From 33cd8ea86b0e45b01809f9063b2de68dd093a168 Mon Sep 17 00:00:00 2001
From: Nathan Perry <nathan@tailscale.com>
Date: Wed, 8 Apr 2026 13:16:45 -0400
Subject: [PATCH] tool/goexe: refactor to use windows_sys

Updates #19255

Signed-off-by: Nathan Perry <nathan@tailscale.com>
Change-Id: Idf69f23b5a61417d5fa3638a276d64856a6a6964
---
 tool/go.exe                   | Bin 18944 -> 19456 bytes
 tool/goexe/.cargo/config.toml |   3 +
 tool/goexe/Cargo.lock         |  18 +++
 tool/goexe/Cargo.toml         |  13 ++
 tool/goexe/src/main.rs        | 294 ++++++----------------------------
 5 files changed, 79 insertions(+), 249 deletions(-)

diff --git a/tool/go.exe b/tool/go.exe
index 39e90fb9a1d5ccd3422bc58ed671dec77b7279e5..f295d6ac8b4361771ac0d0532e713183c8cc32d2 100755
GIT binary patch
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diff --git a/tool/goexe/.cargo/config.toml b/tool/goexe/.cargo/config.toml
index 89c173a9a..68874b765 100644
--- a/tool/goexe/.cargo/config.toml
+++ b/tool/goexe/.cargo/config.toml
@@ -1,2 +1,5 @@
+[build]
+target = "i686-pc-windows-gnu"
+
 [target.i686-pc-windows-gnu]
 rustflags = ["-C", "link-args=-nostartfiles -lkernel32"]
diff --git a/tool/goexe/Cargo.lock b/tool/goexe/Cargo.lock
index de27c2876..670b23d41 100644
--- a/tool/goexe/Cargo.lock
+++ b/tool/goexe/Cargo.lock
@@ -5,3 +5,21 @@ version = 4
 [[package]]
 name = "go"
 version = "0.1.0"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
diff --git a/tool/goexe/Cargo.toml b/tool/goexe/Cargo.toml
index 77beede96..f20ea6e9d 100644
--- a/tool/goexe/Cargo.toml
+++ b/tool/goexe/Cargo.toml
@@ -3,6 +3,19 @@ name = "go"
 version = "0.1.0"
 edition = "2024"
 
+[dependencies]
+windows-sys = { version = "0.61", features = [
+    "Win32", 
+    "Win32_System_LibraryLoader", 
+    "Win32_System_Environment",
+    "Win32_Storage_FileSystem",
+    "Win32_System_Threading",
+    "Win32_Security",
+    "Win32_System_SystemInformation",
+    "Win32_System_IO",
+    "Win32_System_Console",
+] }
+
 [profile.release]
 opt-level = "z"
 lto = true
diff --git a/tool/goexe/src/main.rs b/tool/goexe/src/main.rs
index da8a6a8bb..27c7e2056 100644
--- a/tool/goexe/src/main.rs
+++ b/tool/goexe/src/main.rs
@@ -25,203 +25,21 @@
 // blocks inside each unsafe fn would be pure noise.
 #![allow(unsafe_op_in_unsafe_fn)]
 
