[INFO] fetching crate linked-list 0.0.3...
[INFO] testing linked-list-0.0.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate linked-list 0.0.3 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate linked-list 0.0.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate linked-list 0.0.3
[INFO] finished tweaking crates.io crate linked-list 0.0.3
[INFO] tweaked toml for crates.io crate linked-list 0.0.3 written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd787c0d84b8ce19e3790e87dd7e69639b2d066eec0abb0b316a0de914cf5a37
[INFO] running `Command { std: "docker" "start" "-a" "fd787c0d84b8ce19e3790e87dd7e69639b2d066eec0abb0b316a0de914cf5a37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd787c0d84b8ce19e3790e87dd7e69639b2d066eec0abb0b316a0de914cf5a37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd787c0d84b8ce19e3790e87dd7e69639b2d066eec0abb0b316a0de914cf5a37", kill_on_drop: false }`
[INFO] [stdout] fd787c0d84b8ce19e3790e87dd7e69639b2d066eec0abb0b316a0de914cf5a37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 130fd30dcc0dd6eb9b3fbd8790ad4cc2dbc124b7a3269cfdf180cc256ad4a843
[INFO] running `Command { std: "docker" "start" "-a" "130fd30dcc0dd6eb9b3fbd8790ad4cc2dbc124b7a3269cfdf180cc256ad4a843", kill_on_drop: false }`
[INFO] [stderr]    Compiling linked-list v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]   --> src/lib.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::fmt::{self, Debug};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 769 |         try!(write!(f, "["));
[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:773:13
[INFO] [stdout]     |
[INFO] [stdout] 773 |             try!(write!(f, "{:?}", *e));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:772:25
[INFO] [stdout]     |
[INFO] [stdout] 772 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "130fd30dcc0dd6eb9b3fbd8790ad4cc2dbc124b7a3269cfdf180cc256ad4a843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "130fd30dcc0dd6eb9b3fbd8790ad4cc2dbc124b7a3269cfdf180cc256ad4a843", kill_on_drop: false }`
[INFO] [stdout] 130fd30dcc0dd6eb9b3fbd8790ad4cc2dbc124b7a3269cfdf180cc256ad4a843
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b3bb569b1d094da740e59548b35823182ff3227410db17f72819041e4b8d6c7
[INFO] running `Command { std: "docker" "start" "-a" "2b3bb569b1d094da740e59548b35823182ff3227410db17f72819041e4b8d6c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]   --> src/lib.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::fmt::{self, Debug};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 769 |         try!(write!(f, "["));
[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:773:13
[INFO] [stdout]     |
[INFO] [stdout] 773 |             try!(write!(f, "{:?}", *e));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:772:25
[INFO] [stdout]     |
[INFO] [stdout] 772 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling linked-list v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]   --> src/lib.rs:19:22
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::fmt::{self, Debug};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 769 |         try!(write!(f, "["));
[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:773:13
[INFO] [stdout]     |
[INFO] [stdout] 773 |             try!(write!(f, "{:?}", *e));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:772:25
[INFO] [stdout]     |
[INFO] [stdout] 772 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "2b3bb569b1d094da740e59548b35823182ff3227410db17f72819041e4b8d6c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b3bb569b1d094da740e59548b35823182ff3227410db17f72819041e4b8d6c7", kill_on_drop: false }`
[INFO] [stdout] 2b3bb569b1d094da740e59548b35823182ff3227410db17f72819041e4b8d6c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d7f51e53e688a4de4611d27d2a2f83d493cc3826fd9f7e5dc3f9b699bbe3381b
[INFO] running `Command { std: "docker" "start" "-a" "d7f51e53e688a4de4611d27d2a2f83d493cc3826fd9f7e5dc3f9b699bbe3381b", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Debug`
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:19:22
[INFO] [stdout] running 16 tests
[INFO] [stderr]    |
[INFO] [stdout] test tests::test_append ... ok
[INFO] [stderr] 19 | use std::fmt::{self, Debug};
[INFO] [stdout] test tests::test_basic ... ok
[INFO] [stderr]    |                      ^^^^^
[INFO] [stdout] test tests::test_cursor_insert ... ok
[INFO] [stderr]    |
[INFO] [stdout] test tests::test_cursor_remove ... ok
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] test tests::test_debug ... ok
[INFO] [stderr] 
[INFO] [stdout] test tests::test_cursor_seek ... ok
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] test tests::test_eq ... ok
[INFO] [stderr]    --> src/lib.rs:769:9
[INFO] [stdout] test tests::test_iterator ... ok
[INFO] [stderr]     |
[INFO] [stdout] test tests::test_iterator_double_end ... ok
[INFO] [stderr] 769 |         try!(write!(f, "["));
[INFO] [stdout] test tests::test_iterator_mut_double_end ... ok
[INFO] [stderr]     |         ^^^
[INFO] [stdout] test tests::test_mut_iter ... ok
[INFO] [stderr]     |
[INFO] [stdout] test tests::test_ord ... ok
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] test tests::test_ord_nan ... ok
[INFO] [stderr] 
[INFO] [stdout] test tests::test_rev_iter ... ok
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] test tests::test_splice ... ok
[INFO] [stderr]    --> src/lib.rs:773:13
[INFO] [stdout] test tests::test_split_at ... ok
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 773 |             try!(write!(f, "{:?}", *e));
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |             ^^^
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:772:25
[INFO] [stderr]     |
[INFO] [stderr] 772 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `linked-list` (lib) generated 4 warnings
[INFO] [stderr] warning: `linked-list` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/linked_list-43a66e5c554619b3)
[INFO] [stderr]    Doc-tests linked-list
[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" "d7f51e53e688a4de4611d27d2a2f83d493cc3826fd9f7e5dc3f9b699bbe3381b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7f51e53e688a4de4611d27d2a2f83d493cc3826fd9f7e5dc3f9b699bbe3381b", kill_on_drop: false }`
[INFO] [stdout] d7f51e53e688a4de4611d27d2a2f83d493cc3826fd9f7e5dc3f9b699bbe3381b