Ensure we codegen the main fn

[saethlin]

This needs a test. The best test I've come up with for this scenario is to check that this works with an imported main:

RUSTFLAGS=-Zcross-crate-inline-threshold=yes cargo +stage1 b --release -Zbuild-std --target=x86_64-unknown-linux-gnu

Because that's the most codegen delay that's possible.

[rust-log-analyzer]

The job aarch64-gnu-llvm-19-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[RUSTC-TIMING] wit_component test:false 26.054
   Compiling wasm-component-ld-wrapper v0.1.0 (/checkout/src/tools/wasm-component-ld)

thread 'rustc' panicked at compiler/rustc_monomorphize/src/collector.rs:461:13:
assertion failed: tcx.should_codegen_locally(instance)
stack backtrace:
   0:     0xffcae6020134 - std::backtrace_rs::backtrace::libunwind::trace::hbeb8ff6f1dc1cc87
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
   1:     0xffcae6020134 - std::backtrace_rs::backtrace::trace_unsynchronized::hcbd64546bb0bc534
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
---
   9:     0xffcae6023a18 - std::panicking::default_hook::{{closure}}::haac60c33ad8953eb
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/panicking.rs:300:27
  10:     0xffcae6023874 - std::panicking::default_hook::hfbe61bc0eb59097c
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/panicking.rs:327:9
  11:     0xffcae2602c2c - <alloc[cf75e2ab30ac120f]::boxed::Box<rustc_driver_impl[185ce98be39526fb]::install_ice_hook::{closure#1}> as core[86de0986de23a55d]::ops::function::Fn<(&dyn for<'a, 'b> core[86de0986de23a55d]::ops::function::Fn<(&'a std[57c45f57ec3c24e5]::panic::PanicHookInfo<'b>,), Output = ()> + core[86de0986de23a55d]::marker::Sync + core[86de0986de23a55d]::marker::Send, &std[57c45f57ec3c24e5]::panic::PanicHookInfo)>>::call
  12:     0xffcae602448c - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1caa90323394741e
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/alloc/src/boxed.rs:1980:9
  13:     0xffcae602448c - std::panicking::rust_panic_with_hook::h448ca412e27acd2b
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/panicking.rs:841:13
  14:     0xffcae6024164 - std::panicking::begin_panic_handler::{{closure}}::he6c71f258db522c4
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/panicking.rs:699:13
  15:     0xffcae6020630 - std::sys::backtrace::__rust_end_short_backtrace::hf8d7a4365255b145
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/sys/backtrace.rs:168:18
  16:     0xffcae6023e70 - __rustc[b7e3ce0d707010f2]::rust_begin_unwind
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/panicking.rs:697:5
  17:     0xffcae2532a14 - core::panicking::panic_fmt::h3247d961c5317d14
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/core/src/panicking.rs:75:14
  18:     0xffcae2532a70 - core::panicking::panic::h4ccbadaf2ec212ea
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/core/src/panicking.rs:145:5
  19:     0xffcae331b748 - rustc_monomorphize[e4c91c3dc4c777ea]::collector::collect_items_rec
  20:     0xffcae3312e80 - rustc_monomorphize[e4c91c3dc4c777ea]::collector::collect_items_root
  21:     0xffcae3348814 - <rustc_session[63f005ccee228a55]::session::Session>::time::<(), rustc_monomorphize[e4c91c3dc4c777ea]::collector::collect_crate_mono_items::{closure#1}>
  22:     0xffcae331fcdc - rustc_monomorphize[e4c91c3dc4c777ea]::collector::collect_crate_mono_items
  23:     0xffcae33275e0 - rustc_monomorphize[e4c91c3dc4c777ea]::partitioning::collect_and_partition_mono_items
  24:     0xffcae49227d4 - rustc_query_impl[16f24c59ccefc9f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[16f24c59ccefc9f]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle[664decf610687807]::query::erase::Erased<[u8; 40usize]>>
  25:     0xffcae4862f9c - <rustc_query_impl[16f24c59ccefc9f]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2} as core[86de0986de23a55d]::ops::function::FnOnce<(rustc_middle[664decf610687807]::ty::context::TyCtxt, ())>>::call_once
  26:     0xffcae48b0e2c - <std[57c45f57ec3c24e5]::thread::local::LocalKey<core[86de0986de23a55d]::cell::Cell<*const ()>>>::with::<rustc_middle[664decf610687807]::ty::context::tls::enter_context<rustc_query_system[d3c07d0e50d3676a]::query::plumbing::try_load_from_disk_and_cache_in_memory<rustc_query_impl[16f24c59ccefc9f]::DynamicConfig<rustc_query_system[d3c07d0e50d3676a]::query::caches::SingleCache<rustc_middle[664decf610687807]::query::erase::Erased<[u8; 40usize]>>, false, false, false>, rustc_query_impl[16f24c59ccefc9f]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[664decf610687807]::query::erase::Erased<[u8; 40usize]>>::{closure#0}, rustc_middle[664decf610687807]::query::erase::Erased<[u8; 40usize]>>
  27:     0xffcae477629c - rustc_query_system[d3c07d0e50d3676a]::query::plumbing::try_execute_query::<rustc_query_impl[16f24c59ccefc9f]::DynamicConfig<rustc_query_system[d3c07d0e50d3676a]::query::caches::SingleCache<rustc_middle[664decf610687807]::query::erase::Erased<[u8; 40usize]>>, false, false, false>, rustc_query_impl[16f24c59ccefc9f]::plumbing::QueryCtxt, false>
  28:     0xffcae49caa48 - rustc_query_impl[16f24c59ccefc9f]::query_impl::collect_and_partition_mono_items::get_query_non_incr::__rust_end_short_backtrace
  29:     0xffcae2a593cc - rustc_codegen_ssa[e8c5c9b2d300fbe6]::base::codegen_crate::<rustc_codegen_llvm[d168fe60faae7a23]::LlvmCodegenBackend>
  30:     0xffcae29a4d18 - <rustc_codegen_llvm[d168fe60faae7a23]::LlvmCodegenBackend as rustc_codegen_ssa[e8c5c9b2d300fbe6]::traits::backend::CodegenBackend>::codegen_crate
