[INFO] fetching crate huffman-rust 0.1.1...
[INFO] checking huffman-rust-0.1.1 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate huffman-rust 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate huffman-rust 0.1.1 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate huffman-rust 0.1.1
[INFO] finished tweaking crates.io crate huffman-rust 0.1.1
[INFO] tweaked toml for crates.io crate huffman-rust 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0927bd4cbe24a077ce3d29d50e068676be289592d85faa17ec68a5f9facc15c
[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" "c0927bd4cbe24a077ce3d29d50e068676be289592d85faa17ec68a5f9facc15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0927bd4cbe24a077ce3d29d50e068676be289592d85faa17ec68a5f9facc15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0927bd4cbe24a077ce3d29d50e068676be289592d85faa17ec68a5f9facc15c", kill_on_drop: false }`
[INFO] [stdout] c0927bd4cbe24a077ce3d29d50e068676be289592d85faa17ec68a5f9facc15c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2570877d1c39dc8f397fe317a0e184404ca21e687a3f5fd635bf18bdcc657daf
[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" "2570877d1c39dc8f397fe317a0e184404ca21e687a3f5fd635bf18bdcc657daf", kill_on_drop: false }`
[INFO] [stderr]     Checking huffman-rust v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:45:69
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn from_read<R: Read>(read: R) -> Result<CanonicalTree, Box<Error>> {
[INFO] [stdout]    |                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:73:94
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn encode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:87:94
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn decode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:19:87
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn buffered_encode<R: Read + Seek, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:23:80
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn buffered_decode<R: Read, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:27:86
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn encode<R: Read + Seek, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:55:79
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn decode<R: Read, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:45:69
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn from_read<R: Read>(read: R) -> Result<CanonicalTree, Box<Error>> {
[INFO] [stdout]    |                                                                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:73:94
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn encode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/canonical.rs:87:94
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn decode<R: Read, W: Write>(&self, read: & mut R, write: & mut W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:19:87
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn buffered_encode<R: Read + Seek, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:23:80
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn buffered_decode<R: Read, W: Write>(read: R, write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:27:86
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn encode<R: Read + Seek, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:55:79
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn decode<R: Read, W: Write>(mut read: R, mut write: W) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "2570877d1c39dc8f397fe317a0e184404ca21e687a3f5fd635bf18bdcc657daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2570877d1c39dc8f397fe317a0e184404ca21e687a3f5fd635bf18bdcc657daf", kill_on_drop: false }`
[INFO] [stdout] 2570877d1c39dc8f397fe317a0e184404ca21e687a3f5fd635bf18bdcc657daf