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A low-level build system, used by Xcode and the Swift Package Manager
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`llbuildSwift` fails to build with SwiftPM release configuration on Windows x86_64 #844

Open stevapple opened 2 years ago

stevapple commented 2 years ago

It will produce "Function has token parameter but isn't an intrinsic" error on nearly every file, which may be related to llvm/llvm-project#40056

Function has token parameter but isn't an intrinsic
  call void @"?readFile@CAPIManifestActions@?A0x8C4B31D0@@UEAA?AV?$unique_ptr@VMemoryBuffer@llvm@@U?$default_delete@VMemoryBuffer@llvm@@@std@@@std@@VStringRef@llvm@@0PEBUToken@ninja@llbuild@@@Z.cold.1"(%"class.llvm::ErrorOr"* %bufferOrError, token %44) #29, !dbg !8274
in function ?readFile@CAPIManifestActions@?A0x8C4B31D0@@UEAA?AV?$unique_ptr@VMemoryBuffer@llvm@@U?$default_delete@VMemoryBuffer@llvm@@@std@@@std@@VStringRef@llvm@@0PEBUToken@ninja@llbuild@@@Z
fatal error: error in backend: Broken function found, compilation aborted!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: T:\\Library\\Developer\\Toolchains\\unknown-Asserts-development.xctoolchain\\usr\\bin\\clang.exe -target x86_64-unknown-windows-msvc -g -gcodeview -O2 -DSWIFT_PACKAGE=1 -fblocks -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\products\\libllbuild\\include -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\Ninja\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llbuildNinja.build\\module.modulemap -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\BuildSystem\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llbuildBuildSystem.build\\module.modulemap -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\Core\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llbuildCore.build\\module.modulemap -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\Basic\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llbuildBasic.build\\module.modulemap -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\llvm\\Support\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llvmSupport.build\\module.modulemap -I C:\\Users\\stevapple\\workspace\\swift-llbuild\\lib\\llvm\\Demangle\\include -fmodule-map-file=C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llvmDemangle.build\\module.modulemap -DLLVM_ON_WIN32 -Dlibllbuild_EXPORTS -D_MT -D_DLL -Xclang --dependent-lib=msvcrt -MD -MT dependencies -MF C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\libllbuild.build\\Ninja-C-API.cpp.d -std=c++14 -c C:\\Users\\stevapple\\workspace\\swift-llbuild\\products\\libllbuild\\Ninja-C-API.cpp -o C:\\Users\\stevapple\\workspace\\swift-llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\libllbuild.build\\Ninja-C-API.cpp.o
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'C:\Users\stevapple\workspace\swift-llbuild\products\libllbuild\Ninja-C-API.cpp'.
4.      Running pass 'Module Verifier' on function '@"?readFile@CAPIManifestActions@?A0x8C4B31D0@@UEAA?AV?$unique_ptr@VMemoryBuffer@llvm@@U?$default_delete@VMemoryBuffer@llvm@@@std@@@std@@VStringRef@llvm@@0PEBUToken@ninja@llbuild@@@Z"'
 #0 0x00007ff838734fd9 (C:\windows\System32\KERNELBASE.dll+0x34fd9)
 #1 0x00007ff6e93b335a (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x170335a)
 #2 0x00007ff6e93b6f53 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1706f53)
 #3 0x00007ff6e7d3ce60 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x8ce60)
 #4 0x00007ff6e93be66e (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x170e66e)
 #5 0x00007ff6e93be751 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x170e751)
 #6 0x00007ff6e8dd062d (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x112062d)
 #7 0x00007ff6e8cc80ac (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x10180ac)
 #8 0x00007ff6e8cc8310 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1018310)
 #9 0x00007ff6e8cc85ca (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x10185ca)
#10 0x00007ff6e8cc7d67 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1017d67)
#11 0x00007ff6e9767bc8 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1ab7bc8)
#12 0x00007ff6e9766d3f (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1ab6d3f)
#13 0x00007ff6e97675e5 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1ab75e5)
#14 0x00007ff6ebe4552f (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x419552f)
#15 0x00007ff6eabdc053 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x2f2c053)
#16 0x00007ff6e9da3d3e (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x20f3d3e)
#17 0x00007ff6ebe43fdb (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x4193fdb)
#18 0x00007ff6e9da3b3e (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x20f3b3e)
#19 0x00007ff6e9d678df (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x20b78df)
#20 0x00007ff6e9e1c389 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x216c389)
#21 0x00007ff6e7d3e292 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x8e292)
#22 0x00007ff6e7d314c6 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x814c6)
#23 0x00007ff6e9c78567 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1fc8567)
#24 0x00007ff6e93b347f (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x170347f)
#25 0x00007ff6e9c78b58 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1fc8b58)
#26 0x00007ff6e9bef449 (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1f3f449)
#27 0x00007ff6e9bef5ec (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1f3f5ec)
#28 0x00007ff6e9bd691c (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x1f2691c)
#29 0x00007ff6e7d33acc (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x83acc)
#30 0x00007ff6ebb35d7c (T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\clang.exe+0x3e85d7c)
#31 0x00007ff83a367034 (C:\windows\System32\KERNEL32.DLL+0x17034)
#32 0x00007ff83a9c26a1 (C:\windows\SYSTEM32\ntdll.dll+0x526a1)
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
swift.org clang version 15.0.0
Target: x86_64-unknown-windows-msvc
Thread model: posix
InstalledDir: T:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin

