[INFO] cloning repository https://github.com/cspr-rad/prusti-lunchnlearn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cspr-rad/prusti-lunchnlearn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcspr-rad%2Fprusti-lunchnlearn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcspr-rad%2Fprusti-lunchnlearn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e7683df874edb46e134c85235f3b41c17572c55d
[INFO] testing cspr-rad/prusti-lunchnlearn against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcspr-rad%2Fprusti-lunchnlearn" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cspr-rad/prusti-lunchnlearn
[INFO] finished tweaking git repo https://github.com/cspr-rad/prusti-lunchnlearn
[INFO] tweaked toml for git repo https://github.com/cspr-rad/prusti-lunchnlearn written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cspr-rad/prusti-lunchnlearn on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cspr-rad/prusti-lunchnlearn 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 824bbb01343c136254ab75ee5518e2eb4c1d74d86c3f1df9d4e700d795e369c6
[INFO] running `Command { std: "docker" "start" "-a" "824bbb01343c136254ab75ee5518e2eb4c1d74d86c3f1df9d4e700d795e369c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "824bbb01343c136254ab75ee5518e2eb4c1d74d86c3f1df9d4e700d795e369c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "824bbb01343c136254ab75ee5518e2eb4c1d74d86c3f1df9d4e700d795e369c6", kill_on_drop: false }`
[INFO] [stdout] 824bbb01343c136254ab75ee5518e2eb4c1d74d86c3f1df9d4e700d795e369c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae411afdf72d28b9a02765a9e08074ea78989db80f1638e583593c71bb2724a9
[INFO] running `Command { std: "docker" "start" "-a" "ae411afdf72d28b9a02765a9e08074ea78989db80f1638e583593c71bb2724a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling prusti-contracts-proc-macros v0.2.0
[INFO] [stderr]    Compiling prusti-contracts v0.2.0
[INFO] [stderr]    Compiling prusti-std v0.2.0
[INFO] [stderr]    Compiling prusti-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl List {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "ae411afdf72d28b9a02765a9e08074ea78989db80f1638e583593c71bb2724a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae411afdf72d28b9a02765a9e08074ea78989db80f1638e583593c71bb2724a9", kill_on_drop: false }`
[INFO] [stdout] ae411afdf72d28b9a02765a9e08074ea78989db80f1638e583593c71bb2724a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bc77f523326f18b8a1f55984043fc4215cdae5a371c2b5393969c8dd04f18a3
[INFO] running `Command { std: "docker" "start" "-a" "1bc77f523326f18b8a1f55984043fc4215cdae5a371c2b5393969c8dd04f18a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling prusti-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl List {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "1bc77f523326f18b8a1f55984043fc4215cdae5a371c2b5393969c8dd04f18a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bc77f523326f18b8a1f55984043fc4215cdae5a371c2b5393969c8dd04f18a3", kill_on_drop: false }`
[INFO] [stdout] 1bc77f523326f18b8a1f55984043fc4215cdae5a371c2b5393969c8dd04f18a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 19757ee7c33a5516e294b457fb706adbb7eeaed8a44dff3954dbe8a557ec7357
[INFO] running `Command { std: "docker" "start" "-a" "19757ee7c33a5516e294b457fb706adbb7eeaed8a44dff3954dbe8a557ec7357", kill_on_drop: false }`
[INFO] [stderr] warning: method `len` is never used
[INFO] [stderr]   --> src/main.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl List {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 21 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `prusti-demo` (bin "prusti-demo" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/prusti_demo-42b8751520383665)
[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" "19757ee7c33a5516e294b457fb706adbb7eeaed8a44dff3954dbe8a557ec7357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19757ee7c33a5516e294b457fb706adbb7eeaed8a44dff3954dbe8a557ec7357", kill_on_drop: false }`
[INFO] [stdout] 19757ee7c33a5516e294b457fb706adbb7eeaed8a44dff3954dbe8a557ec7357