[INFO] fetching crate mylex 0.1.1...
[INFO] testing mylex-0.1.1 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate mylex 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mylex 0.1.1 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mylex 0.1.1
[INFO] finished tweaking crates.io crate mylex 0.1.1
[INFO] tweaked toml for crates.io crate mylex 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ea2af5cf971d612e888ffa3d5a6024ee0c84e67a350ef11c42f4f466678aae1
[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" "7ea2af5cf971d612e888ffa3d5a6024ee0c84e67a350ef11c42f4f466678aae1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ea2af5cf971d612e888ffa3d5a6024ee0c84e67a350ef11c42f4f466678aae1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ea2af5cf971d612e888ffa3d5a6024ee0c84e67a350ef11c42f4f466678aae1", kill_on_drop: false }`
[INFO] [stdout] 7ea2af5cf971d612e888ffa3d5a6024ee0c84e67a350ef11c42f4f466678aae1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d070744a67885d10f4ac80e05a85448ae61dec0677a851b8667e33a24a608926
[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" "d070744a67885d10f4ac80e05a85448ae61dec0677a851b8667e33a24a608926", kill_on_drop: false }`
[INFO] [stderr]    Compiling mylex v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `last`
[INFO] [stdout]  --> src/string_slicer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     last: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slice`
[INFO] [stdout]   --> src/string_slicer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn slice(&mut self) -> &str {
[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 0.18s
[INFO] running `Command { std: "docker" "inspect" "d070744a67885d10f4ac80e05a85448ae61dec0677a851b8667e33a24a608926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d070744a67885d10f4ac80e05a85448ae61dec0677a851b8667e33a24a608926", kill_on_drop: false }`
[INFO] [stdout] d070744a67885d10f4ac80e05a85448ae61dec0677a851b8667e33a24a608926
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b57733a4b562748f280bd419938a63df5f4187c6b3c27f87d9b68a66c646f820
[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" "b57733a4b562748f280bd419938a63df5f4187c6b3c27f87d9b68a66c646f820", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `last`
[INFO] [stdout]  --> src/string_slicer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     last: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mylex v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `slice`
[INFO] [stdout]   --> src/string_slicer.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn slice(&mut self) -> &str {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "b57733a4b562748f280bd419938a63df5f4187c6b3c27f87d9b68a66c646f820", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b57733a4b562748f280bd419938a63df5f4187c6b3c27f87d9b68a66c646f820", kill_on_drop: false }`
[INFO] [stdout] b57733a4b562748f280bd419938a63df5f4187c6b3c27f87d9b68a66c646f820
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 24ae28c5ae059250b55385e45046f4bc77d28249903303ef9a42fe651b8e67a8
[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" "24ae28c5ae059250b55385e45046f4bc77d28249903303ef9a42fe651b8e67a8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `last`
[INFO] [stderr]  --> src/string_slicer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     last: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `slice`
[INFO] [stderr]   --> src/string_slicer.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn slice(&mut self) -> &str {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mylex` (lib) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mylex-ebea08ec9f911616)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]    Doc-tests mylex
[INFO] [stdout] test string_slicer::tests::test_string_slicer_slice ... ok
[INFO] [stdout] test lexer::test::test_lexer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[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" "24ae28c5ae059250b55385e45046f4bc77d28249903303ef9a42fe651b8e67a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24ae28c5ae059250b55385e45046f4bc77d28249903303ef9a42fe651b8e67a8", kill_on_drop: false }`
[INFO] [stdout] 24ae28c5ae059250b55385e45046f4bc77d28249903303ef9a42fe651b8e67a8