Although it's most probably a clang bug, we can see if it's workaround-able, so it won't block us for building "release" Swift tools with SwiftPM.

hiraditya commented 1 year ago

can you try with -fno-split-cold-code as mentioned in https://github.com/bazelbuild/rules_swift/pull/831/files if that fixes it? Do you have instructions to build llbuildSwift which I can try to repro this?

compnerd commented 1 year ago

@hiraditya, -fno-split-cold-code does workaround the issue. You can likely follow the build here: https://github.com/compnerd/swift-build/blob/main/.github/workflows/swift-toolchain.yml#L1274-L1296

Disabling the bindings should allow you to build without the Swift compiler.

hiraditya commented 1 year ago

Is it possible to get the preprocessed(.ii) file for the file producing crash, e.g., Nina-C-API.cpp . I don't have windows machine or the toolchain but with preprocessed file the crash should be reproducible on linux machine (with right compiler flags).

compnerd commented 1 year ago

SourceMgr-7d4fb7.zip

Function has token parameter but isn't an intrinsic
  call void @"?AddIncludeFile@SourceMgr@llvm@@QEAAIAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@VSMLoc@2@AEAV34@@Z.cold.1"(ptr %NewBufOrErr, token %51) #33, !dbg !8335
in function ?AddIncludeFile@SourceMgr@llvm@@QEAAIAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@VSMLoc@2@AEAV34@@Z
fatal error: error in backend: Broken function found, compilation aborted!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: S:\\Library\\Developer\\Toolchains\\unknown-Asserts-development.xctoolchain\\usr\\bin\\clang.exe -target x86_64-unknown-windows-msvc -g -gcodeview -O2 -DSWIFT_PACKAGE=1 -fblocks -I S:\\SourceCache\\swift-project\\llbuild\\lib\\llvm\\Support\\include -I S:\\SourceCache\\swift-project\\llbuild\\lib\\llvm\\Demangle\\include -fmodule-map-file=S:\\SourceCache\\swift-project\\llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llvmDemangle.build\\module.modulemap -DLLVM_ON_WIN32 -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS -D_MT -D_DLL -Xclang --dependent-lib=msvcrt -IS:\\Library\\sqlite-3.36.0\\usr\\include -MD -MT dependencies -MF S:\\SourceCache\\swift-project\\llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llvmSupport.build\\SourceMgr.cpp.d -std=c++14 -c S:\\SourceCache\\swift-project\\llbuild\\lib\\llvm\\Support\\SourceMgr.cpp -o S:\\SourceCache\\swift-project\\llbuild\\.build\\x86_64-unknown-windows-msvc\\release\\llvmSupport.build\\SourceMgr.cpp.o
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'S:\SourceCache\swift-project\llbuild\lib\llvm\Support\SourceMgr.cpp'.
4.      Running pass 'Module Verifier' on function '@"?AddIncludeFile@SourceMgr@llvm@@QEAAIAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@VSMLoc@2@AEAV34@@Z"'
Exception Code: 0xE0000046
 #0 0x00007ffcef7bfe7c (C:\Windows\System32\KERNELBASE.dll+0x8fe7c)
 #1 0x00007ff6dd64c00a llvm::CrashRecoveryContext::HandleExit(int) S:\SourceCache\swift-project\llvm-project\llvm\lib\Support\CrashRecoveryContext.cpp:450:0
 #2 0x00007ff6dd64fcf3 llvm::sys::Process::Exit(int, bool) S:\SourceCache\swift-project\llvm-project\llvm\lib\Support\Process.cpp:97:0
 #3 0x00007ff6dbfc2d70 LLVMErrorHandler S:\SourceCache\swift-project\llvm-project\clang\tools\driver\cc1_main.cpp:96:0
 #4 0x00007ff6dd620cd6 std::basic_string<char,std::char_traits<char>,std::allocator<char> >::{dtor} C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.35.32215\include\xstring:3270:0
 #5 0x00007ff6dd620cd6 llvm::report_fatal_error(class llvm::Twine const &, bool) S:\SourceCache\swift-project\llvm-project\llvm\lib\Support\ErrorHandling.cpp:104:0