  31:     0xffcae28288c8 - <rustc_session[63f005ccee228a55]::session::Session>::time::<alloc[cf75e2ab30ac120f]::boxed::Box<dyn core[86de0986de23a55d]::any::Any>, rustc_interface[96f7d59b305183f1]::passes::start_codegen::{closure#0}>
  32:     0xffcae28ef054 - rustc_interface[96f7d59b305183f1]::passes::start_codegen
  33:     0xffcae283f118 - <rustc_interface[96f7d59b305183f1]::queries::Linker>::codegen_and_build_linker
  34:     0xffcae260b580 - <std[57c45f57ec3c24e5]::thread::local::LocalKey<core[86de0986de23a55d]::cell::Cell<*const ()>>>::with::<rustc_middle[664decf610687807]::ty::context::tls::enter_context<<rustc_middle[664decf610687807]::ty::context::GlobalCtxt>::enter<rustc_interface[96f7d59b305183f1]::passes::create_and_enter_global_ctxt<core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>>::{closure#1}, core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>>::{closure#0}, core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>>
  35:     0xffcae25a9990 - <rustc_middle[664decf610687807]::ty::context::TyCtxt>::create_global_ctxt::<core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>, rustc_interface[96f7d59b305183f1]::passes::create_and_enter_global_ctxt<core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
  36:     0xffcae25e2a04 - <rustc_interface[96f7d59b305183f1]::passes::create_and_enter_global_ctxt<core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[86de0986de23a55d]::ops::function::FnOnce<(&rustc_session[63f005ccee228a55]::session::Session, rustc_middle[664decf610687807]::ty::context::CurrentGcx, alloc[cf75e2ab30ac120f]::sync::Arc<rustc_data_structures[b20d5a92cde4f84d]::jobserver::Proxy>, &std[57c45f57ec3c24e5]::sync::once_lock::OnceLock<rustc_middle[664decf610687807]::ty::context::GlobalCtxt>, &rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_middle[664decf610687807]::arena::Arena>, &rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_hir[e506d71a89761aaf]::Arena>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  37:     0xffcae26029f4 - <alloc[cf75e2ab30ac120f]::boxed::Box<dyn for<'a> core[86de0986de23a55d]::ops::function::FnOnce<(&'a rustc_session[63f005ccee228a55]::session::Session, rustc_middle[664decf610687807]::ty::context::CurrentGcx, alloc[cf75e2ab30ac120f]::sync::Arc<rustc_data_structures[b20d5a92cde4f84d]::jobserver::Proxy>, &'a std[57c45f57ec3c24e5]::sync::once_lock::OnceLock<rustc_middle[664decf610687807]::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_middle[664decf610687807]::arena::Arena<'a>>, &'a rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_hir[e506d71a89761aaf]::Arena<'a>>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2}), Output = core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>>> as core[86de0986de23a55d]::ops::function::FnOnce<(&rustc_session[63f005ccee228a55]::session::Session, rustc_middle[664decf610687807]::ty::context::CurrentGcx, alloc[cf75e2ab30ac120f]::sync::Arc<rustc_data_structures[b20d5a92cde4f84d]::jobserver::Proxy>, &std[57c45f57ec3c24e5]::sync::once_lock::OnceLock<rustc_middle[664decf610687807]::ty::context::GlobalCtxt>, &rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_middle[664decf610687807]::arena::Arena>, &rustc_data_structures[b20d5a92cde4f84d]::sync::worker_local::WorkerLocal<rustc_hir[e506d71a89761aaf]::Arena>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2})>>::call_once
  38:     0xffcae25e17c4 - rustc_interface[96f7d59b305183f1]::passes::create_and_enter_global_ctxt::<core[86de0986de23a55d]::option::Option<rustc_interface[96f7d59b305183f1]::queries::Linker>, rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}::{closure#2}>
  39:     0xffcae2579070 - rustc_span[7537e615742d9f85]::create_session_globals_then::<(), rustc_interface[96f7d59b305183f1]::util::run_in_thread_with_globals<rustc_interface[96f7d59b305183f1]::util::run_in_thread_pool_with_globals<rustc_interface[96f7d59b305183f1]::interface::run_compiler<(), rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
  40:     0xffcae25e9bf8 - std[57c45f57ec3c24e5]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[96f7d59b305183f1]::util::run_in_thread_with_globals<rustc_interface[96f7d59b305183f1]::util::run_in_thread_pool_with_globals<rustc_interface[96f7d59b305183f1]::interface::run_compiler<(), rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  41:     0xffcae2584368 - <<std[57c45f57ec3c24e5]::thread::Builder>::spawn_unchecked_<rustc_interface[96f7d59b305183f1]::util::run_in_thread_with_globals<rustc_interface[96f7d59b305183f1]::util::run_in_thread_pool_with_globals<rustc_interface[96f7d59b305183f1]::interface::run_compiler<(), rustc_driver_impl[185ce98be39526fb]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[86de0986de23a55d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  42:     0xffcae602840c - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4301b1eb7e190497
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/alloc/src/boxed.rs:1966:9
  43:     0xffcae602840c - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h63c57e2bd87c106a
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/alloc/src/boxed.rs:1966:9
  44:     0xffcae602840c - std::sys::pal::unix::thread::Thread::new::thread_start::h029a7b8769f51646
                               at /rustc/390a0ab5dc4a895235a551e502c3893c3337731d/library/std/src/sys/pal/unix/thread.rs:97:17
  45:     0xffcae1844b30 - <unknown>
  46:     0xffcae18ad88c - <unknown>
---
warning: the ICE couldn't be written to `/checkout/rustc-ice-2025-07-17T23_29_35-26248.txt`: Read-only file system (os error 30)