-use core::ptr;
-
-// Win32 constants.
-
-/// https://learn.microsoft.com/en-us/windows/win32/secauthz/generic-access-rights
-const GENERIC_READ: u32 = 0x80000000;
-const GENERIC_WRITE: u32 = 0x40000000;
-/// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilew (dwCreationDisposition)
-const OPEN_EXISTING: u32 = 3;
-const CREATE_ALWAYS: u32 = 2;
-/// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilew (dwShareMode)
-const FILE_SHARE_READ: u32 = 1;
-/// Returned by CreateFileW on failure.
-const INVALID_HANDLE_VALUE: isize = -1;
-/// Returned by GetFileAttributesW when the file does not exist.
-/// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfileattributesw
-const INVALID_FILE_ATTRIBUTES: u32 = 0xFFFFFFFF;
-/// https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
-const INFINITE: u32 = 0xFFFFFFFF;
-
-/// https://learn.microsoft.com/en-us/windows/console/getstdhandle
-const STD_INPUT_HANDLE: u32 = (-10i32) as u32;
-const STD_OUTPUT_HANDLE: u32 = (-11i32) as u32;
-const STD_ERROR_HANDLE: u32 = (-12i32) as u32;
-
-/// Indicates that the hStdInput/hStdOutput/hStdError fields in STARTUPINFOW
-/// contain valid handles.
-/// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/ns-processthreadsapi-startupinfow
-const STARTF_USESTDHANDLES: u32 = 0x00000100;
-
-/// https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/ns-sysinfoapi-system_info
-const PROCESSOR_ARCHITECTURE_INTEL: u16 = 0;
-const PROCESSOR_ARCHITECTURE_AMD64: u16 = 9;
-const PROCESSOR_ARCHITECTURE_ARM64: u16 = 12;
+use core::ptr::{null, null_mut};
+use windows_sys::w;
+use windows_sys::Win32::Foundation::{CloseHandle, GENERIC_READ, GENERIC_WRITE, INVALID_HANDLE_VALUE};
+use windows_sys::Win32::Storage::FileSystem::{CreateDirectoryW, CreateFileW, DeleteFileW, GetFileAttributesW, ReadFile, WriteFile, CREATE_ALWAYS, FILE_SHARE_READ, INVALID_FILE_ATTRIBUTES, OPEN_EXISTING};
+use windows_sys::Win32::System::Console::{GetStdHandle, STD_ERROR_HANDLE, STD_INPUT_HANDLE, STD_OUTPUT_HANDLE};
+use windows_sys::Win32::System::Environment::{GetCommandLineW, GetEnvironmentVariableW, SetEnvironmentVariableW};
+use windows_sys::Win32::System::LibraryLoader::GetModuleFileNameW;
+use windows_sys::Win32::System::SystemInformation::{GetNativeSystemInfo, PROCESSOR_ARCHITECTURE_AMD64, PROCESSOR_ARCHITECTURE_ARM64, PROCESSOR_ARCHITECTURE_INTEL};
+use windows_sys::Win32::System::Threading::{ExitProcess, STARTF_USESTDHANDLES, CreateProcessW, STARTUPINFOW, PROCESS_INFORMATION, WaitForSingleObject, INFINITE, GetExitCodeProcess};
 
 /// Exit code used when this wrapper panics, to distinguish from child
 /// process failures.
+#[cfg(not(test))]
 const EXIT_CODE_PANIC: u32 = 0xFE;
 
