[INFO] cloning 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" "clone" "--bare" "https://github.com/PeterCxy/huffman-coding-cse104-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterCxy%2Fhuffman-coding-cse104-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterCxy%2Fhuffman-coding-cse104-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] testing PeterCxy/huffman-coding-cse104-rust against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterCxy%2Fhuffman-coding-cse104-rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PeterCxy/huffman-coding-cse104-rust on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "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-4/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" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", 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] 361d9dcff4bd330f0615c6f5516e105a1b0eb70884cab133835352f357ffd116
[INFO] running `Command { std: "docker" "start" "-a" "361d9dcff4bd330f0615c6f5516e105a1b0eb70884cab133835352f357ffd116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "361d9dcff4bd330f0615c6f5516e105a1b0eb70884cab133835352f357ffd116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "361d9dcff4bd330f0615c6f5516e105a1b0eb70884cab133835352f357ffd116", kill_on_drop: false }`
[INFO] [stdout] 361d9dcff4bd330f0615c6f5516e105a1b0eb70884cab133835352f357ffd116
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95ba3b3c0d3d84a79e8712930ce8c74334ae99cf486bcdd90d1e9ee06dc842dd
[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" "95ba3b3c0d3d84a79e8712930ce8c74334ae99cf486bcdd90d1e9ee06dc842dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.93s
[INFO] running `Command { std: "docker" "inspect" "95ba3b3c0d3d84a79e8712930ce8c74334ae99cf486bcdd90d1e9ee06dc842dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95ba3b3c0d3d84a79e8712930ce8c74334ae99cf486bcdd90d1e9ee06dc842dd", kill_on_drop: false }`
[INFO] [stdout] 95ba3b3c0d3d84a79e8712930ce8c74334ae99cf486bcdd90d1e9ee06dc842dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b60631b0778fba70ea90d3bbad6d993da42fc3e31c3efb0d481a51888b6593a
[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" "0b60631b0778fba70ea90d3bbad6d993da42fc3e31c3efb0d481a51888b6593a", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "0b60631b0778fba70ea90d3bbad6d993da42fc3e31c3efb0d481a51888b6593a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b60631b0778fba70ea90d3bbad6d993da42fc3e31c3efb0d481a51888b6593a", kill_on_drop: false }`
[INFO] [stdout] 0b60631b0778fba70ea90d3bbad6d993da42fc3e31c3efb0d481a51888b6593a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 943d5d5bb0be19768df0e9f4c2ef67df940679557fbea32ccfb7e6f8599ce77d
[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" "943d5d5bb0be19768df0e9f4c2ef67df940679557fbea32ccfb7e6f8599ce77d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/traversal.rs:50:47
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 50 |     fn visit_node<'b>(&'b mut self, node: &'a TraversableNode) -> Option<Result<(BitVec<u32>, u8), TreeTraverser<'a>>> {
[INFO] [stdout] 
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:177:49
[INFO] [stderr]     |
[INFO] [stderr] 177 | fn _huffman_decode_step(cur_value: bool, node: &TraversableNode) -> &TreeNode {
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn TraversableNode`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/huffman-6b45f52958634a5c
[INFO] running `Command { std: "docker" "inspect" "943d5d5bb0be19768df0e9f4c2ef67df940679557fbea32ccfb7e6f8599ce77d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "943d5d5bb0be19768df0e9f4c2ef67df940679557fbea32ccfb7e6f8599ce77d", kill_on_drop: false }`
[INFO] [stdout] 943d5d5bb0be19768df0e9f4c2ef67df940679557fbea32ccfb7e6f8599ce77d