[INFO] fetching crate ffcnt 0.3.0...
[INFO] checking ffcnt-0.3.0 against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] extracting crate ffcnt 0.3.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate ffcnt 0.3.0 on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ffcnt 0.3.0
[INFO] finished tweaking crates.io crate ffcnt 0.3.0
[INFO] tweaked toml for crates.io crate ffcnt 0.3.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb7ef5a92f5dbed3fa23eb515c0a6fd4e47df4f1c71a5f45d2292d5f35eb0479
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bb7ef5a92f5dbed3fa23eb515c0a6fd4e47df4f1c71a5f45d2292d5f35eb0479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb7ef5a92f5dbed3fa23eb515c0a6fd4e47df4f1c71a5f45d2292d5f35eb0479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb7ef5a92f5dbed3fa23eb515c0a6fd4e47df4f1c71a5f45d2292d5f35eb0479", kill_on_drop: false }`
[INFO] [stdout] bb7ef5a92f5dbed3fa23eb515c0a6fd4e47df4f1c71a5f45d2292d5f35eb0479
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c192b62840752cc348924c0463706efb94d7d0396ee123b49f558f424b68bd2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2c192b62840752cc348924c0463706efb94d7d0396ee123b49f558f424b68bd2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking minilzo-sys v0.1.0
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking mnt v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking minilzo v0.1.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling derive-error v0.0.3
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking btrfs2 v1.2.2
[INFO] [stderr]     Checking platter-walk v0.1.2
[INFO] [stderr]     Checking ffcnt v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:177:56
[INFO] [stdout]     |
[INFO] [stdout] 177 |                     writeln!(std::io::stderr(),"{}", e.description()).unwrap();
[INFO] [stdout]     |                                                        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/main.rs:17:9
[INFO] [stdout]     |
[INFO] [stdout] 17  | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:204:48
[INFO] [stdout]     |
[INFO] [stdout] 204 |             writeln!(std::io::stderr(),"{}", e.description()).unwrap();
[INFO] [stdout]     |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ffcnt`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:177:56
[INFO] [stdout]     |
[INFO] [stdout] 177 |                     writeln!(std::io::stderr(),"{}", e.description()).unwrap();
[INFO] [stdout]     |                                                        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/main.rs:17:9
[INFO] [stdout]     |
[INFO] [stdout] 17  | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:204:48
[INFO] [stdout]     |
[INFO] [stdout] 204 |             writeln!(std::io::stderr(),"{}", e.description()).unwrap();
[INFO] [stdout]     |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2c192b62840752cc348924c0463706efb94d7d0396ee123b49f558f424b68bd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c192b62840752cc348924c0463706efb94d7d0396ee123b49f558f424b68bd2", kill_on_drop: false }`
[INFO] [stdout] 2c192b62840752cc348924c0463706efb94d7d0396ee123b49f558f424b68bd2