[INFO] fetching crate tread 0.4.2...
[INFO] testing tread-0.4.2 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate tread 0.4.2 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate tread 0.4.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tread 0.4.2
[INFO] tweaked toml for crates.io crate tread 0.4.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tread 0.4.2 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tread 0.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d
[INFO] running `Command { std: "docker" "start" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling tread v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: suspicious definition of the runtime `read` symbol used by the standard library
[INFO] [stdout]    --> src/sys/unix.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn read(fd: c_int, buf: *mut u8, count: size_t) -> ssize_t;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(i32, *mut c_void, usize) -> isize` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(i32, *mut u8, usize) -> isize`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "read")]`, or `#[link_name = "read"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: suspicious definition of the runtime `write` symbol used by the standard library
[INFO] [stdout]    --> src/sys/unix.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |     fn write(fd: c_int, buf: *const u8, count: size_t) -> ssize_t;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(i32, *const c_void, usize) -> isize` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(i32, *const u8, usize) -> isize`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "write")]`, or `#[link_name = "write"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 23.34s
[INFO] running `Command { std: "docker" "inspect" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling tread v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: suspicious definition of the runtime `read` symbol used by the standard library
[INFO] [stdout]    --> src/sys/unix.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn read(fd: c_int, buf: *mut u8, count: size_t) -> ssize_t;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(i32, *mut c_void, usize) -> isize` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(i32, *mut u8, usize) -> isize`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "read")]`, or `#[link_name = "read"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: suspicious definition of the runtime `write` symbol used by the standard library
[INFO] [stdout]    --> src/sys/unix.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |     fn write(fd: c_int, buf: *const u8, count: size_t) -> ssize_t;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(i32, *const c_void, usize) -> isize` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(i32, *const u8, usize) -> isize`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "write")]`, or `#[link_name = "write"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tread` (test "golden_files")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.100.0-beta.1-x86_64-unknown-linux-gnu/bin/rustc --crate-name golden_files --edition=2021 tests/golden_files.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --emit=dep-info,link -C opt-level=z -C lto -C codegen-units=1 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=a6682acb29a0b6e8 -C extra-filename=-79c3d11d76f3c9d3 --out-dir /opt/rustwide/target/release/build/tread/79c3d11d76f3c9d3/out -C strip=symbols --cap-lints=warn --force-warn=unused_crate_dependencies` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `tread` (bin "tread" test)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.100.0-beta.1-x86_64-unknown-linux-gnu/bin/rustc --crate-name tread --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --emit=dep-info,link -C opt-level=z -C lto -C codegen-units=1 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=f0c2c79f6db04b12 -C extra-filename=-5b3edc1cab1be03f --out-dir /opt/rustwide/target/release/build/tread/5b3edc1cab1be03f/out -C strip=symbols --cap-lints=warn --force-warn=unused_crate_dependencies` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d", kill_on_drop: false }`
[INFO] [stdout] 4effa96f9e0e3093e63f1c24aab477b64aa8451690550158a9597c6cc9fa522d