 #6 0x00007ff6dd620e71 llvm::report_fatal_error(char const *, bool) S:\SourceCache\swift-project\llvm-project\llvm\lib\Support\ErrorHandling.cpp:83:0
 #7 0x00007ff6dd0d9c60 `anonymous namespace'::VerifierLegacyPass::runOnFunction S:\SourceCache\swift-project\llvm-project\llvm\lib\IR\Verifier.cpp:6411:0
 #8 0x00007ff6dcfc9319 llvm::FPPassManager::runOnFunction(class llvm::Function &) S:\SourceCache\swift-project\llvm-project\llvm\lib\IR\LegacyPassManager.cpp:1430:0
 #9 0x00007ff6dcfc9570 llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Function,1,0,void>,0,0>::operator++ S:\SourceCache\swift-project\llvm-project\llvm\include\llvm\ADT\ilist_iterator.h:157:0
#10 0x00007ff6dcfc9570 llvm::FPPassManager::runOnModule(class llvm::Module &) S:\SourceCache\swift-project\llvm-project\llvm\lib\IR\LegacyPassManager.cpp:1475:0
#11 0x00007ff6dcfc9827 `anonymous namespace'::MPPassManager::runOnModule S:\SourceCache\swift-project\llvm-project\llvm\lib\IR\LegacyPassManager.cpp:1545:0
#12 0x00007ff6dcfc8fd7 llvm::legacy::PassManager::run(class llvm::Module &) S:\SourceCache\swift-project\llvm-project\llvm\lib\IR\LegacyPassManager.cpp:1672:0
#13 0x00007ff6dda37e15 `anonymous namespace'::EmitAssemblyHelper::RunCodegenPipeline S:\SourceCache\swift-project\llvm-project\clang\lib\CodeGen\BackendUtil.cpp:1071:0
#14 0x00007ff6dda36f16 std::unique_ptr<llvm::ToolOutputFile,std::default_delete<llvm::ToolOutputFile> >::operator bool C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.35.32215\include\memory:3202:0
#15 0x00007ff6dda36f16 `anonymous namespace'::EmitAssemblyHelper::EmitAssembly S:\SourceCache\swift-project\llvm-project\clang\lib\CodeGen\BackendUtil.cpp:1094:0
#16 0x00007ff6dda37821 std::unique_ptr<llvm::TargetMachine,std::default_delete<llvm::TargetMachine> >::operator bool C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.35.32215\include\memory:3202:0
#17 0x00007ff6dda37821 clang::EmitBackendOutput(class clang::DiagnosticsEngine &, class clang::HeaderSearchOptions const &, class clang::CodeGenOptions const &, class clang::TargetOptions const &, class clang::LangOptions const &, class llvm::StringRef, class llvm::Module *, enum clang::BackendAction, class llvm::IntrusiveRefCntPtr<class llvm::vfs::FileSystem>, class std::unique_ptr<class llvm::raw_pwrite_stream, struct std::default_delete<class llvm::raw_pwrite_stream>>) S:\SourceCache\swift-project\llvm-project\clang\lib\CodeGen\BackendUtil.cpp:1254:0
#18 0x00007ff6e03c4ac8 clang::BackendConsumer::HandleTranslationUnit(class clang::ASTContext &) S:\SourceCache\swift-project\llvm-project\clang\lib\CodeGen\CodeGenAction.cpp:386:0
#19 0x00007ff6def4b097 clang::finalize S:\SourceCache\swift-project\llvm-project\clang\include\clang\Sema\TemplateInstCallback.h:54:0
#20 0x00007ff6def4b097 clang::ParseAST(class clang::Sema &, bool, bool) S:\SourceCache\swift-project\llvm-project\clang\lib\Parse\ParseAST.cpp:203:0
#21 0x00007ff6de134ab0 clang::ASTFrontendAction::ExecuteAction(void) S:\SourceCache\swift-project\llvm-project\clang\lib\Frontend\FrontendAction.cpp:1218:0
#22 0x00007ff6e03c352b clang::CodeGenAction::ExecuteAction(void) S:\SourceCache\swift-project\llvm-project\clang\lib\CodeGen\CodeGenAction.cpp:1221:0
#23 0x00007ff6de13489e clang::FrontendAction::Execute(void) S:\SourceCache\swift-project\llvm-project\clang\lib\Frontend\FrontendAction.cpp:1115:0
#24 0x00007ff6de0f7553 llvm::Error::getPtr S:\SourceCache\swift-project\llvm-project\llvm\include\llvm\Support\Error.h:270:0
#25 0x00007ff6de0f7553 llvm::Error::operator bool S:\SourceCache\swift-project\llvm-project\llvm\include\llvm\Support\Error.h:234:0
