[INFO] cloning repository https://github.com/teltam/ferrum-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/teltam/ferrum-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteltam%2Fferrum-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteltam%2Fferrum-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d29489f82ee8fce4e2549c9bb1a1560c90bb0470
[INFO] checking teltam/ferrum-rs against try#1f308f12738d8cc40bb23bf0c8114b37c164bb49 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteltam%2Fferrum-rs" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/teltam/ferrum-rs on toolchain 1f308f12738d8cc40bb23bf0c8114b37c164bb49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/teltam/ferrum-rs
[INFO] finished tweaking git repo https://github.com/teltam/ferrum-rs
[INFO] tweaked toml for git repo https://github.com/teltam/ferrum-rs written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/teltam/ferrum-rs 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" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b632e920f22d3210aa280e78748734a7dedc6eedd359309168dd01f459bf30e
[INFO] running `Command { std: "docker" "start" "-a" "7b632e920f22d3210aa280e78748734a7dedc6eedd359309168dd01f459bf30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b632e920f22d3210aa280e78748734a7dedc6eedd359309168dd01f459bf30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b632e920f22d3210aa280e78748734a7dedc6eedd359309168dd01f459bf30e", kill_on_drop: false }`
[INFO] [stdout] 7b632e920f22d3210aa280e78748734a7dedc6eedd359309168dd01f459bf30e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c0f108dd7a6b0d8e17192f02e34b7868f887ea1b320ceba1694109e141876d6
[INFO] running `Command { std: "docker" "start" "-a" "4c0f108dd7a6b0d8e17192f02e34b7868f887ea1b320ceba1694109e141876d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling serde v1.0.213
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking cpufeatures v0.2.14
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.85
[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 sha2 v0.10.8
[INFO] [stderr]    Compiling serde_derive v1.0.213
[INFO] [stderr]     Checking ferrum-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `new` and `hash` are never used
[INFO] [stdout]   --> src/flush.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl DataBlock {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(block_size: usize) -> DataBlock {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn hash(&self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `flush` is never used
[INFO] [stdout]   --> src/flush.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn flush(mem_table: &MemTable) -> std::io::Result<MemTable> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hash` is never used
[INFO] [stdout]   --> src/mem_table.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl MemTableEntry {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 23 |     fn hash(&self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `put` are never used
[INFO] [stdout]   --> src/mem_table.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl MemTable {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 49 |     pub fn new() -> MemTable {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn get(&self, key: String) -> Option<u32> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn put(&mut self, key: String, value: u32) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.89s
[INFO] running `Command { std: "docker" "inspect" "4c0f108dd7a6b0d8e17192f02e34b7868f887ea1b320ceba1694109e141876d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c0f108dd7a6b0d8e17192f02e34b7868f887ea1b320ceba1694109e141876d6", kill_on_drop: false }`
[INFO] [stdout] 4c0f108dd7a6b0d8e17192f02e34b7868f887ea1b320ceba1694109e141876d6