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ICE: panic when resolving macros #55457
Description
I've managed to reduce the exploding code to:
mod sub_mod {
use serde_derive::serde;
use serde::Serialize;
#[serde(bound(deserialize = ""))]
#[derive(Serialize)]
struct Struct {}
}
fn main() {
}link to proof in rust-playground
I get an ICE on stable, beta and nightly channels.
backtrace running stable 1.30.0
thread 'main' panicked at 'expected `Def::Macro` or `Def::NonMacroAttr`', librustc_resolve/macros.rs:476:18
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
1: std::sys_common::backtrace::print
2: std::panicking::default_hook::{{closure}}
3: std::panicking::default_hook
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
6: std::panicking::begin_panic
7: rustc_resolve::macros::<impl rustc_resolve::Resolver<'a, 'cl>>::resolve_macro_to_def
8: rustc_resolve::macros::<impl rustc_resolve::Resolver<'a, 'cl>>::resolve_lexical_macro_path_segment
9: rustc_resolve::macros::<impl rustc_resolve::Resolver<'a, 'cl>>::finalize_current_module_macro_resolutions
10: rustc_resolve::Resolver::resolve_item
11: rustc_resolve::Resolver::resolve_crate
12: rustc::util::common::time
13: rustc_driver::driver::phase_2_configure_and_expand
14: rustc_driver::driver::compile_input
15: rustc_driver::run_compiler_with_pool
16: rustc_driver::driver::spawn_thread_pool
17: rustc_driver::run_compiler
18: <scoped_tls::ScopedKey<T>>::set
19: syntax::with_globals
20: __rust_maybe_catch_panic
21: rustc_driver::run
22: rustc_driver::main
23: std::rt::lang_start::{{closure}}
24: std::panicking::try::do_call
25: __rust_maybe_catch_panic
26: std::rt::lang_start_internal
27: main
query stack during panic:
end of query stack
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0432`.
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: rustc 1.30.0 (da5f414c2 2018-10-24) running on x86_64-apple-darwin
note: compiler flags: -C debuginfo=2 -C incremental --crate-type bin
note: some of the compiler flags provided by cargo are hidden
Activity
petrochenkov commentedon Oct 29, 2018
Fixed in #55490
Rollup merge of rust-lang#55490 - petrochenkov:resolveice, r=eddyb