#26 0x00007ff6de0f7553 clang::CompilerInstance::ExecuteAction(class clang::FrontendAction &) S:\SourceCache\swift-project\llvm-project\clang\lib\Frontend\CompilerInstance.cpp:1070:0
#27 0x00007ff6de1b0fab clang::ExecuteCompilerInvocation(class clang::CompilerInstance *) S:\SourceCache\swift-project\llvm-project\clang\lib\FrontendTool\ExecuteCompilerInvocation.cpp:273:0
#28 0x00007ff6dbfc40f2 cc1_main(class llvm::ArrayRef<char const *>, char const *, void *) S:\SourceCache\swift-project\llvm-project\clang\tools\driver\cc1_main.cpp:1248:0
#29 0x00007ff6dbfabc1a ExecuteCC1Tool S:\SourceCache\swift-project\llvm-project\clang\tools\driver\driver.cpp:370:0
#30 0x00007ff6ddffe1fa clang::driver::CC1Command::Execute::__l7::<lambda_1>::operator() S:\SourceCache\swift-project\llvm-project\clang\lib\Driver\Job.cpp:465:0
#31 0x00007ff6ddffe1fa llvm::function_ref<void __cdecl(void)>::callback_fn<`clang::driver::CC1Command::Execute'::`7'::<lambda_1> > S:\SourceCache\swift-project\llvm-project\llvm\include\llvm\ADT\STLFunctionalExtras.h:45:0
#32 0x00007ff6dd64c0df llvm::CrashRecoveryContext::RunSafely(class llvm::function_ref<(void)>) S:\SourceCache\swift-project\llvm-project\llvm\lib\Support\CrashRecoveryContext.cpp:242:0
#33 0x00007ff6ddffe818 clang::driver::CC1Command::Execute(class llvm::ArrayRef<class llvm::Optional<class llvm::StringRef>>, class std::basic_string<char, struct std::char_traits<char>, class std::allocator<char>> *, bool *) const S:\SourceCache\swift-project\llvm-project\clang\lib\Driver\Job.cpp:465:0
#34 0x00007ff6ddf769c5 std::_Func_class<void,clang::driver::Command const &,int>::_Empty C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.35.32215\include\functional:888:0
#35 0x00007ff6ddf769c5 std::function<void __cdecl(clang::driver::Command const &,int)>::operator bool C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.35.32215\include\functional:1118:0
#36 0x00007ff6ddf769c5 clang::driver::Compilation::ExecuteCommand(class clang::driver::Command const &, class clang::driver::Command const *&, bool) const S:\SourceCache\swift-project\llvm-project\clang\lib\Driver\Compilation.cpp:201:0
#37 0x00007ff6ddf76b70 clang::driver::Compilation::ExecuteJobs(class clang::driver::JobList const &, class llvm::SmallVectorImpl<struct std::pair<int, class clang::driver::Command const *>> &, bool) const S:\SourceCache\swift-project\llvm-project\clang\lib\Driver\Compilation.cpp:254:0
#38 0x00007ff6ddf5c2d0 llvm::SmallVectorBase<unsigned int>::empty S:\SourceCache\swift-project\llvm-project\llvm\include\llvm\ADT\SmallVector.h:94:0
#39 0x00007ff6ddf5c2d0 clang::driver::Driver::ExecuteCompilation(class clang::driver::Compilation &, class llvm::SmallVectorImpl<struct std::pair<int, class clang::driver::Command const *>> &) S:\SourceCache\swift-project\llvm-project\clang\lib\Driver\Driver.cpp:1825:0
#40 0x00007ff6dbfaeab9 clang_main(int, char **) S:\SourceCache\swift-project\llvm-project\clang\tools\driver\driver.cpp:550:0
#41 0x00007ff6dffe6194 invoke_main D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78:0
#42 0x00007ff6dffe6194 __scrt_common_main_seh D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288:0
#43 0x00007ffcf01a26bd (C:\Windows\System32\KERNEL32.DLL+0x126bd)
#44 0x00007ffcf234a9f8 (C:\Windows\SYSTEM32\ntdll.dll+0x5a9f8)

It is a different function and file, but the issue should be the same. Thanks for looking into this @hiraditya!

hiraditya commented 1 year ago

i'm unable to repro with the script and pre-processed file on Linux machine. I am using latest clang on x64 Ubuntu machine. Do we know the SHA of the compiler? or if I can download the compiler (for Windows) that's also fine, as I got hold of a Windows machine.