-Cpanic=abort IllegalInstruction in build script

[Speedy37]

I tried this code:

RUSTFLAGS="-Cpanic=abort"

On this repository: https://github.com/Clikengo/foundationdb-rs

I expected to see this happen: A correct build or a correct abort call

Instead, this happened: the processor reach an illegal instruction.

https://github.com/Clikengo/foundationdb-rs/runs/709083830

I was able to reproduce the crash locally on windows.
Building foundationdb-sys alone doesn't crash, but while building foundationdb-sys for foundationdb it does.

Meta

rustc --version --verbose:

rustc 1.43.1 (8d69840ab 2020-05-04)
binary: rustc
commit-hash: 8d69840ab92ea7f4d323420088dd8c9775f180cd
commit-date: 2020-05-04
host: x86_64-pc-windows-msvc
release: 1.43.1
LLVM version: 9.0

Backtrace

>	build-script-build.exe!panic_abort::__rust_start_panic()	Unknown	Non-user code. Symbols loaded.
 	build-script-build.exe!std::panicking::rust_panic() Line 522	Unknown	Symbols loaded.
 	build-script-build.exe!std::panicking::rust_panic_with_hook() Line 492	Unknown	Symbols loaded.
 	build-script-build.exe!std::panicking::begin_panic<str*>() Line 397	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>::replace() Line 74	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!proc_macro::bridge::client::{{impl}}::with::{{closure}}() Line 284	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!std::thread::local::LocalKey<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>>::try_with() Line 262	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!std::thread::local::LocalKey<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>>::with() Line 239	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!proc_macro::bridge::client::BridgeState::with() Line 283	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!proc_macro::bridge::Bridge::with() Line 314	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!proc_macro::bridge::client::Span::call_site() Line 230	Unknown	Symbols loaded.
 	build-script-build.exe!proc_macro::Span::call_site() Line 271	Unknown	Symbols loaded.
 	build-script-build.exe!core::ops::function::FnOnce::call_once<fn() -> proc_macro::Span,()>(proc_macro::Span(*)()) Line 232	Unknown	Symbols loaded.
 	build-script-build.exe!std::panicking::try::do_call<fn() -> proc_macro::Span,proc_macro::Span>(unsigned char * data) Line 303	Unknown	Symbols loaded.
 	build-script-build.exe!panic_abort::__rust_maybe_catch_panic() Line 32	Unknown	Symbols loaded.
 	build-script-build.exe!std::panicking::try<proc_macro::Span,fn() -> proc_macro::Span>(proc_macro::Span(*)() f) Line 281	Unknown	Symbols loaded.
 	build-script-build.exe!std::panic::catch_unwind<fn() -> proc_macro::Span,proc_macro::Span>(proc_macro::Span(*)() f) Line 395	Unknown	Symbols loaded.
 	build-script-build.exe!proc_macro2::detection::initialize() Line 59	Unknown	Symbols loaded.
 	build-script-build.exe!core::ops::function::FnOnce::call_once<fn(),()>(void(*)()) Line 232	Unknown	Symbols loaded.
 	build-script-build.exe!std::sync::once::{{impl}}::call_once::{{closure}}<fn()>(std::sync::once::{{impl}}::call_once::closure-0 *, bool) Line 264	Unknown	Symbols loaded.
 	build-script-build.exe!std::sync::once::Once::call_inner() Line 417	Unknown	Symbols loaded.
 	build-script-build.exe!std::sync::once::Once::call_once<fn()>(void(*)() self) Line 265	Unknown	Symbols loaded.
 	build-script-build.exe!proc_macro2::detection::inside_proc_macro() Line 15	Unknown	Symbols loaded.
 	build-script-build.exe!proc_macro2::imp::Span::call_site() Line 372	Unknown	Symbols loaded.
 	build-script-build.exe!proc_macro2::Span::call_site() Line 362	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::ir::context::BindgenContext::rust_ident_raw<alloc::borrow::Cow<str>>(alloc::borrow::Cow<str> self) Line 894	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::ir::context::BindgenContext::rust_ident<alloc::string::String*>(alloc::string::String * self) Line 887	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::codegen::{{impl}}::codegen(bindgen::ir::var::Var * self, bindgen::ir::context::BindgenContext * ctx, bindgen::codegen::CodegenResult * result, bindgen::ir::item::Item * item) Line 502	Unknown	Symbols loaded.
 	build-script-build.exe!00007ff7d1997fc1() Line 370	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::codegen::{{impl}}::codegen::{{closure}}(bindgen::codegen::{{impl}}::codegen::closure-0 * result, bindgen::codegen::CodegenResult * found_any, bool *) Line 401	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::codegen::{{impl}}::codegen(bindgen::ir::module::Module * self, bindgen::ir::context::BindgenContext * ctx, bindgen::codegen::CodegenResult * result, bindgen::ir::item::Item * item) Line 434	Unknown	Symbols loaded.
 	build-script-build.exe!00007ff7d1997f57() Line 370	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::codegen::codegen::{{closure}}(bindgen::codegen::codegen::closure-0, bindgen::ir::context::BindgenContext * context) Line 3891	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::ir::context::BindgenContext::gen<closure-0,alloc::vec::Vec<proc_macro2::TokenStream>>(bindgen::ir::context::BindgenContext self, bindgen::codegen::codegen::closure-0 cb) Line 1208	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::codegen::codegen(bindgen::ir::context::BindgenContext context) Line 3893	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::Bindings::generate(bindgen::BindgenOptions options) Line 2116	Unknown	Symbols loaded.
 	build-script-build.exe!bindgen::Builder::generate(bindgen::Builder self) Line 1423	Unknown	Symbols loaded.
 	build-script-build.exe!build_script_build::main() Line 95	Unknown	Symbols loaded.
 	build-script-build.exe!std::rt::lang_start::{{closure}}<()>(std::rt::lang_start::closure-0 *) Line 67	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!std::rt::lang_start_internal::{{closure}}() Line 52	Unknown	Symbols loaded.
 	build-script-build.exe!std::panicking::try::do_call<closure-0,i32>() Line 303	Unknown	Symbols loaded.
 	build-script-build.exe!panic_abort::__rust_maybe_catch_panic() Line 32	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!std::panicking::try() Line 281	Unknown	Symbols loaded.
 	[Inline Frame] build-script-build.exe!std::panic::catch_unwind() Line 394	Unknown	Symbols loaded.
 	build-script-build.exe!std::rt::lang_start_internal() Line 51	Unknown	Symbols loaded.
 	build-script-build.exe!std::rt::lang_start<()>(void(*)() main, __int64 argc, unsigned char * * argv) Line 67	Unknown	Symbols loaded.

[Speedy37]

Well, I guess, this is expected behavior of panic on windows.

To give a bit of context, I want to build this code with code coverage, and due to the removal of -Zno-landings-pads I was migrating to use -Cpanic=abort.

I don't know how I should resolve this problem, proc_macro2 use catch_unwind and this embeded quite deep inside the bindgen crate.

Is there a way to execute build script without -Cpanic=abort while still building the crate with -Cpanic=abort ?

[Speedy37]

I guess this is cargo related rust-lang/cargo#6375