[INFO] cloning repository https://github.com/rowans329/hsh
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rowans329/hsh" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frowans329%2Fhsh", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frowans329%2Fhsh'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5ebff697742fd951433059e7a735110c36973a4
[INFO] checking rowans329/hsh/a5ebff697742fd951433059e7a735110c36973a4 against da86f4d0726be475afbbffe40cb2f65741c51ad3 for pr-159877
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frowans329%2Fhsh" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rowans329/hsh
[INFO] finished tweaking git repo https://github.com/rowans329/hsh
[INFO] tweaked toml for git repo https://github.com/rowans329/hsh written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rowans329/hsh on toolchain da86f4d0726be475afbbffe40cb2f65741c51ad3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+da86f4d0726be475afbbffe40cb2f65741c51ad3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rowans329/hsh 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" "+da86f4d0726be475afbbffe40cb2f65741c51ad3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded md4 v0.9.0
[INFO] [stderr]   Downloaded blowfish v0.8.0
[INFO] [stderr]   Downloaded float-cmp v0.8.0
[INFO] [stderr]   Downloaded md2 v0.9.0
[INFO] [stderr]   Downloaded gost94 v0.9.1
[INFO] [stderr]   Downloaded ripemd160 v0.9.1
[INFO] [stderr]   Downloaded bcrypt v0.10.1
[INFO] [stderr]   Downloaded b64 v0.4.0
[INFO] [stderr]   Downloaded cpufeatures v0.1.1
[INFO] [stderr]   Downloaded whirlpool v0.9.0
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] [stderr]   Downloaded colored v1.9.3
[INFO] [stderr]   Downloaded bit-vec v0.6.2
[INFO] [stderr]   Downloaded assert_cmd v1.0.3
[INFO] [stderr]   Downloaded streebog v0.9.2
[INFO] [stderr]   Downloaded blake2 v0.9.2
[INFO] [stderr]   Downloaded syn v1.0.53
[INFO] [stderr]   Downloaded groestl v0.9.0
[INFO] [stderr]   Downloaded fern v0.6.0
[INFO] [stderr]   Downloaded shabal v0.3.0
[INFO] [stderr]   Downloaded ripemd320 v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2
[INFO] running `Command { std: "docker" "start" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2" "/opt/rustwide/cargo-home/bin/cargo" "+da86f4d0726be475afbbffe40cb2f65741c51ad3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2" "/opt/rustwide/cargo-home/bin/cargo" "+da86f4d0726be475afbbffe40cb2f65741c51ad3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking cipher v0.3.0
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]     Checking cpufeatures v0.1.1
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking sha-1 v0.9.6
[INFO] [stderr]     Checking ripemd160 v0.9.1
[INFO] [stderr]     Checking gost94 v0.9.1
[INFO] [stderr]     Checking whirlpool v0.9.0
[INFO] [stderr]     Checking ripemd320 v0.9.0
[INFO] [stderr]     Checking md4 v0.9.0
[INFO] [stderr]     Checking md2 v0.9.0
[INFO] [stderr]     Checking shabal v0.3.0
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]     Checking streebog v0.9.2
[INFO] [stderr]     Checking blake2 v0.9.2
[INFO] [stderr]     Checking groestl v0.9.0
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking b64 v0.4.0
[INFO] [stderr]     Checking blowfish v0.8.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking quick-error v2.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking bcrypt v0.10.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking assert_cmd v1.0.3
[INFO] [stderr]     Checking proptest v1.0.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking hsh v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/format.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn lock(&self) -> MutexGuard<FormatModeInner> {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn lock(&self) -> MutexGuard<'_, FormatModeInner> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/format.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn lock(&self) -> MutexGuard<FormatModeInner> {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn lock(&self) -> MutexGuard<'_, FormatModeInner> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: non-binding let on a synchronization lock
[INFO] [stdout]    --> src/format.rs:234:13
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _ = mode.lock();
[INFO] [stdout]     |             ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(let_underscore_lock)]` (part of `#[deny(let_underscore)]`) on by default
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _unused = mode.lock();
[INFO] [stdout]     |              ++++++
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 234 -         let _ = mode.lock();
[INFO] [stdout] 234 +         drop(mode.lock());
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hsh` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2", kill_on_drop: false }`
[INFO] [stdout] bc834e949967fafc43b47abf49ff3eba7ab1cd7019c01a4a3a33048b4c9350f2
