[INFO] fetching crate sync-fd 0.1.0...
[INFO] testing sync-fd-0.1.0 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate sync-fd 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate sync-fd 0.1.0
[INFO] finished tweaking crates.io crate sync-fd 0.1.0
[INFO] tweaked toml for crates.io crate sync-fd 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sync-fd 0.1.0 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sync-fd 0.1.0 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3e438d782f1a83955c80b150fd23dda06106d2bbcb2850f27c3970d904fdc32
[INFO] running `Command { std: "docker" "start" "-a" "c3e438d782f1a83955c80b150fd23dda06106d2bbcb2850f27c3970d904fdc32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3e438d782f1a83955c80b150fd23dda06106d2bbcb2850f27c3970d904fdc32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3e438d782f1a83955c80b150fd23dda06106d2bbcb2850f27c3970d904fdc32", kill_on_drop: false }`
[INFO] [stdout] c3e438d782f1a83955c80b150fd23dda06106d2bbcb2850f27c3970d904fdc32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b384cb1ae2c929c4e9cf3680924c1d26e02a738f9d0a09d2c203ba21d1490477
[INFO] running `Command { std: "docker" "start" "-a" "b384cb1ae2c929c4e9cf3680924c1d26e02a738f9d0a09d2c203ba21d1490477", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling sync-fd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `blocking` is never read
[INFO] [stdout]   --> src/channel.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct MpscFdReceiver<T> {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 75 |     receiver: Receiver<T>,
[INFO] [stdout] 76 |     blocking: bool,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `set_blocking` is never used
[INFO] [stdout]    --> src/channel.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn set_blocking(fd: RawFd) -> io::Result<()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_set` is never used
[INFO] [stdout]    --> src/channel.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 182 | impl FdSet {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn is_set(&self, fd: RawFd) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `Command { std: "docker" "inspect" "b384cb1ae2c929c4e9cf3680924c1d26e02a738f9d0a09d2c203ba21d1490477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b384cb1ae2c929c4e9cf3680924c1d26e02a738f9d0a09d2c203ba21d1490477", kill_on_drop: false }`
[INFO] [stdout] b384cb1ae2c929c4e9cf3680924c1d26e02a738f9d0a09d2c203ba21d1490477
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b34cfe8a77aab53ffaed0a6d96778514ecff0a599201fff5f8ffbd3011459f5e
[INFO] running `Command { std: "docker" "start" "-a" "b34cfe8a77aab53ffaed0a6d96778514ecff0a599201fff5f8ffbd3011459f5e", kill_on_drop: false }`
[INFO] [stdout] warning: field `blocking` is never read
[INFO] [stdout]   --> src/channel.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct MpscFdReceiver<T> {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 75 |     receiver: Receiver<T>,
[INFO] [stdout] 76 |     blocking: bool,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `set_blocking` is never used
[INFO] [stdout]    --> src/channel.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn set_blocking(fd: RawFd) -> io::Result<()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_set` is never used
[INFO] [stdout]    --> src/channel.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 182 | impl FdSet {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn is_set(&self, fd: RawFd) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sync-fd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `blocking` is never read
[INFO] [stdout]   --> src/channel.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct MpscFdReceiver<T> {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 75 |     receiver: Receiver<T>,
[INFO] [stdout] 76 |     blocking: bool,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `set_blocking` is never used
[INFO] [stdout]    --> src/channel.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn set_blocking(fd: RawFd) -> io::Result<()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_set` is never used
[INFO] [stdout]    --> src/channel.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 182 | impl FdSet {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn is_set(&self, fd: RawFd) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "b34cfe8a77aab53ffaed0a6d96778514ecff0a599201fff5f8ffbd3011459f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b34cfe8a77aab53ffaed0a6d96778514ecff0a599201fff5f8ffbd3011459f5e", kill_on_drop: false }`
[INFO] [stdout] b34cfe8a77aab53ffaed0a6d96778514ecff0a599201fff5f8ffbd3011459f5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 00418487dd23ab7641199c892af71c2a33715ad15740b41dcebb9573de541dd2
[INFO] running `Command { std: "docker" "start" "-a" "00418487dd23ab7641199c892af71c2a33715ad15740b41dcebb9573de541dd2", kill_on_drop: false }`
[INFO] [stderr] warning: field `blocking` is never read
[INFO] [stderr]   --> src/channel.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub struct MpscFdReceiver<T> {
[INFO] [stderr]    |            -------------- field in this struct
[INFO] [stderr] 75 |     receiver: Receiver<T>,
[INFO] [stderr] 76 |     blocking: bool,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `set_blocking` is never used
[INFO] [stderr]    --> src/channel.rs:115:4
[INFO] [stderr]     |
[INFO] [stderr] 115 | fn set_blocking(fd: RawFd) -> io::Result<()> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `is_set` is never used
[INFO] [stderr]    --> src/channel.rs:209:8
[INFO] [stderr]     |
[INFO] [stderr] 182 | impl FdSet {
[INFO] [stderr]     | ---------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 209 |     fn is_set(&self, fd: RawFd) -> bool {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sync-fd` (lib) generated 3 warnings
[INFO] [stderr] warning: `sync-fd` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sync_fd-2ae2e2588f547976)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test channel::tests::test_mpsc_fd_pair ... ok
[INFO] [stdout] test channel::tests::torture_test_pipe_buffer_stress ... ok
[INFO] [stdout] test channel::tests::torture_test_rapid_mode_switching ... ok
[INFO] [stdout] test channel::tests::torture_test_concurrent_access ... ok
[INFO] [stderr]    Doc-tests sync_fd
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 10.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "00418487dd23ab7641199c892af71c2a33715ad15740b41dcebb9573de541dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00418487dd23ab7641199c892af71c2a33715ad15740b41dcebb9573de541dd2", kill_on_drop: false }`
[INFO] [stdout] 00418487dd23ab7641199c892af71c2a33715ad15740b41dcebb9573de541dd2