[INFO] cloning repository https://github.com/lambdaclass/Rust_Merkle_Tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lambdaclass/Rust_Merkle_Tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdaclass%2FRust_Merkle_Tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdaclass%2FRust_Merkle_Tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a22469a5eeac3dc86091b78f9b82da1705038e93
[INFO] checking lambdaclass/Rust_Merkle_Tree against master#4455c8937007f3cc3c078375a335d86dbab391ce for pr-140956
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flambdaclass%2FRust_Merkle_Tree" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lambdaclass/Rust_Merkle_Tree
[INFO] finished tweaking git repo https://github.com/lambdaclass/Rust_Merkle_Tree
[INFO] tweaked toml for git repo https://github.com/lambdaclass/Rust_Merkle_Tree written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lambdaclass/Rust_Merkle_Tree on toolchain 4455c8937007f3cc3c078375a335d86dbab391ce
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4455c8937007f3cc3c078375a335d86dbab391ce" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lambdaclass/Rust_Merkle_Tree 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" "+4455c8937007f3cc3c078375a335d86dbab391ce" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+4455c8937007f3cc3c078375a335d86dbab391ce" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 723784de312931c76f01ca2593d7c84ae6de435fa0735e37c95f4e15a033f473
[INFO] running `Command { std: "docker" "start" "-a" "723784de312931c76f01ca2593d7c84ae6de435fa0735e37c95f4e15a033f473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "723784de312931c76f01ca2593d7c84ae6de435fa0735e37c95f4e15a033f473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "723784de312931c76f01ca2593d7c84ae6de435fa0735e37c95f4e15a033f473", kill_on_drop: false }`
[INFO] [stdout] 723784de312931c76f01ca2593d7c84ae6de435fa0735e37c95f4e15a033f473
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+4455c8937007f3cc3c078375a335d86dbab391ce" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9909af95d642c041ea90a725d34b8a962028efe82d8f09a24c7702b82d420425
[INFO] running `Command { std: "docker" "start" "-a" "9909af95d642c041ea90a725d34b8a962028efe82d8f09a24c7702b82d420425", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking keccak v0.1.3
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]     Checking block-buffer v0.10.3
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.6
[INFO] [stderr]     Checking sha3 v0.10.6
[INFO] [stderr]     Checking Rust_Merkle_Tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `proof` and `verify` are never used
[INFO] [stdout]   --> src/merkle_tree/mod.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MerkleTree {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn proof(&self, mut index: usize) -> Vec<Vec<u8>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn verify(&self, proof: &[Vec<u8>], mut index: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Rust_Merkle_Tree` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_merkle_tree`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "9909af95d642c041ea90a725d34b8a962028efe82d8f09a24c7702b82d420425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9909af95d642c041ea90a725d34b8a962028efe82d8f09a24c7702b82d420425", kill_on_drop: false }`
[INFO] [stdout] 9909af95d642c041ea90a725d34b8a962028efe82d8f09a24c7702b82d420425