note: rustc 1.90.0-nightly (f7dea7753 2025-07-17) running on aarch64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C opt-level=3 -C embed-bitcode=no -C debug-assertions=on -C strip=symbols -C symbol-mangling-version=v0 -Z randomize-layout -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C llvm-args=-import-instr-limit=10 -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -Z unstable-options -Z binary-dep-depinfo -Z on-broken-pipe=kill -Z tls-model=initial-exec -Z allow-features=binary-dep-depinfo,proc_macro_span,proc_macro_span_shrink,proc_macro_diagnostic,min_specialization

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
[RUSTC-TIMING] wasm_component_ld test:false 0.080
error: could not compile `wasm-component-ld-wrapper` (bin "wasm-component-ld")

Caused by:
  process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc /checkout/obj/build/bootstrap/debug/rustc --crate-name wasm_component_ld --edition=2021 src/tools/wasm-component-ld/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no -C debug-assertions=on --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=61696ef4436a610f -C extra-filename=-fa6b6db12879c1a3 --out-dir /checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools/aarch64-unknown-linux-gnu/release/deps --target aarch64-unknown-linux-gnu -C strip=symbols -L dependency=/checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools/aarch64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools/release/deps --extern wasm_component_ld=/checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools/aarch64-unknown-linux-gnu/release/deps/libwasm_component_ld-efe28b099532ea21.rlib -Csymbol-mangling-version=v0 -Zrandomize-layout -Zunstable-options '--check-cfg=cfg(bootstrap)' '--check-cfg=cfg(rust_analyzer)' -Zmacro-backtrace -Csplit-debuginfo=off -Cllvm-args=-import-instr-limit=10 -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Zunstable-options -Z binary-dep-depinfo` (exit status: 101)
Build completed unsuccessfully in 0:24:21
  local time: Thu Jul 17 23:29:35 UTC 2025
  network time: Thu, 17 Jul 2025 23:29:35 GMT
##[error]Process completed with exit code 1.
Post job cleanup.