[INFO] cloning repository mpdrescher/huffman-compression
[INFO] running `"git" "clone" "--bare" "git://github.com/mpdrescher/huffman-compression.git" "work/cache/sources/gh/mpdrescher/huffman-compression"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/mpdrescher/huffman-compression'...
[INFO] running `"git" "clone" "work/cache/sources/gh/mpdrescher/huffman-compression" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mpdrescher/huffman-compression" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/mpdrescher/huffman-compression"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/mpdrescher/huffman-compression'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f7270fd9505444ab81fa668aac53c656adf94f96
[INFO] sha for GitHub repo mpdrescher/huffman-compression: f7270fd9505444ab81fa668aac53c656adf94f96
[INFO] validating manifest of mpdrescher/huffman-compression on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mpdrescher/huffman-compression on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mpdrescher/huffman-compression
[INFO] finished frobbing mpdrescher/huffman-compression
[INFO] frobbed toml for mpdrescher/huffman-compression written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression/Cargo.toml
[INFO] started frobbing mpdrescher/huffman-compression
[INFO] finished frobbing mpdrescher/huffman-compression
[INFO] frobbed toml for mpdrescher/huffman-compression written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/mpdrescher/huffman-compression/Cargo.toml
[INFO] crate mpdrescher/huffman-compression already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mpdrescher/huffman-compression against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] 6e401180807bd245df538eaacbfc33126cc825a0fa7fe1e2adb4259505ac7f13
[INFO] running `"docker" "start" "-a" "6e401180807bd245df538eaacbfc33126cc825a0fa7fe1e2adb4259505ac7f13"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `cur_byte` is never read
[INFO] [stderr]    --> src/huffmantree.rs:188:11
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.60s
[INFO] running `"docker" "inspect" "6e401180807bd245df538eaacbfc33126cc825a0fa7fe1e2adb4259505ac7f13"`
[INFO] running `"docker" "rm" "-f" "6e401180807bd245df538eaacbfc33126cc825a0fa7fe1e2adb4259505ac7f13"`
[INFO] [stdout] 6e401180807bd245df538eaacbfc33126cc825a0fa7fe1e2adb4259505ac7f13
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] a6727e9a8243225d5024ee6bb8ab2abd31eb89bccb4f206ce385ef4581f6ad09
[INFO] running `"docker" "start" "-a" "a6727e9a8243225d5024ee6bb8ab2abd31eb89bccb4f206ce385ef4581f6ad09"`
[INFO] [stderr]    Compiling huffman v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `cur_byte` is never read
[INFO] [stderr]    --> src/huffmantree.rs:188:11
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let mut cur_byte: u8 = 4;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "a6727e9a8243225d5024ee6bb8ab2abd31eb89bccb4f206ce385ef4581f6ad09"`
[INFO] running `"docker" "rm" "-f" "a6727e9a8243225d5024ee6bb8ab2abd31eb89bccb4f206ce385ef4581f6ad09"`
[INFO] [stdout] a6727e9a8243225d5024ee6bb8ab2abd31eb89bccb4f206ce385ef4581f6ad09
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/mpdrescher/huffman-compression:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] b729c674f3380e55352dcb446ed5a2143164827b4b3b529a605b1ea81bef5651
[INFO] running `"docker" "start" "-a" "b729c674f3380e55352dcb446ed5a2143164827b4b3b529a605b1ea81bef5651"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/huffman-e6a40f8f4455e1c0
[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" "b729c674f3380e55352dcb446ed5a2143164827b4b3b529a605b1ea81bef5651"`
[INFO] running `"docker" "rm" "-f" "b729c674f3380e55352dcb446ed5a2143164827b4b3b529a605b1ea81bef5651"`
[INFO] [stdout] b729c674f3380e55352dcb446ed5a2143164827b4b3b529a605b1ea81bef5651