[INFO] fetching crate ouroboros_examples 0.8.3... [INFO] checking ouroboros_examples-0.8.3 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744 [INFO] extracting crate ouroboros_examples 0.8.3 into /workspace/builds/worker-4/source [INFO] validating manifest of crates.io crate ouroboros_examples 0.8.3 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate ouroboros_examples 0.8.3 [INFO] finished tweaking crates.io crate ouroboros_examples 0.8.3 [INFO] tweaked toml for crates.io crate ouroboros_examples 0.8.3 written to /workspace/builds/worker-4/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 560624b47317b836d7a8b96027716a7391da6f13aeadd43019419c092f0c29bc [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "560624b47317b836d7a8b96027716a7391da6f13aeadd43019419c092f0c29bc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "560624b47317b836d7a8b96027716a7391da6f13aeadd43019419c092f0c29bc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "560624b47317b836d7a8b96027716a7391da6f13aeadd43019419c092f0c29bc", kill_on_drop: false }` [INFO] [stdout] 560624b47317b836d7a8b96027716a7391da6f13aeadd43019419c092f0c29bc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 898bd0882ba63559846595c74a4609cfdc1f1b156263b4b82629d4a4c84e97ed [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "898bd0882ba63559846595c74a4609cfdc1f1b156263b4b82629d4a4c84e97ed", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.26 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.69 [INFO] [stderr] Compiling version_check v0.9.3 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling serde_derive v1.0.125 [INFO] [stderr] Compiling regex-syntax v0.6.23 [INFO] [stderr] Compiling lazy_static v1.4.0 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Checking stable_deref_trait v1.2.0 [INFO] [stderr] Compiling trybuild v1.0.42 [INFO] [stderr] Checking glob v0.3.0 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [INFO] [stderr] Compiling tokio v1.5.0 [INFO] [stderr] Compiling aho-corasick v0.7.15 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Compiling regex v1.4.5 [INFO] [stderr] Compiling Inflector v0.11.4 [INFO] [stderr] Compiling ouroboros_macro v0.8.3 [INFO] [stderr] Compiling tokio-macros v1.1.0 [INFO] [stderr] Checking ouroboros v0.8.3 [INFO] [stderr] Checking ouroboros_examples v0.8.3 (/opt/rustwide/workdir) [INFO] [stdout] warning: field is never read: `data_ref` [INFO] [stdout] --> src/lib.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | data_ref: &'this i32, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> src/lib.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | data: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `c` [INFO] [stdout] --> src/lib.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | c: Rc<&'this i32>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `b` [INFO] [stdout] --> src/lib.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | b: Arc<&'this i32>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `a` [INFO] [stdout] --> src/lib.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | a: Box, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `float_reference` [INFO] [stdout] --> src/lib.rs:37:5 [INFO] [stdout] | [INFO] [stdout] 37 | float_reference: &'this mut f32, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `int_reference` [INFO] [stdout] --> src/lib.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 35 | int_reference: &'this i32, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `float_data` [INFO] [stdout] --> src/lib.