[INFO] cloning repository https://github.com/michaelvoronov/rust_poc_1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelvoronov/rust_poc_1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelvoronov%2Frust_poc_1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelvoronov%2Frust_poc_1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6bd20d5d4d58974fe47748052545dd8c15d67719
[INFO] testing michaelvoronov/rust_poc_1 against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelvoronov%2Frust_poc_1" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michaelvoronov/rust_poc_1
[INFO] finished tweaking git repo https://github.com/michaelvoronov/rust_poc_1
[INFO] tweaked toml for git repo https://github.com/michaelvoronov/rust_poc_1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michaelvoronov/rust_poc_1 on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michaelvoronov/rust_poc_1 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae0ab0b3bd37ab25a75711e55f00662d1c031b7f87adbd676511cd0b774aa14e
[INFO] running `Command { std: "docker" "start" "-a" "ae0ab0b3bd37ab25a75711e55f00662d1c031b7f87adbd676511cd0b774aa14e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae0ab0b3bd37ab25a75711e55f00662d1c031b7f87adbd676511cd0b774aa14e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae0ab0b3bd37ab25a75711e55f00662d1c031b7f87adbd676511cd0b774aa14e", kill_on_drop: false }`
[INFO] [stdout] ae0ab0b3bd37ab25a75711e55f00662d1c031b7f87adbd676511cd0b774aa14e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f25f74b7a3f10cc84c336ba4916b6d7bb179f3eb796eee39076d25674c8dfcb
[INFO] running `Command { std: "docker" "start" "-a" "4f25f74b7a3f10cc84c336ba4916b6d7bb179f3eb796eee39076d25674c8dfcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling arraydeque v0.4.3
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `field` is never read
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SomeStruct {
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 5 |     field: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `field` is never read
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BigStruct {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 9 |     field: ArrayDeque<[Rc<RefCell<SomeStruct>>; 1024], Wrapping>
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "4f25f74b7a3f10cc84c336ba4916b6d7bb179f3eb796eee39076d25674c8dfcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f25f74b7a3f10cc84c336ba4916b6d7bb179f3eb796eee39076d25674c8dfcb", kill_on_drop: false }`
[INFO] [stdout] 4f25f74b7a3f10cc84c336ba4916b6d7bb179f3eb796eee39076d25674c8dfcb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1159f3665ac438aceb98b8585c7e7de8e05690d8b7a0bc17fa335fe96bafdfd7
[INFO] running `Command { std: "docker" "start" "-a" "1159f3665ac438aceb98b8585c7e7de8e05690d8b7a0bc17fa335fe96bafdfd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `field` is never read
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SomeStruct {
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 5 |     field: i32
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `field` is never read
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BigStruct {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 9 |     field: ArrayDeque<[Rc<RefCell<SomeStruct>>; 1024], Wrapping>
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "1159f3665ac438aceb98b8585c7e7de8e05690d8b7a0bc17fa335fe96bafdfd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1159f3665ac438aceb98b8585c7e7de8e05690d8b7a0bc17fa335fe96bafdfd7", kill_on_drop: false }`
[INFO] [stdout] 1159f3665ac438aceb98b8585c7e7de8e05690d8b7a0bc17fa335fe96bafdfd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Copt-level=3" "-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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8f9642d82188cf267dd31341f2ea34b21cf0153d2feea9b7418648df85874673
[INFO] running `Command { std: "docker" "start" "-a" "8f9642d82188cf267dd31341f2ea34b21cf0153d2feea9b7418648df85874673", kill_on_drop: false }`
[INFO] [stderr] warning: field `field` is never read
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct SomeStruct {
[INFO] [stderr]   |        ---------- field in this struct
[INFO] [stderr] 5 |     field: i32
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `field` is never read
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct BigStruct {
[INFO] [stderr]   |        --------- field in this struct
[INFO] [stderr] 9 |     field: ArrayDeque<[Rc<RefCell<SomeStruct>>; 1024], Wrapping>
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_experiments` (bin "rust_experiments" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_experiments-15553846578e0de8)
[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" "8f9642d82188cf267dd31341f2ea34b21cf0153d2feea9b7418648df85874673", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f9642d82188cf267dd31341f2ea34b21cf0153d2feea9b7418648df85874673", kill_on_drop: false }`
[INFO] [stdout] 8f9642d82188cf267dd31341f2ea34b21cf0153d2feea9b7418648df85874673