-// Win32 struct definitions.
-
-/// STARTUPINFOW — passed to CreateProcessW to configure the child process.
-/// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/ns-processthreadsapi-startupinfow
-#[repr(C)]
-struct StartupInfoW {
-    cb: u32,            // Size of this struct in bytes.
-    reserved: usize,    // lpReserved (must be NULL).
-    desktop: usize,     // lpDesktop
-    title: usize,       // lpTitle
-    x: u32,             // dwX
-    y: u32,             // dwY
-    x_size: u32,        // dwXSize
-    y_size: u32,        // dwYSize
-    x_count_chars: u32, // dwXCountChars
-    y_count_chars: u32, // dwYCountChars
-    fill_attribute: u32,// dwFillAttribute
-    flags: u32,         // dwFlags (e.g. STARTF_USESTDHANDLES)
-    show_window: u16,   // wShowWindow
-    cb_reserved2: u16,  // cbReserved2
-    reserved2: usize,   // lpReserved2
-    std_input: isize,   // hStdInput (HANDLE)
-    std_output: isize,  // hStdOutput (HANDLE)
-    std_error: isize,   // hStdError (HANDLE)
-}
-
-/// PROCESS_INFORMATION — filled by CreateProcessW with handles to the new process/thread.
-/// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/ns-processthreadsapi-process_information
-#[repr(C)]
-struct ProcessInformation {
-    process: isize,    // hProcess (HANDLE)
-    thread: isize,     // hThread (HANDLE)
-    process_id: u32,   // dwProcessId
-    thread_id: u32,    // dwThreadId
-}
-
-/// SYSTEM_INFO — returned by GetNativeSystemInfo.
-/// https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/ns-sysinfoapi-system_info
-#[repr(C)]
-struct SystemInfo {
-    processor_architecture: u16, // wProcessorArchitecture
-    _reserved: u16,
-    _page_size: u32,
-    _min_app_addr: usize,
-    _max_app_addr: usize,
-    _active_processor_mask: usize,
-    _number_of_processors: u32,
-    _processor_type: u32,
-    _allocation_granularity: u32,
-    _processor_level: u16,
-    _processor_revision: u16,
-}
-
-// Win32 API declarations (all from kernel32.dll unless noted).
-
-unsafe extern "system" {
-    /// Returns the fully qualified path of the running executable.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamew
-    fn GetModuleFileNameW(module: isize, filename: *mut u16, size: u32) -> u32;
-
-    /// Opens or creates a file, returning a HANDLE.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilew
-    fn CreateFileW(
-        name: *const u16,
-        access: u32,
-        share: u32,
-        security: usize,
-        disposition: u32,
-        flags: u32,
-        template: usize,
-    ) -> isize;
-
-    /// Reads bytes from a file handle.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-readfile
-    fn ReadFile(
-        file: isize,
-        buffer: *mut u8,
-        to_read: u32,
-        read: *mut u32,
-        overlapped: usize,
-    ) -> i32;
-
-    /// Closes a kernel object handle.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
-    fn CloseHandle(handle: isize) -> i32;
-
-    /// Returns file attributes, or INVALID_FILE_ATTRIBUTES if not found.
-    /// Used here as a lightweight file-existence check.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfileattributesw
-    fn GetFileAttributesW(name: *const u16) -> u32;
-
-    /// Retrieves the value of an environment variable.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-getenvironmentvariablew
-    fn GetEnvironmentVariableW(name: *const u16, buffer: *mut u16, size: u32) -> u32;
-
-    /// Sets or deletes an environment variable (pass null value to delete).
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-setenvironmentvariablew
-    fn SetEnvironmentVariableW(name: *const u16, value: *const u16) -> i32;
-
-    /// Creates a new process and its primary thread.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessw
-    fn CreateProcessW(
-        app: *const u16,
-        cmd: *mut u16,
-        proc_attr: usize,
-        thread_attr: usize,
-        inherit: i32,
-        flags: u32,
-        env: usize,
-        dir: usize,
-        startup: *const StartupInfoW,
-        info: *mut ProcessInformation,
-    ) -> i32;
-
-    /// Waits until a handle is signaled (process exits) or timeout elapses.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
-    fn WaitForSingleObject(handle: isize, ms: u32) -> u32;
-
-    /// Retrieves the exit code of a process.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getexitcodeprocess
-    fn GetExitCodeProcess(process: isize, code: *mut u32) -> i32;
-
-    /// Terminates the calling process with the given exit code.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-exitprocess
-    fn ExitProcess(code: u32) -> !;
-
-    /// Returns a handle to stdin, stdout, or stderr.
-    /// https://learn.microsoft.com/en-us/windows/console/getstdhandle
-    fn GetStdHandle(id: u32) -> isize;
-
-    /// Returns a pointer to the command-line string for the current process.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/processenv/nf-processenv-getcommandlinew
-    fn GetCommandLineW() -> *const u16;
-
-    /// Writes bytes to a file handle (used here for stderr output).
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-writefile
-    fn WriteFile(
-        file: isize,
-        buffer: *const u8,
-        to_write: u32,
-        written: *mut u32,
-        overlapped: usize,
-    ) -> i32;
-
-    /// Creates a directory.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createdirectoryw
-    fn CreateDirectoryW(path: *const u16, security: usize) -> i32;
-
-    /// Deletes a file.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-deletefilew
-    fn DeleteFileW(path: *const u16) -> i32;
-
-    /// Returns system info including processor architecture, using the
-    /// native architecture even when called from a WoW64 process.
-    /// https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
-    fn GetNativeSystemInfo(info: *mut SystemInfo);
-}
-
 // A fixed-capacity UTF-16 buffer for building null-terminated wide strings
 // to pass to Win32 APIs. All Win32-facing methods automatically null-terminate.
 //
@@ -341,13 +159,6 @@ unsafe fn get_env<const N: usize>(name: &[u8], dst: &mut WBuf<N>) -> usize {
     n
 }
 
-/// Unset an environment variable.
-unsafe fn unset_env(name: &[u8]) {
-    let mut name_w = WBuf::<64>::new();
-    name_w.push_ascii(name);
-    SetEnvironmentVariableW(name_w.as_ptr(), ptr::null());
-}
-
 /// C runtime entry point for MinGW/MSVC. Called before main() would be.
 /// We use #[no_main] so we define this directly.
 #[unsafe(no_mangle)]
@@ -358,7 +169,7 @@ pub extern "C" fn mainCRTStartup() -> ! {
 unsafe fn main_impl() -> ! {
     // Get our own exe path, e.g. "C:\Users\...\tailscale\tool\go.exe".
     let mut exe = WBuf::<4096>::new();
-    exe.len = GetModuleFileNameW(0, exe.buf.as_mut_ptr(), exe.buf.len() as u32) as usize;
+    exe.len = GetModuleFileNameW(null_mut(), exe.buf.as_mut_ptr(), exe.buf.len() as u32) as usize;
     if exe.len == 0 {
         die(b"GetModuleFileNameW failed\n");
     }
@@ -429,7 +240,7 @@ unsafe fn main_impl() -> ! {
     // Unset GOROOT to avoid breaking builds that depend on our Go
     // fork's patches (e.g. net/). The Go toolchain sets GOROOT
     // internally from its own location.
-    unset_env(b"GOROOT");
+    SetEnvironmentVariableW(w!("GOROOT"), null());
 
