[INFO] cloning repository https://github.com/anish-palakurthi/micrograd-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anish-palakurthi/micrograd-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-palakurthi%2Fmicrograd-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-palakurthi%2Fmicrograd-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 751aece47a929395cf41b1cec9d191dadbfbbcda
[INFO] testing anish-palakurthi/micrograd-rust against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanish-palakurthi%2Fmicrograd-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/anish-palakurthi/micrograd-rust
[INFO] finished tweaking git repo https://github.com/anish-palakurthi/micrograd-rust
[INFO] tweaked toml for git repo https://github.com/anish-palakurthi/micrograd-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/anish-palakurthi/micrograd-rust on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/anish-palakurthi/micrograd-rust 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9be22847911e627bd81a2da03f5e20eedb3c25b87e3a874bde296027d56fe7a0
[INFO] running `Command { std: "docker" "start" "-a" "9be22847911e627bd81a2da03f5e20eedb3c25b87e3a874bde296027d56fe7a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9be22847911e627bd81a2da03f5e20eedb3c25b87e3a874bde296027d56fe7a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9be22847911e627bd81a2da03f5e20eedb3c25b87e3a874bde296027d56fe7a0", kill_on_drop: false }`
[INFO] [stdout] 9be22847911e627bd81a2da03f5e20eedb3c25b87e3a874bde296027d56fe7a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 859734fb767fa486ff7d260a62678e851e782c192dd5fbdf4a37010682e26fc5
[INFO] running `Command { std: "docker" "start" "-a" "859734fb767fa486ff7d260a62678e851e782c192dd5fbdf4a37010682e26fc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling micrograd-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "859734fb767fa486ff7d260a62678e851e782c192dd5fbdf4a37010682e26fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "859734fb767fa486ff7d260a62678e851e782c192dd5fbdf4a37010682e26fc5", kill_on_drop: false }`
[INFO] [stdout] 859734fb767fa486ff7d260a62678e851e782c192dd5fbdf4a37010682e26fc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a18fe01d28d04866cd3183e357370949fd0a3470bdfc4f8586653fac1dca2019
[INFO] running `Command { std: "docker" "start" "-a" "a18fe01d28d04866cd3183e357370949fd0a3470bdfc4f8586653fac1dca2019", kill_on_drop: false }`
[INFO] [stderr]    Compiling micrograd-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:223:13
[INFO] [stdout]     |
[INFO] [stdout] 223 |         let mut a = Value::new(-4.0, vec![], "".to_string());
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:224:13
[INFO] [stdout]     |
[INFO] [stdout] 224 |         let mut b = Value::new(2.0, vec![], "".to_string());
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "a18fe01d28d04866cd3183e357370949fd0a3470bdfc4f8586653fac1dca2019", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a18fe01d28d04866cd3183e357370949fd0a3470bdfc4f8586653fac1dca2019", kill_on_drop: false }`
[INFO] [stdout] a18fe01d28d04866cd3183e357370949fd0a3470bdfc4f8586653fac1dca2019
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0f84eff21c18b0ea26b6894b0fa218934b8300273bd7a90eb4f9b394e5d084fb
[INFO] running `Command { std: "docker" "start" "-a" "0f84eff21c18b0ea26b6894b0fa218934b8300273bd7a90eb4f9b394e5d084fb", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:223:13
[INFO] [stderr]     |
[INFO] [stderr] 223 |         let mut a = Value::new(-4.0, vec![], "".to_string());
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:224:13
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let mut b = Value::new(2.0, vec![], "".to_string());
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `micrograd-rust` (bin "micrograd-rust" test) generated 2 warnings (run `cargo fix --bin "micrograd-rust" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/micrograd_rust-9af457a5fffaba6b)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stderr] error: test failed, to rerun pass `--bin micrograd-rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/micrograd_rust-9af457a5fffaba6b` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "0f84eff21c18b0ea26b6894b0fa218934b8300273bd7a90eb4f9b394e5d084fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f84eff21c18b0ea26b6894b0fa218934b8300273bd7a90eb4f9b394e5d084fb", kill_on_drop: false }`
[INFO] [stdout] 0f84eff21c18b0ea26b6894b0fa218934b8300273bd7a90eb4f9b394e5d084fb
