would
// have to be added in the compiler.

const builtin = @import("builtin");

pub coldcc fn panic(msg: []const u8) -> noreturn {
    if (builtin.os == builtin.Os.freestanding) {
        while (true) {}
    } else {
        @import("std").debug.panic("{}", msg);
    }
}