     // Build the new command line by replacing argv[0] with the real
     // go.exe path. We take the raw command line from GetCommandLineW
@@ -445,7 +256,7 @@ unsafe fn main_impl() -> ! {
     cmd.push_ptr(args_tail);
 
     // Exec: create the child process, wait for it, and exit with its code.
-    let code = run_and_wait(go_exe.as_ptr(), &mut cmd, ptr::null());
+    let code = run_and_wait(go_exe.as_ptr(), &mut cmd, null());
     ExitProcess(code);
 }
 
@@ -461,20 +272,21 @@ unsafe fn download_toolchain(toolchain: &WBuf<4096>, rev: &[u8]) {
     let mut dir = WBuf::<4096>::new();
     get_env(b"USERPROFILE", &mut dir);
     dir.push_ascii(b"\\.cache");
-    CreateDirectoryW(dir.as_ptr(), 0);
+    CreateDirectoryW(dir.as_ptr(), null());
     dir.push_ascii(b"\\tsgo");
-    CreateDirectoryW(dir.as_ptr(), 0);
+    CreateDirectoryW(dir.as_ptr(), null());
 
     // Create the toolchain directory itself.
     let mut tc_dir = WBuf::<4096>::new();
     tc_dir.push_wbuf(toolchain);
-    CreateDirectoryW(tc_dir.as_ptr(), 0);
+    CreateDirectoryW(tc_dir.as_ptr(), null());
 
     // Detect host architecture via GetNativeSystemInfo (gives real arch
     // even from a WoW64 32-bit process).
-    let mut si: SystemInfo = core::mem::zeroed();
+    let mut si = core::mem::zeroed();
     GetNativeSystemInfo(&mut si);
-    let arch: &[u8] = match si.processor_architecture {
+    
+    let arch: &[u8] = match si.Anonymous.Anonymous.wProcessorArchitecture as u16 {
         PROCESSOR_ARCHITECTURE_AMD64 => b"amd64",
         PROCESSOR_ARCHITECTURE_ARM64 => b"arm64",
         PROCESSOR_ARCHITECTURE_INTEL => b"386",
@@ -507,7 +319,7 @@ unsafe fn download_toolchain(toolchain: &WBuf<4096>, rev: &[u8]) {
     cmd.push_ascii(b"\" ");
     cmd.push_ascii(&url[..u]);
 
-    let code = run_and_wait(ptr::null(), &mut cmd, ptr::null());
+    let code = run_and_wait(null(), &mut cmd, null());
     if code != 0 {
         die(b"curl failed to download Go toolchain\n");
     }
@@ -519,7 +331,7 @@ unsafe fn download_toolchain(toolchain: &WBuf<4096>, rev: &[u8]) {
     cmd.push_wbuf(&tgz);
     cmd.push_ascii(b"\"");
 
-    let code = run_and_wait(ptr::null(), &mut cmd, tc_dir.as_ptr());
+    let code = run_and_wait(null(), &mut cmd, tc_dir.as_ptr());
     if code != 0 {
         die(b"tar failed to extract Go toolchain\n");
     }
@@ -527,10 +339,10 @@ unsafe fn download_toolchain(toolchain: &WBuf<4096>, rev: &[u8]) {
     // Write the .extracted marker file.
     let mut marker = WBuf::<4096>::new();
     marker.push_wbuf(toolchain).push_ascii(b".extracted");
-    let fh = CreateFileW(marker.as_ptr(), GENERIC_WRITE, 0, 0, CREATE_ALWAYS, 0, 0);
+    let fh = CreateFileW(marker.as_ptr(), GENERIC_WRITE, 0, null(), CREATE_ALWAYS, 0, null_mut());
     if fh != INVALID_HANDLE_VALUE {
         let mut written: u32 = 0;
-        WriteFile(fh, rev.as_ptr(), rev.len() as u32, &mut written, 0);
+        WriteFile(fh, rev.as_ptr(), rev.len() as u32, &mut written, null_mut());
         CloseHandle(fh);
     }
 
