[INFO] fetching crate memfd-exec 0.2.1... [INFO] checking memfd-exec-0.2.1 against try#66388cc165a6c4ac98c074dc9f0281ff23528c55 for pr-150727 [INFO] extracting crate memfd-exec 0.2.1 into /workspace/builds/worker-4-tc2/source [INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml [INFO] started tweaking crates.io crate memfd-exec 0.2.1 [INFO] finished tweaking crates.io crate memfd-exec 0.2.1 [INFO] tweaked toml for crates.io crate memfd-exec 0.2.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate memfd-exec 0.2.1 on toolchain 66388cc165a6c4ac98c074dc9f0281ff23528c55 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 171 packages to latest compatible versions [INFO] [stderr] Adding nix v0.26.4 (available: v0.30.1) [INFO] [stderr] Adding reqwest v0.11.27 (available: v0.13.1) [INFO] [stderr] Adding serial_test v2.0.0 (available: v3.3.1) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] de6ea789d1db0d8dfea111ec781846fac89fd67743b03d1c8e1b25333bf380fa [INFO] running `Command { std: "docker" "start" "-a" "de6ea789d1db0d8dfea111ec781846fac89fd67743b03d1c8e1b25333bf380fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "de6ea789d1db0d8dfea111ec781846fac89fd67743b03d1c8e1b25333bf380fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "de6ea789d1db0d8dfea111ec781846fac89fd67743b03d1c8e1b25333bf380fa", kill_on_drop: false }` [INFO] [stdout] de6ea789d1db0d8dfea111ec781846fac89fd67743b03d1c8e1b25333bf380fa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9e225ae0ea852ba01d6f0c8b2a99664ebb933b017883a4d628f33ce50e520bfd [INFO] running `Command { std: "docker" "start" "-a" "9e225ae0ea852ba01d6f0c8b2a99664ebb933b017883a4d628f33ce50e520bfd", kill_on_drop: false }` [INFO] [stderr] Compiling memoffset v0.7.1 [INFO] [stderr] Checking tokio v1.49.0 [INFO] [stderr] Checking openssl-sys v0.9.111 [INFO] [stderr] Checking parking_lot_core v0.9.12 [INFO] [stderr] Compiling serial_test_derive v2.0.0 [INFO] [stderr] Checking serde_urlencoded v0.7.1 [INFO] [stderr] Checking url v2.5.8 [INFO] [stderr] Checking dashmap v5.5.3 [INFO] [stderr] Checking parking_lot v0.12.5 [INFO] [stderr] Checking nix v0.26.4 [INFO] [stderr] Checking serial_test v2.0.0 [INFO] [stderr] Checking openssl v0.10.75 [INFO] [stderr] Checking memfd-exec v0.2.1 (/opt/rustwide/workdir) [INFO] [stderr] Checking tokio-util v0.7.18 [INFO] [stdout] warning: irrefutable `if let` pattern [INFO] [stdout] --> src/executable.rs:571:12 [INFO] [stdout] | [INFO] [stdout] 571 | if let Err(err) = fexecve(mfd, &argv, &envp) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the `if let` is useless [INFO] [stdout] = help: consider replacing the `if let` with a `let` [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CommandEnvs` is never constructed [INFO] [stdout] --> src/command_env.rs:83:12 [INFO] [stdout] | [INFO] [stdout] 83 | pub struct CommandEnvs<'a> { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking h2 v0.3.27 [INFO] [stderr] Checking native-tls v0.2.14 [INFO] [stderr] Checking tokio-native-tls v0.3.1 [INFO] [stderr] Checking hyper v0.14.32 [INFO] [stderr] Checking hyper-tls v0.5.0 [INFO] [stderr] Checking reqwest v0.11.27 [INFO] [stderr] [INFO] [stderr] thread 'rustc' (191) panicked at /rustc-dev/66388cc165a6c4ac98c074dc9f0281ff23528c55/compiler/rustc_ast/src/attr/mod.rs:302:36: [INFO] [stderr] attribute is missing tokens: Attribute { kind: Normal(NormalAttr { item: AttrItem { unsafety: Default, path: Path { span: tests/test_basic.rs:129:1: 129:8 (#23), segments: [PathSegment { ident: #23, id: NodeId(4294967040), args: None }], tokens: None }, args: Unparsed(Empty), tokens: None }, tokens: None }), id: AttrId(29), style: Outer, span: tests/test_basic.rs:129:1: 129:8 (#23) } [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x724db1a2bfa3 - <::print::DisplayBacktrace as core[75ca2badb63c4514]::fmt::Display>::fmt [INFO] [stderr] 1: 0x724db200fb48 - core[75ca2badb63c4514]::fmt::write [INFO] [stderr] 2: 0x724db1a42226 - ::write_fmt [INFO] [stderr] 3: 0x724db1a01b98 - std[7d609349af90bec6]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x724db1a1f833 - std[7d609349af90bec6]::panicking::default_hook [INFO] [stderr] 5: 0x724db0a0236a - std[7d609349af90bec6]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x724db1a1fb12 - std[7d609349af90bec6]::panicking::panic_with_hook [INFO] [stderr] 7: 0x724db1a01c58 - std[7d609349af90bec6]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x724db19f89a9 - std[7d609349af90bec6]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x724db1a0372d - __rustc[69841a6cbc58d81d]::rust_begin_unwind [INFO] [stderr] 10: 0x724dae638f9c - core[75ca2badb63c4514]::panicking::panic_fmt [INFO] [stderr] 11: 0x724db2de0110 - ::token_trees [INFO] [stderr] 12: 0x724db361c314 - ::fully_expand_fragment [INFO] [stderr] 13: 0x724db35e65d2 - ::expand_crate [INFO] [stderr] 14: 0x724db26f0af3 - rustc_interface[903e43df8d6bd657]::passes::configure_and_expand [INFO] [stderr] 15: 0x724db3207658 - rustc_interface[903e43df8d6bd657]::passes::resolver_for_lowering_raw [INFO] [stderr] 16: 0x724db32073cd - rustc_query_impl[8c5349e00d64015e]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 17: 0x724db32073a7 - >::call_once [INFO] [stderr] 18: 0x724db31ecb5f - rustc_query_system[d45be4fb383a0235]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[8c5349e00d64015e]::plumbing::QueryCtxt, false> [INFO] [stderr] 19: 0x724db31ec6bc - rustc_query_impl[8c5349e00d64015e]::query_impl::resolver_for_lowering_raw::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 20: 0x724db337127b - , rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[75ca2badb63c4514]::ops::function::FnOnce<(&rustc_session[1e6875ba352dc1ba]::session::Session, rustc_middle[2342951a64deba5]::ty::context::CurrentGcx, alloc[d7482eb0f1d19161]::sync::Arc, &std[7d609349af90bec6]::sync::once_lock::OnceLock, &rustc_data_structures[c82a87ce5cdbfc92]::sync::worker_local::WorkerLocal, &rustc_data_structures[c82a87ce5cdbfc92]::sync::worker_local::WorkerLocal, rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0} [INFO] [stderr] 21: 0x724db325ac98 - rustc_interface[903e43df8d6bd657]::interface::run_compiler::<(), rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}>::{closure#1} [INFO] [stderr] 22: 0x724db30eac4e - std[7d609349af90bec6]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 23: 0x724db30eaa20 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[75ca2badb63c4514]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 24: 0x724db30ed138 - ::new::thread_start [INFO] [stderr] 25: 0x724dacc8aaa4 - [INFO] [stderr] 26: 0x724dacd17a64 - clone [INFO] [stderr] 27: 0x0 - [INFO] [stderr] [INFO] [stderr] error: 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: please make sure that you have updated to the latest nightly [INFO] [stderr] [INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/workdir/rustc-ice-2026-01-08T20_29_11-188.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.94.0-nightly (66388cc16 2026-01-08) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 [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 [resolver_for_lowering_raw] getting the resolver for lowering [INFO] [stderr] end of query stack [INFO] [stderr] error: could not compile `memfd-exec` (test "test_basic") [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/66388cc165a6c4ac98c074dc9f0281ff23528c55/bin/rustc --crate-name test_basic --edition=2021 tests/test_basic.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=e616a91d31638e70 -C extra-filename=-0e5781c1a141d660 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-b78d6451d033f8d4.rmeta --extern memfd_exec=/opt/rustwide/target/debug/deps/libmemfd_exec-127ee9825f09c53e.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-42a8a616740c362f.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-fa3bee55e1859415.rmeta --extern serial_test=/opt/rustwide/target/debug/deps/libserial_test-111f1db96a2801cd.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-c88721dac971603f.rmeta --cap-lints=forbid` (exit status: 101) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: irrefutable `if let` pattern [INFO] [stdout] --> src/executable.rs:571:12 [INFO] [stdout] | [INFO] [stdout] 571 | if let Err(err) = fexecve(mfd, &argv, &envp) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the `if let` is useless [INFO] [stdout] = help: consider replacing the `if let` with a `let` [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CommandEnvs` is never constructed [INFO] [stdout] --> src/command_env.rs:83:12 [INFO] [stdout] | [INFO] [stdout] 83 | pub struct CommandEnvs<'a> { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "9e225ae0ea852ba01d6f0c8b2a99664ebb933b017883a4d628f33ce50e520bfd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9e225ae0ea852ba01d6f0c8b2a99664ebb933b017883a4d628f33ce50e520bfd", kill_on_drop: false }` [INFO] [stdout] 9e225ae0ea852ba01d6f0c8b2a99664ebb933b017883a4d628f33ce50e520bfd