[INFO] crate ctap_hmac 0.2.1 is already in cache
[INFO] checking ctap_hmac-0.2.1 against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] extracting crate ctap_hmac 0.2.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate ctap_hmac 0.2.1 on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ctap_hmac 0.2.1
[INFO] finished tweaking crates.io crate ctap_hmac 0.2.1
[INFO] tweaked toml for crates.io crate ctap_hmac 0.2.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate ctap_hmac 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 210f045e29e4e14cdd75323b96490729490677396eca2e6d778b4539e8d17fb0
[INFO] running `"docker" "start" "-a" "210f045e29e4e14cdd75323b96490729490677396eca2e6d778b4539e8d17fb0"`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]     Checking cbor-codec v0.7.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking ctap_hmac v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/hmac.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let mut credential = match args().skip(1).next().map(|h| FidoHmacCredential {
[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: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/hmac.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.28s
[INFO] running `"docker" "inspect" "210f045e29e4e14cdd75323b96490729490677396eca2e6d778b4539e8d17fb0"`
[INFO] running `"docker" "rm" "-f" "210f045e29e4e14cdd75323b96490729490677396eca2e6d778b4539e8d17fb0"`
[INFO] [stdout] 210f045e29e4e14cdd75323b96490729490677396eca2e6d778b4539e8d17fb0