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | float_data: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `int_data` [INFO] [stdout] --> src/lib.rs:32:5 [INFO] [stdout] | [INFO] [stdout] 32 | int_data: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data_ref` [INFO] [stdout] --> src/lib.rs:46:5 [INFO] [stdout] | [INFO] [stdout] 46 | data_ref: &'this i32, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> src/lib.rs:44:5 [INFO] [stdout] | [INFO] [stdout] 44 | data: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] thread 'rustc' panicked at 'Box', /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/panic.rs:59:5 [INFO] [stdout] error: internal compiler error: compiler/rustc_mir/src/transform/generator.rs:751:13: Broken MIR: generator contains type Pin>> in MIR, but typeck only knows about for<'r, 's, 't0> {ResumeTy, Box, impl for<'this> ::core::ops::FnOnce(&'this as [INFO] [stdout] ::core::ops::Deref>::Target) [INFO] [stdout] -> [INFO] [stdout] ::std::pin::Pin<::std::boxed::Box + [INFO] [stdout] 'this>>, MaybeUninit, &'r i32, Pin + 't0)>>, ()} [INFO] [stdout] --> src/lib.rs:8:1 [INFO] [stdout] | [INFO] [stdout] 8 | #[self_referencing] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this error: internal compiler error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7fa6603c1dd0 - std::backtrace_rs::backtrace::libunwind::trace::hec7eaac9435d3512 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5 [INFO] [stderr] 1: 0x7fa6603c1dd0 - std::backtrace_rs::backtrace::trace_unsynchronized::h42791b8fa12b7daa [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x7fa6603c1dd0 - std::sys_common::backtrace::_print_fmt::h3da3ebe04fb665a8 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x7fa6603c1dd0 - ::fmt::he40bcdde3c4491cd [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/sys_common/backtrace.rs:46:22 [INFO] [stderr] 4: 0x7fa66043306f - core::fmt::write::h2c729149c08098ab [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/core/src/fmt/mod.rs:1094:17 [INFO] [stderr] 5: 0x7fa6603b6865 - std::io::Write::write_fmt::h28e0f2f58b8d7b7e [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/io/mod.rs:1578:15 [INFO] [stderr] 6: 0x7fa6603c59bb - std::sys_common::backtrace::_print::h7f0223b1e3d898fc [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x7fa6603c59bb - std::sys_common::backtrace::print::h58edd634a14c2d4c [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x7fa6603c59bb - std::panicking::default_hook::{{closure}}::h71657a7591430164 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/panicking.rs:208:50 [INFO] [stderr] 9: 0x7fa6603c549d - std::panicking::default_hook::hcdf4eb5db072c85b [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/panicking.rs:225:9 [INFO] [stderr] 10: 0x7fa660b82fed - rustc_driver::report_ice::hc702a08d9fb7377c [INFO] [stderr] 11: 0x7fa6520ee623 - as core::ops::function::Fn>::call::h3118c3ce6f017537 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/alloc/src/boxed.rs:1560:9 [INFO] [stderr] 12: 0x7fa6521042f6 - proc_macro::bridge::client::::enter::{{closure}}::{{closure}}::h2a4decc39bf7d09a [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/proc_macro/src/bridge/client.rs:320:21 [INFO] [stderr] 13: 0x7fa6603c60d0 - std::panicking::rust_panic_with_hook::hfb91e961ffb5b8e0 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/panicking.rs:595:17 [INFO] [stderr] 14: 0x7fa6614af8ce - std::panicking::begin_panic::{{closure}}::h24a38702b45ac0f3 [INFO] [stderr] 15: 0x7fa6614af609 - std::sys_common::backtrace::__rust_end_short_backtrace::h02cc30df948cb652 [INFO] [stderr] 16: 0x7fa6614af822 - std::panicking::begin_panic::h4dd79645ccae3b6e [INFO] [stderr] 17: 0x7fa66143f0c0 - std::panic::panic_any::hb6abb086932facc4 [INFO] [stderr] 18: 0x7fa66143a215 - rustc_errors::HandlerInner::span_bug::hd47e97195754211a [INFO] [stderr] 19: 0x7fa66143a623 - rustc_errors::Handler::span_bug::ha07d3f2efbc4b3d3 [INFO] [stderr] 20: 0x7fa6613dd88b - rustc_middle::ty::context::tls::with_opt::h41357ac587925078 [INFO] [stderr] 21: 0x7fa6613de1c0 - rustc_middle::util::bug::opt_span_bug_fmt::hdf5251129308f472 [INFO] [stderr] 22: 0x7fa6613de18c - rustc_middle::util::bug::span_bug_fmt::h6df431584eb135c1 [INFO] [stderr] 23: 0x7fa662b990da - ::run_pass::h35fb8f3bebb5fa76 [INFO] [stderr] 24: 0x7fa662160365 - rustc_mir::transform::run_passes::hadd0ed6897143b9e [INFO] [stderr] 25: 0x7fa662bfd20e - rustc_mir::transform::optimized_mir::h39ed0b27b4aefc95 [INFO] [stderr] 26: 0x7fa661f719bf - rustc_query_system::dep_graph::graph::DepGraph::with_task_impl::h39a9f78d160833d0 [INFO] [stderr] 27: 0x7fa661f5351c - rustc_data_structures::stack::ensure_sufficient_stack::h005ce2d6bf554ae7 [INFO] [stderr] 28: 0x7fa661f15b00 - rustc_query_system::query::plumbing::force_query_with_job::h18c0a204e19f48b1 [INFO] [stderr] 29: 0x7fa661ef4031 - rustc_query_system::query::plumbing::get_query_impl::h7b8f88aa3b9abc9b [INFO] [stderr] 30: 0x7fa661f816aa - ::optimized_mir::h18b9538f886a3b69 [INFO] [stderr] 31: 0x7fa662275c1f - rustc_metadata::rmeta::encoder::EncodeContext::encode_crate_root::h6c8fc5ec2eb1aca3 [INFO] [stderr] 32: 0x7fa662c9bff9 - rustc_metadata::rmeta::encoder::encode_metadata_impl::h1e5610af05591ef3 [INFO] [stderr] 33: 0x7fa662cab841 - rustc_data_structures::sync::join::he037a5382f7b2964 [INFO] [stderr] 34: 0x7fa662ca098e - rustc_metadata::rmeta::decoder::cstore_impl::::encode_metadata::h80d669b724ffba8e [INFO] [stderr] 35: 0x7fa662eb73b9 - rustc_middle::ty::context::TyCtxt::encode_metadata::h4f743868421bfc46 [INFO] [stderr] 36: 0x7fa6626307ce - rustc_interface::passes::QueryContext::enter::hcd73d7d93779570e [INFO] [stderr] 37: 0x7fa662639586 - rustc_interface::queries::Queries::ongoing_codegen::h74f3ebc4a4e04394 [INFO] [stderr] 38: 0x7fa6625f4d26 - rustc_interface::queries::::enter::h022bc5d96316a497 [INFO] [stderr] 39: 0x7fa6625f3c74 - rustc_span::with_source_map::h71765ec8b8fd9951 [INFO] [stderr] 40: 0x7fa6625f5cc1 - rustc_interface::interface::create_compiler_and_run::hb7fa0da3b5c16631 [INFO] [stderr] 41: 0x7fa66260f508 - scoped_tls::ScopedKey::set::he6d088ee8831445a [INFO] [stderr] 42: 0x7fa66260fa24 - std::sys_common::backtrace::__rust_begin_short_backtrace::hab4e36ec9faa9780 [INFO] [stderr] 43: 0x7fa662613315 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h32361ced26b14e7a [INFO] [stderr] 44: 0x7fa6603d5fe3 - as core::ops::function::FnOnce>::call_once::h6bc35b6a67165211 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/alloc/src/boxed.rs:1546:9 [INFO] [stderr] 45: 0x7fa6603d5fe3 - as core::ops::function::FnOnce>::call_once::h22a1030555589216 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/alloc/src/boxed.rs:1546:9 [INFO] [stderr] 46: 0x7fa6603d5fe3 - std::sys::unix::thread::Thread::new::thread_start::h729365a01fb88184 [INFO] [stderr] at /rustc/4fa76a4a7742bb9c1febe33019f5a9e7e4839a65/library/std/src/sys/unix/thread.rs:71:17 [INFO] [stderr] 47: 0x7fa6602f2609 - start_thread [INFO] [stderr] 48: 0x7fa660206293 - clone [INFO] [stderr] 49: 0x0 - [INFO] [stderr] [INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug. [INFO] [stderr] [INFO] [stderr] 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 [INFO] [stderr] [INFO] [stderr] note: rustc 1.53.0-nightly (4fa76a4a7 2021-04-02) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 --crate-type lib [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] query stack during panic: [INFO] [stderr] #0 [optimized_mir] optimizing MIR for `ouroboros_impl_box_and_ref::::new_async::{closure#0}` [INFO] [stderr] end of query stack [INFO] [stdout] error: aborting due to previous error; 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `ouroboros_examples` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "898bd0882ba63559846595c74a4609cfdc1f1b156263b4b82629d4a4c84e97ed", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "898bd0882ba63559846595c74a4609cfdc1f1b156263b4b82629d4a4c84e97ed", kill_on_drop: false }` [INFO] [stdout] 898bd0882ba63559846595c74a4609cfdc1f1b156263b4b82629d4a4c84e97ed