[INFO] cloning repository https://github.com/elferherrera/test_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/elferherrera/test_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felferherrera%2Ftest_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felferherrera%2Ftest_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71fa56baf1f6da517dfaa2d591cb86625891bd92
[INFO] checking elferherrera/test_example against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felferherrera%2Ftest_example" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elferherrera/test_example on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/elferherrera/test_example
[INFO] finished tweaking git repo https://github.com/elferherrera/test_example
[INFO] tweaked toml for git repo https://github.com/elferherrera/test_example written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/elferherrera/test_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51355c5668e4e3e5e1c693ea2dde2640eb67399fcd8f15df826fef692259b73c
[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" "51355c5668e4e3e5e1c693ea2dde2640eb67399fcd8f15df826fef692259b73c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51355c5668e4e3e5e1c693ea2dde2640eb67399fcd8f15df826fef692259b73c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51355c5668e4e3e5e1c693ea2dde2640eb67399fcd8f15df826fef692259b73c", kill_on_drop: false }`
[INFO] [stdout] 51355c5668e4e3e5e1c693ea2dde2640eb67399fcd8f15df826fef692259b73c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f8eedcb125a317a0d0a897fefd61cbce9e2d5735d83b7b5de00c75bd953ce8f3
[INFO] running `Command { std: "docker" "start" "-a" "f8eedcb125a317a0d0a897fefd61cbce9e2d5735d83b7b5de00c75bd953ce8f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking flatbuffers v0.6.1
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking num-complex v0.3.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking num v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking arrow v1.0.1
[INFO] [stderr]     Checking example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `StringBuilder`, `StructBuilder`
[INFO] [stdout]  --> src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 |     StringArray, StructArray, StringBuilder, ArrayBuilder, StructBuilder
[INFO] [stdout]   |                               ^^^^^^^^^^^^^                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `StringBuilder`, `StructBuilder`
[INFO] [stdout]  --> src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 |     StringArray, StructArray, StringBuilder, ArrayBuilder, StructBuilder
[INFO] [stdout]   |                               ^^^^^^^^^^^^^                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayBuilder`
[INFO] [stdout]  --> src/main.rs:5:46
[INFO] [stdout]   |
[INFO] [stdout] 5 |     StringArray, StructArray, StringBuilder, ArrayBuilder, StructBuilder
[INFO] [stdout]   |                                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayBuilder`
[INFO] [stdout]  --> src/main.rs:5:46
[INFO] [stdout]   |
[INFO] [stdout] 5 |     StringArray, StructArray, StringBuilder, ArrayBuilder, StructBuilder
[INFO] [stdout]   |                                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.25s
[INFO] running `Command { std: "docker" "inspect" "f8eedcb125a317a0d0a897fefd61cbce9e2d5735d83b7b5de00c75bd953ce8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8eedcb125a317a0d0a897fefd61cbce9e2d5735d83b7b5de00c75bd953ce8f3", kill_on_drop: false }`
[INFO] [stdout] f8eedcb125a317a0d0a897fefd61cbce9e2d5735d83b7b5de00c75bd953ce8f3