[INFO] fetching crate io-at 0.4.1...
[INFO] testing io-at-0.4.1 against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] extracting crate io-at 0.4.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate io-at 0.4.1 on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate io-at 0.4.1
[INFO] finished tweaking crates.io crate io-at 0.4.1
[INFO] tweaked toml for crates.io crate io-at 0.4.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tempfile v2.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 873d7a06fecd8b2c38d631e13fb4e86d170ed3740c75180097c88fab224308b5
[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" "873d7a06fecd8b2c38d631e13fb4e86d170ed3740c75180097c88fab224308b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "873d7a06fecd8b2c38d631e13fb4e86d170ed3740c75180097c88fab224308b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "873d7a06fecd8b2c38d631e13fb4e86d170ed3740c75180097c88fab224308b5", kill_on_drop: false }`
[INFO] [stdout] 873d7a06fecd8b2c38d631e13fb4e86d170ed3740c75180097c88fab224308b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c76c7ae4a6859cb35afdea814c80e95716bcb790e5856c8ab1e3a0de16c36cf0
[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" "c76c7ae4a6859cb35afdea814c80e95716bcb790e5856c8ab1e3a0de16c36cf0", kill_on_drop: false }`
[INFO] [stderr]    Compiling io-at v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:269:9
[INFO] [stdout]     |
[INFO] [stdout] 269 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "c76c7ae4a6859cb35afdea814c80e95716bcb790e5856c8ab1e3a0de16c36cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c76c7ae4a6859cb35afdea814c80e95716bcb790e5856c8ab1e3a0de16c36cf0", kill_on_drop: false }`
[INFO] [stdout] c76c7ae4a6859cb35afdea814c80e95716bcb790e5856c8ab1e3a0de16c36cf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9ed5eda7b831ef76c006a258beb29f3e5b7056ee66239c2fb802350802cc53a
[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" "c9ed5eda7b831ef76c006a258beb29f3e5b7056ee66239c2fb802350802cc53a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:269:9
[INFO] [stdout]     |
[INFO] [stdout] 269 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling tempfile v2.2.0
[INFO] [stderr]    Compiling io-at v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:269:9
[INFO] [stdout]     |
[INFO] [stdout] 269 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.43s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c9ed5eda7b831ef76c006a258beb29f3e5b7056ee66239c2fb802350802cc53a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9ed5eda7b831ef76c006a258beb29f3e5b7056ee66239c2fb802350802cc53a", kill_on_drop: false }`
[INFO] [stdout] c9ed5eda7b831ef76c006a258beb29f3e5b7056ee66239c2fb802350802cc53a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 523c33cb8a41923f02c7dee9a6e5a39e3a2bd3c03a33bea8fc01f0e1b6f13554
[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" "523c33cb8a41923f02c7dee9a6e5a39e3a2bd3c03a33bea8fc01f0e1b6f13554", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] running 12 tests
[INFO] [stderr]    --> src/lib.rs:269:9
[INFO] [stderr]     |
[INFO] [stderr] 269 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:269:9
[INFO] [stderr]     |
[INFO] [stderr] 269 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:277:9
[INFO] [stderr]     |
[INFO] [stderr] 277 |         try!(f.seek(SeekFrom::Start(offs)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/io_at-b9e2717e0f07d173)
[INFO] [stdout] test os::raw::do_t ... ok
[INFO] [stdout] test os::file::test::ref_ ... ok
[INFO] [stdout] test os::file::test::base ... ok
[INFO] [stdout] test at_test_impl ... ok
[INFO] [stdout] test slice::do_t ... ok
[INFO] [stdout] test take_test_specifics ... ok
[INFO] [stdout] test vec::do_t ... ok
[INFO] [stdout] test take_test_impl ... ok
[INFO] [stdout] test do_t_locked_seek ... ok
[INFO] [stdout] test do_t_block_limit ... ok
[INFO] [stdout] test vec::ref_vec ... ok
[INFO] [stderr]      Running tests/custom_ref.rs (/opt/rustwide/target/debug/deps/custom_ref-cced62e097ab5be0)
[INFO] [stdout] test do_t_cursor ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests io-at
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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" "523c33cb8a41923f02c7dee9a6e5a39e3a2bd3c03a33bea8fc01f0e1b6f13554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "523c33cb8a41923f02c7dee9a6e5a39e3a2bd3c03a33bea8fc01f0e1b6f13554", kill_on_drop: false }`
[INFO] [stdout] 523c33cb8a41923f02c7dee9a6e5a39e3a2bd3c03a33bea8fc01f0e1b6f13554