@@ -542,42 +354,25 @@ unsafe fn download_toolchain(toolchain: &WBuf<4096>, rev: &[u8]) {
 /// If app is null, CreateProcessW searches PATH using the command line.
 /// If dir is null, the child inherits the current directory.
 unsafe fn run_and_wait(app: *const u16, cmd: &mut WBuf<32768>, dir: *const u16) -> u32 {
-    let si = StartupInfoW {
-        cb: core::mem::size_of::<StartupInfoW>() as u32,
-        reserved: 0,
-        desktop: 0,
-        title: 0,
-        x: 0,
-        y: 0,
-        x_size: 0,
-        y_size: 0,
-        x_count_chars: 0,
-        y_count_chars: 0,
-        fill_attribute: 0,
-        flags: STARTF_USESTDHANDLES,
-        show_window: 0,
-        cb_reserved2: 0,
-        reserved2: 0,
-        std_input: GetStdHandle(STD_INPUT_HANDLE),
-        std_output: GetStdHandle(STD_OUTPUT_HANDLE),
-        std_error: GetStdHandle(STD_ERROR_HANDLE),
-    };
-    let mut pi = ProcessInformation {
-        process: 0,
-        thread: 0,
-        process_id: 0,
-        thread_id: 0,
+    let si = STARTUPINFOW {
+        cb: size_of::<STARTUPINFOW>() as u32,
+        dwFlags: STARTF_USESTDHANDLES,
+        hStdInput: GetStdHandle(STD_INPUT_HANDLE),
+        hStdOutput: GetStdHandle(STD_OUTPUT_HANDLE), 
+        hStdError: GetStdHandle(STD_ERROR_HANDLE),
+        ..Default::default()
     };
+    let mut pi = PROCESS_INFORMATION::default();
 
     if CreateProcessW(
         app,
         cmd.as_mut_ptr(),
-        0,
-        0,
+        null(),
+        null(),
         1, // bInheritHandles = TRUE
         0,
-        0,
-        dir as usize,
+        null(),
+        dir,
         &si,
         &mut pi,
     ) == 0
@@ -585,11 +380,11 @@ unsafe fn run_and_wait(app: *const u16, cmd: &mut WBuf<32768>, dir: *const u16)
         die(b"CreateProcess failed\n");
     }
 
-    WaitForSingleObject(pi.process, INFINITE);
+    WaitForSingleObject(pi.hProcess, INFINITE);
     let mut code: u32 = 1;
-    GetExitCodeProcess(pi.process, &mut code);
-    CloseHandle(pi.process);
-    CloseHandle(pi.thread);
+    GetExitCodeProcess(pi.hProcess, &mut code);
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
     code
 }
 
@@ -607,7 +402,7 @@ unsafe fn fallback_pwsh(repo_root: &WBuf<4096>) -> ! {
     cmd.push_ptr(args_tail);
 
     // Pass null for lpApplicationName so CreateProcessW searches PATH for "pwsh".
-    let code = run_and_wait(ptr::null(), &mut cmd, ptr::null());
+    let code = run_and_wait(null(), &mut cmd, null());
     ExitProcess(code);
 }
 
@@ -621,16 +416,16 @@ unsafe fn read_file_trimmed<'a, const N: usize>(
         path.as_ptr(),
         GENERIC_READ,
         FILE_SHARE_READ,
-        0,
+        null(),
         OPEN_EXISTING,
         0,
-        0,
+        null_mut(),
     );
     if h == INVALID_HANDLE_VALUE {
         die(b"cannot open go.toolchain.rev\n");
     }
     let mut n: u32 = 0;
-    ReadFile(h, buf.as_mut_ptr(), buf.len() as u32, &mut n, 0);
+    ReadFile(h, buf.as_mut_ptr(), buf.len() as u32, &mut n, null_mut());
     CloseHandle(h);
 
     let s = &buf[..n as usize];
@@ -670,7 +465,7 @@ unsafe fn skip_argv0(cmd: *const u16) -> *const u16 {
 unsafe fn stderr(msg: &[u8]) {
     let h = GetStdHandle(STD_ERROR_HANDLE);
     let mut n: u32 = 0;
-    WriteFile(h, msg.as_ptr(), msg.len() as u32, &mut n, 0);
+    WriteFile(h, msg.as_ptr(), msg.len() as u32, &mut n, null_mut());
 }
 
 /// Write an error message to stderr and terminate with exit code 1.
@@ -680,6 +475,7 @@ unsafe fn die(msg: &[u8]) -> ! {
     ExitProcess(1);
 }
 
+#[cfg(not(test))]
 #[panic_handler]
 fn panic(_: &core::panic::PanicInfo) -> ! {
     unsafe { ExitProcess(EXIT_CODE_PANIC) }