[INFO] updating cached repository PeterCxy/huffman-coding-cse104-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PeterCxy/huffman-coding-cse104-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PeterCxy/huffman-coding-cse104-rust" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PeterCxy/huffman-coding-cse104-rust" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PeterCxy/huffman-coding-cse104-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PeterCxy/huffman-coding-cse104-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] sha for GitHub repo PeterCxy/huffman-coding-cse104-rust: f8dae1c157f776aaa7c340f21ebca5741efc6893
[INFO] validating manifest of PeterCxy/huffman-coding-cse104-rust on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of PeterCxy/huffman-coding-cse104-rust on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] finished frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] frobbed toml for PeterCxy/huffman-coding-cse104-rust written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust/Cargo.toml
[INFO] started frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] finished frobbing PeterCxy/huffman-coding-cse104-rust
[INFO] frobbed toml for PeterCxy/huffman-coding-cse104-rust written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/PeterCxy/huffman-coding-cse104-rust/Cargo.toml
[INFO] crate PeterCxy/huffman-coding-cse104-rust has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing PeterCxy/huffman-coding-cse104-rust against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 2e79983ddabdd5db48a97d0ca3466f976d6ce280ff6396fcd5414c00fea6d72c
[INFO] running `"docker" "start" "-a" "2e79983ddabdd5db48a97d0ca3466f976d6ce280ff6396fcd5414c00fea6d72c"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.13s
[INFO] running `"docker" "inspect" "2e79983ddabdd5db48a97d0ca3466f976d6ce280ff6396fcd5414c00fea6d72c"`
[INFO] running `"docker" "rm" "-f" "2e79983ddabdd5db48a97d0ca3466f976d6ce280ff6396fcd5414c00fea6d72c"`
[INFO] [stdout] 2e79983ddabdd5db48a97d0ca3466f976d6ce280ff6396fcd5414c00fea6d72c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9ec57f9453f30e9a62119af1a26e3b6b5e68e8ca8328519971e10655da2afb9b
[INFO] running `"docker" "start" "-a" "9ec57f9453f30e9a62119af1a26e3b6b5e68e8ca8328519971e10655da2afb9b"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "9ec57f9453f30e9a62119af1a26e3b6b5e68e8ca8328519971e10655da2afb9b"`
[INFO] running `"docker" "rm" "-f" "9ec57f9453f30e9a62119af1a26e3b6b5e68e8ca8328519971e10655da2afb9b"`
[INFO] [stdout] 9ec57f9453f30e9a62119af1a26e3b6b5e68e8ca8328519971e10655da2afb9b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/PeterCxy/huffman-coding-cse104-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] d19f13d24be441b5d148b156aac33e942dee3e5e063895b3397b023137e04500
[INFO] running `"docker" "start" "-a" "d19f13d24be441b5d148b156aac33e942dee3e5e063895b3397b023137e04500"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/huffman-e1f50db41d4e2c29
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d19f13d24be441b5d148b156aac33e942dee3e5e063895b3397b023137e04500"`
[INFO] running `"docker" "rm" "-f" "d19f13d24be441b5d148b156aac33e942dee3e5e063895b3397b023137e04500"`
[INFO] [stdout] d19f13d24be441b5d148b156aac33e942dee3e5e063895b3397b023137e04500