[INFO] cloning repository https://github.com/toni-calvin/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/toni-calvin/merkle-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoni-calvin%2Fmerkle-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoni-calvin%2Fmerkle-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 154ba49ea30b4159e41239fd7e69661f9430729a
[INFO] checking toni-calvin/merkle-tree against master#a7fc463dd8fbeca800d4b3efc501069502cffe64 for pr-136988
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoni-calvin%2Fmerkle-tree" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toni-calvin/merkle-tree on toolchain a7fc463dd8fbeca800d4b3efc501069502cffe64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7fc463dd8fbeca800d4b3efc501069502cffe64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/toni-calvin/merkle-tree
[INFO] finished tweaking git repo https://github.com/toni-calvin/merkle-tree
[INFO] tweaked toml for git repo https://github.com/toni-calvin/merkle-tree written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/toni-calvin/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" "+a7fc463dd8fbeca800d4b3efc501069502cffe64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+a7fc463dd8fbeca800d4b3efc501069502cffe64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8029cd880333d2d4276f90dcaf6a07b27addd988024c0ff65d368c5fc4311326
[INFO] running `Command { std: "docker" "start" "-a" "8029cd880333d2d4276f90dcaf6a07b27addd988024c0ff65d368c5fc4311326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8029cd880333d2d4276f90dcaf6a07b27addd988024c0ff65d368c5fc4311326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8029cd880333d2d4276f90dcaf6a07b27addd988024c0ff65d368c5fc4311326", kill_on_drop: false }`
[INFO] [stdout] 8029cd880333d2d4276f90dcaf6a07b27addd988024c0ff65d368c5fc4311326
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+a7fc463dd8fbeca800d4b3efc501069502cffe64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19cdbd9a249666fe5307efed5e677826424411d3d234420583aa70bfb5aca0eb
[INFO] running `Command { std: "docker" "start" "-a" "19cdbd9a249666fe5307efed5e677826424411d3d234420583aa70bfb5aca0eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking keccak v0.1.4
[INFO] [stderr]     Checking hex-literal v0.4.1
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking merkle-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `proof` and `verify` are never used
[INFO] [stdout]   --> src/merkle_tree.rs:53:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MerkleTree {
[INFO] [stdout]    | --------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |   fn proof(&self, mut index: usize) -> Vec<Vec<u8>> {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |   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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.07s
[INFO] running `Command { std: "docker" "inspect" "19cdbd9a249666fe5307efed5e677826424411d3d234420583aa70bfb5aca0eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19cdbd9a249666fe5307efed5e677826424411d3d234420583aa70bfb5aca0eb", kill_on_drop: false }`
[INFO] [stdout] 19cdbd9a249666fe5307efed5e677826424411d3d234420583aa70bfb5aca0eb