[INFO] fetching crate fountain_codes 0.2.1...
[INFO] checking fountain_codes-0.2.1 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate fountain_codes 0.2.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate fountain_codes 0.2.1 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fountain_codes 0.2.1
[INFO] finished tweaking crates.io crate fountain_codes 0.2.1
[INFO] tweaked toml for crates.io crate fountain_codes 0.2.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2363d17f99f41d47335b2e78e5e26abb050aa561be0f02318936f5a15259b8d
[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" "b2363d17f99f41d47335b2e78e5e26abb050aa561be0f02318936f5a15259b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2363d17f99f41d47335b2e78e5e26abb050aa561be0f02318936f5a15259b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2363d17f99f41d47335b2e78e5e26abb050aa561be0f02318936f5a15259b8d", kill_on_drop: false }`
[INFO] [stdout] b2363d17f99f41d47335b2e78e5e26abb050aa561be0f02318936f5a15259b8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 723ad22db9cd107e16dff4d7ccab83b33fe88ed3c542bb5f92964a5efa4874dd
[INFO] running `Command { std: "docker" "start" "-a" "723ad22db9cd107e16dff4d7ccab83b33fe88ed3c542bb5f92964a5efa4874dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking fountain_codes v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/lt.rs:35:36
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let extra_block = cmp::min((data_bytes % BLOCK_BYTES as u64), 1);
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/lt.rs:35:36
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let extra_block = cmp::min((data_bytes % BLOCK_BYTES as u64), 1);
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lt.rs:116:36
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let extra_block = cmp::min((data_bytes % BLOCK_BYTES as u64), 1);
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lt.rs:116:36
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let extra_block = cmp::min((data_bytes % BLOCK_BYTES as u64), 1);
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/distributions.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(density_function: &ProbabilityDensityFunction, limit: u32) -> io::Result<Distribution> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ProbabilityDensityFunction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/distributions.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(density_function: &ProbabilityDensityFunction, limit: u32) -> io::Result<Distribution> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ProbabilityDensityFunction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:31:39
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<P: Packet> PartialEncoder<P> for Encoder<P> {
[INFO] [stdout]    |                                       ^^^^^^^^^^ help: use `dyn`: `dyn Encoder<P>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:31:39
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<P: Packet> PartialEncoder<P> for Encoder<P> {
[INFO] [stdout]    |                                       ^^^^^^^^^^ help: use `dyn`: `dyn Encoder<P>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.86s
[INFO] running `Command { std: "docker" "inspect" "723ad22db9cd107e16dff4d7ccab83b33fe88ed3c542bb5f92964a5efa4874dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "723ad22db9cd107e16dff4d7ccab83b33fe88ed3c542bb5f92964a5efa4874dd", kill_on_drop: false }`
[INFO] [stdout] 723ad22db9cd107e16dff4d7ccab83b33fe88ed3c542bb5f92964a5efa4874dd