Closed
Description
Code
in library:
#[lang = "start"]
extern "C" fn start(main: fn(), _argc: isize, _argv: *const *const u8) -> isize {
main();
0
} in no_std binary:
fn main() {
...
}This goes away if I turn on #![no_main] in the binary and annotate main with #[no_mangle].
Meta
rustc --version --verbose:
binary: rustc
commit-hash: f455e46eae1a227d735091091144601b467e1565
commit-date: 2020-06-20
host: x86_64-unknown-linux-gnu
release: 1.46.0-nightly
LLVM version: 10.0
Error output
Compiling rust-example v0.1.0 (/home/ben/workspace/nrf-test/rust-example)
error: internal compiler error: src/librustc_metadata/rmeta/decoder.rs:1106:17: get_optimized_mir: missing MIR for `DefId(4:22 ~ nrf52_sys[e357]::start[0])`
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:916:9
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1076
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1537
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:198
9: std::panicking::default_hook
at src/libstd/panicking.rs:217
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:477
12: std::panicking::begin_panic
13: rustc_errors::HandlerInner::bug
14: rustc_errors::Handler::bug
15: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
16: rustc_middle::ty::context::tls::with_opt::{{closure}}
17: rustc_middle::ty::context::tls::with_opt
18: rustc_middle::util::bug::opt_span_bug_fmt
19: rustc_middle::util::bug::bug_fmt
20: rustc_metadata::rmeta::decoder::<impl rustc_metadata::creader::CrateMetadataRef>::get_optimized_mir::{{closure}}
21: rustc_metadata::rmeta::decoder::<impl rustc_metadata::creader::CrateMetadataRef>::get_optimized_mir
22: rustc_metadata::rmeta::decoder::cstore_impl::provide_extern::optimized_mir
23: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::optimized_mir>::compute
24: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
25: rustc_data_structures::stack::ensure_sufficient_stack
26: rustc_query_system::query::plumbing::get_query_impl
27: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
28: rustc_mir::monomorphize::collector::collect_neighbours
29: rustc_data_structures::stack::ensure_sufficient_stack
30: rustc_mir::monomorphize::collector::collect_items_rec
31: rustc_mir::monomorphize::collector::collect_crate_mono_items
32: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
33: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::collect_and_partition_mono_items>::compute
34: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
35: rustc_data_structures::stack::ensure_sufficient_stack
36: rustc_query_system::query::plumbing::get_query_impl
37: rustc_codegen_ssa::base::codegen_crate
38: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
39: rustc_interface::passes::start_codegen
40: rustc_middle::ty::context::tls::enter_global
41: rustc_interface::queries::Queries::ongoing_codegen
42: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
43: rustc_span::with_source_map
44: rustc_interface::interface::run_compiler_in_existing_thread_pool
45: scoped_tls::ScopedKey<T>::set
46: rustc_ast::attr::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
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 1.46.0-nightly (f455e46ea 2020-06-20) running on x86_64-unknown-linux-gnu
note: compiler flags: -C panic=abort -C embed-bitcode=no -C debuginfo=2 -C linker=arm-none-eabi-gcc -C link-arg=-mthumb -C link-arg=-Tnrf52.ld -C link-arg=-mcpu=cortex-m4 -C link-arg=--specs=nano.specs -C link-arg=-Wl,--gc-sections -C link-arg=-Wl,--start-group -C link-arg=-Wl,--end-group -C link-arg=-Wl,--build-id=none -C link-arg=-mabi=aapcs -C link-arg=-mfloat-abi=hard -C link-arg=-mfpu=fpv4-sp-d16 --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [optimized_mir] optimizing MIR for `nrf52_sys::start`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack