ICE: compiler/rustc_monomorphize/src/collector.rs:1038:9: no MIR available

[y21]

Code

Haven't been able to minimize it yet, but it can be reproduced by creating a new cargo project, adding matrix-sdk = "0.6.2" to the dependencies and compiling it with nightly rustc 2023-05-06

Edit: Minimized test case: #111320 (comment)

Meta

rustc --version --verbose:

rustc 1.71.0-nightly (a77c55248 2023-05-06)
binary: rustc
commit-hash: a77c552485a19245a266bc03c450676c666b605f
commit-date: 2023-05-06
host: x86_64-unknown-linux-gnu
release: 1.71.0-nightly
LLVM version: 16.0.2

Error output

error: internal compiler error: compiler/rustc_monomorphize/src/collector.rs:1038:9: no MIR available for DefId(88:2950 ~ matrix_sdk_crypto[84c8]::types::{impl#12}::algorithm)

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/a77c552485a19245a266bc03c450676c666b605f/compiler/rustc_errors/src/lib.rs:1650:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (a77c55248 2023-05-06) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

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
#1 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
error: internal compiler error: compiler/rustc_monomorphize/src/collector.rs:1038:9: no MIR available for DefId(88:2952 ~ matrix_sdk_crypto[84c8]::types::{impl#13}::algorithm)

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/a77c552485a19245a266bc03c450676c666b605f/compiler/rustc_errors/src/lib.rs:1650:9

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (a77c55248 2023-05-06) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

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
#1 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
thread 'rustc' panicked at 'Box<dyn Any>', /rustc/a77c552485a19245a266bc03c450676c666b605f/compiler/rustc_errors/src/lib.rs:1650:9

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.71.0-nightly (a77c55248 2023-05-06) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2

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
#1 [exported_symbols] collecting exported symbols for crate `0`
end of query stack
error: could not compile `matrix-sdk-sled` (lib)

Backtrace

stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: <rustc_errors::HandlerInner>::bug::<alloc::string::String>
   2: <rustc_errors::Handler>::bug::<alloc::string::String>
   3: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>::{closure#0}
   4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}
   5: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_opt<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
   6: rustc_middle::util::bug::bug_fmt
   7: rustc_monomorphize::collector::collect_neighbours
   8: rustc_monomorphize::collector::collect_items_rec
   9: rustc_monomorphize::collector::collect_items_rec
  10: rustc_monomorphize::collector::collect_items_rec
  11: rustc_monomorphize::collector::collect_items_rec
  12: rustc_monomorphize::collector::collect_items_rec
  13: rustc_monomorphize::collector::collect_items_rec
  14: rustc_monomorphize::collector::collect_items_rec
  15: rustc_monomorphize::collector::collect_items_rec
  16: rustc_monomorphize::collector::collect_items_rec
  17: rustc_monomorphize::collector::collect_items_rec
  18: rustc_monomorphize::collector::collect_items_rec
  19: rustc_monomorphize::collector::collect_items_rec
  20: rustc_monomorphize::collector::collect_items_rec
  21: rustc_monomorphize::collector::collect_items_rec
  22: rustc_monomorphize::collector::collect_items_rec
  23: rustc_monomorphize::collector::collect_items_rec
  24: rustc_monomorphize::collector::collect_items_rec
  25: rustc_monomorphize::collector::collect_items_rec
  26: rustc_monomorphize::collector::collect_items_rec
  27: rustc_monomorphize::collector::collect_items_rec
  28: rustc_monomorphize::collector::collect_items_rec
  29: rustc_monomorphize::collector::collect_items_rec
  30: rustc_monomorphize::collector::collect_items_rec
  31: rustc_monomorphize::collector::collect_items_rec
  32: rustc_monomorphize::collector::collect_items_rec
  33: rustc_monomorphize::collector::collect_items_rec
  34: rustc_monomorphize::collector::collect_items_rec
  35: rustc_monomorphize::collector::collect_items_rec
  36: rustc_monomorphize::collector::collect_items_rec
  37: rustc_monomorphize::collector::collect_items_rec
  38: rustc_monomorphize::collector::collect_items_rec
  39: rustc_monomorphize::collector::collect_items_rec
  40: rustc_monomorphize::collector::collect_items_rec
  41: rustc_monomorphize::collector::collect_items_rec
  42: rustc_monomorphize::collector::collect_items_rec
  43: rustc_monomorphize::collector::collect_items_rec
  44: rustc_monomorphize::collector::collect_items_rec
  45: rustc_monomorphize::collector::collect_items_rec
  46: rustc_monomorphize::collector::collect_items_rec
  47: rustc_monomorphize::collector::collect_items_rec
  48: rustc_monomorphize::collector::collect_items_rec
  49: rustc_monomorphize::collector::collect_items_rec
  50: rustc_monomorphize::collector::collect_items_rec
  51: rustc_monomorphize::collector::collect_items_rec
  52: rustc_monomorphize::collector::collect_items_rec
  53: rustc_monomorphize::collector::collect_items_rec
  54: rustc_monomorphize::collector::collect_items_rec
  55: rustc_monomorphize::collector::collect_items_rec
  56: rustc_monomorphize::collector::collect_items_rec
  57: rustc_monomorphize::collector::collect_items_rec
  58: rustc_monomorphize::collector::collect_items_rec
  59: rustc_monomorphize::collector::collect_items_rec
  60: rustc_monomorphize::collector::collect_items_rec
  61: rustc_monomorphize::collector::collect_items_rec
  62: rustc_monomorphize::collector::collect_items_rec
  63: <rustc_session::session::Session>::time::<(), rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}>
  64: rustc_monomorphize::collector::collect_crate_mono_items
  65: rustc_monomorphize::partitioning::collect_and_partition_mono_items
  66: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::collect_and_partition_mono_items, rustc_query_impl::plumbing::QueryCtxt>
  67: rustc_query_impl::get_query::collect_and_partition_mono_items
  68: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
  69: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::exported_symbols, rustc_query_impl::plumbing::QueryCtxt>
  70: rustc_query_impl::get_query::exported_symbols
  71: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
  72: rustc_metadata::rmeta::encoder::encode_metadata_impl
  73: rustc_metadata::rmeta::encoder::encode_metadata
  74: rustc_metadata::fs::encode_and_write_metadata
  75: rustc_interface::passes::start_codegen
  76: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
  77: <rustc_interface::queries::Queries>::ongoing_codegen
  78: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
  79: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>

[lukas-code]

searched nightlies: from nightly-2023-05-05 to nightly-2023-05-07
regressed nightly: nightly-2023-05-07
searched commit range: f9a6b71...a77c552
regressed commit: 31a4f2d

bisected with cargo-bisect-rustc v0.6.6

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --regress=ice -- build 

cc #110907 @Bryanskiy @petrochenkov

[lukas-code]

reduced:

// crate a
trait PrivTrait {
    fn priv_fn(&self);
}

pub struct ImplPrivTrait;

impl PrivTrait for ImplPrivTrait {
    fn priv_fn(&self) {}
}

pub struct Wrapper<T>(T);

pub trait PubTrait {
    fn pub_fn(&self);
}

impl<T: PrivTrait> PubTrait for Wrapper<T> {
    fn pub_fn(&self) {
        self.0.priv_fn()
    }
}

// crate b
use a::{Wrapper, ImplPrivTrait, PubTrait};

pub fn foo(x: Wrapper<ImplPrivTrait>) {
    x.pub_fn();
}

run cargo build

[Jules-Bertholet]

@rustbot label regression-from-stable-to-nightly

[genusistimelord]

yeah having issues with nightly and wgpu as will with this exact error. I wonder what changes caused this issue.

[lukas-code]

@genusistimelord This is caused by #110907, which is getting reverted in #111371. So if all goes well (and the github outage gets resolved soon) this should be fixed in tomorrow's nightly.