[INFO] fetching crate unshare 0.7.0...
[INFO] building unshare-0.7.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate unshare 0.7.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate unshare 0.7.0
[INFO] finished tweaking crates.io crate unshare 0.7.0
[INFO] tweaked toml for crates.io crate unshare 0.7.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unshare 0.7.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate unshare 0.7.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e6cdaff30eb2ae1cf79384a231e27f279d513780c128cbac89e84dbf6fa874f
[INFO] running `Command { std: "docker" "start" "-a" "1e6cdaff30eb2ae1cf79384a231e27f279d513780c128cbac89e84dbf6fa874f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e6cdaff30eb2ae1cf79384a231e27f279d513780c128cbac89e84dbf6fa874f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e6cdaff30eb2ae1cf79384a231e27f279d513780c128cbac89e84dbf6fa874f", kill_on_drop: false }`
[INFO] [stdout] 1e6cdaff30eb2ae1cf79384a231e27f279d513780c128cbac89e84dbf6fa874f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 339e78d37580a46e2281b30ff45a4c99bd071a5c3d63329cd93233351ad40fc9
[INFO] running `Command { std: "docker" "start" "-a" "339e78d37580a46e2281b30ff45a4c99bd071a5c3d63329cd93233351ad40fc9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling unshare v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/error.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout]    |                            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 93 -     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout] 93 +     BeforeUnfreeze(Box<dyn ::std::error::Error  + Send + Sync + 'static>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]    --> src/child.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     extern {
[INFO] [stdout]     |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:75:25
[INFO] [stdout]    |
[INFO] [stdout] 75 | type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout]    |                         ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 75 - type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout] 75 + type BoxError = Box<dyn ::std::error::Error + Send + Sync + 'static>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fd_lookup` is never read
[INFO] [stdout]   --> src/run.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ChildInfo<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fd_lookup: &'a HashMap<RawFd, RawFd>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `Command { std: "docker" "inspect" "339e78d37580a46e2281b30ff45a4c99bd071a5c3d63329cd93233351ad40fc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "339e78d37580a46e2281b30ff45a4c99bd071a5c3d63329cd93233351ad40fc9", kill_on_drop: false }`
[INFO] [stdout] 339e78d37580a46e2281b30ff45a4c99bd071a5c3d63329cd93233351ad40fc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b359f531bdbb8a828481346a6a0f044d33fdb22295fa07b12ad5a30b3a834ff4
[INFO] running `Command { std: "docker" "start" "-a" "b359f531bdbb8a828481346a6a0f044d33fdb22295fa07b12ad5a30b3a834ff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling argparse v0.2.2
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/error.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout]    |                            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 93 -     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout] 93 +     BeforeUnfreeze(Box<dyn ::std::error::Error  + Send + Sync + 'static>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]    --> src/child.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     extern {
[INFO] [stdout]     |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:75:25
[INFO] [stdout]    |
[INFO] [stdout] 75 | type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout]    |                         ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 75 - type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout] 75 + type BoxError = Box<dyn ::std::error::Error + Send + Sync + 'static>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fd_lookup` is never read
[INFO] [stdout]   --> src/run.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ChildInfo<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fd_lookup: &'a HashMap<RawFd, RawFd>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling unshare v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/error.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout]    |                            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 93 -     BeforeUnfreeze(Box<dyn (::std::error::Error) + Send + Sync + 'static>),
[INFO] [stdout] 93 +     BeforeUnfreeze(Box<dyn ::std::error::Error  + Send + Sync + 'static>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]    --> src/child.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 294 |     extern {
[INFO] [stdout]     |     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:75:25
[INFO] [stdout]    |
[INFO] [stdout] 75 | type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout]    |                         ^                   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 75 - type BoxError = Box<dyn (::std::error::Error) + Send + Sync + 'static>;
[INFO] [stdout] 75 + type BoxError = Box<dyn ::std::error::Error + Send + Sync + 'static>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fd_lookup` is never read
[INFO] [stdout]   --> src/run.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct ChildInfo<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fd_lookup: &'a HashMap<RawFd, RawFd>,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "b359f531bdbb8a828481346a6a0f044d33fdb22295fa07b12ad5a30b3a834ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b359f531bdbb8a828481346a6a0f044d33fdb22295fa07b12ad5a30b3a834ff4", kill_on_drop: false }`
[INFO] [stdout] b359f531bdbb8a828481346a6a0f044d33fdb22295fa07b12ad5a30b3a834ff4