[INFO] updating cached repository https://github.com/PeterCxy/huffman-coding-cse104-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] checking PeterCxy/huffman-coding-cse104-rust against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterCxy%2Fhuffman-coding-cse104-rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PeterCxy/huffman-coding-cse104-rust on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PeterCxy/huffman-coding-cse104-rust
[INFO] finished tweaking git repo https://github.com/PeterCxy/huffman-coding-cse104-rust
[INFO] tweaked toml for git repo https://github.com/PeterCxy/huffman-coding-cse104-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/PeterCxy/huffman-coding-cse104-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8559107c2cc15a8023b499e2fcfe7eb59dfd761346d730fce0a37dd38e70f6b
[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" "e8559107c2cc15a8023b499e2fcfe7eb59dfd761346d730fce0a37dd38e70f6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8559107c2cc15a8023b499e2fcfe7eb59dfd761346d730fce0a37dd38e70f6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8559107c2cc15a8023b499e2fcfe7eb59dfd761346d730fce0a37dd38e70f6b", kill_on_drop: false }`
[INFO] [stdout] e8559107c2cc15a8023b499e2fcfe7eb59dfd761346d730fce0a37dd38e70f6b
[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" "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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d7d3d995dde08688ccbaf5fba991dcf9572db089d55cd26be14d27db4606e2e
[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" "8d7d3d995dde08688ccbaf5fba991dcf9572db089d55cd26be14d27db4606e2e", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/traversal.rs:50:47
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn visit_node<'b>(&'b mut self, node: &'a TraversableNode) -> Option<Result<(BitVec<u32>, u8), TreeTraverser<'a>>> {
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[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/main.rs:177:49
[INFO] [stdout]     |
[INFO] [stdout] 177 | fn _huffman_decode_step(cur_value: bool, node: &TraversableNode) -> &TreeNode {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/traversal.rs:50:47
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn visit_node<'b>(&'b mut self, node: &'a TraversableNode) -> Option<Result<(BitVec<u32>, u8), TreeTraverser<'a>>> {
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[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/main.rs:177:49
[INFO] [stdout]     |
[INFO] [stdout] 177 | fn _huffman_decode_step(cur_value: bool, node: &TraversableNode) -> &TreeNode {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.78s
[INFO] running `Command { std: "docker" "inspect" "8d7d3d995dde08688ccbaf5fba991dcf9572db089d55cd26be14d27db4606e2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d7d3d995dde08688ccbaf5fba991dcf9572db089d55cd26be14d27db4606e2e", kill_on_drop: false }`
[INFO] [stdout] 8d7d3d995dde08688ccbaf5fba991dcf9572db089d55cd26be14d27db4606e2e