[INFO] updating cached repository jalexvig/comprustion
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jalexvig/comprustion
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jalexvig/comprustion" "work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jalexvig/comprustion" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jalexvig/comprustion"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jalexvig/comprustion'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 00ac1e71e39f4ec4cff4483e4fbe4919b878ee63
[INFO] sha for GitHub repo jalexvig/comprustion: 00ac1e71e39f4ec4cff4483e4fbe4919b878ee63
[INFO] validating manifest of jalexvig/comprustion on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jalexvig/comprustion on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jalexvig/comprustion
[INFO] finished frobbing jalexvig/comprustion
[INFO] frobbed toml for jalexvig/comprustion written to work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion/Cargo.toml
[INFO] started frobbing jalexvig/comprustion
[INFO] finished frobbing jalexvig/comprustion
[INFO] frobbed toml for jalexvig/comprustion written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jalexvig/comprustion/Cargo.toml
[INFO] crate jalexvig/comprustion already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jalexvig/comprustion against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] e4cf67b39587978ccebdb3892d00d41e081a09d5fd99d2b06d66c85bb47d319b
[INFO] running `"docker" "start" "-a" "e4cf67b39587978ccebdb3892d00d41e081a09d5fd99d2b06d66c85bb47d319b"`
[INFO] [stderr]    Compiling comprustion v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/huffman.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut start = 0;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/huffman.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut start = 0;
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `comprustion::huffman`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use comprustion::huffman;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "e4cf67b39587978ccebdb3892d00d41e081a09d5fd99d2b06d66c85bb47d319b"`
[INFO] running `"docker" "rm" "-f" "e4cf67b39587978ccebdb3892d00d41e081a09d5fd99d2b06d66c85bb47d319b"`
[INFO] [stdout] e4cf67b39587978ccebdb3892d00d41e081a09d5fd99d2b06d66c85bb47d319b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion:/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=warn" "-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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 691ea54db7a0ebfbcbdfb350c9b0f1a849a55b57064812f37a34dceb75cf5c5b
[INFO] running `"docker" "start" "-a" "691ea54db7a0ebfbcbdfb350c9b0f1a849a55b57064812f37a34dceb75cf5c5b"`
[INFO] [stderr]    Compiling comprustion v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `comprustion::huffman`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use comprustion::huffman;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/huffman.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut start = 0;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_start`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/huffman.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut start = 0;
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.78s
[INFO] running `"docker" "inspect" "691ea54db7a0ebfbcbdfb350c9b0f1a849a55b57064812f37a34dceb75cf5c5b"`
[INFO] running `"docker" "rm" "-f" "691ea54db7a0ebfbcbdfb350c9b0f1a849a55b57064812f37a34dceb75cf5c5b"`
[INFO] [stdout] 691ea54db7a0ebfbcbdfb350c9b0f1a849a55b57064812f37a34dceb75cf5c5b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jalexvig/comprustion:/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=warn" "-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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 6bc4464d28646ff2634a1e352b9640416e31053296d1e0d93261065c334ebba1
[INFO] running `"docker" "start" "-a" "6bc4464d28646ff2634a1e352b9640416e31053296d1e0d93261065c334ebba1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/comprustion-617e41e1811d27e0
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test huffman::tests::char_counts_simple_string ... ok
[INFO] [stdout] test huffman::tests::decoding_is_inverse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/comprustion-e315358082b23cc5
[INFO] [stderr]    Doc-tests comprustion
[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] [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" "6bc4464d28646ff2634a1e352b9640416e31053296d1e0d93261065c334ebba1"`
[INFO] running `"docker" "rm" "-f" "6bc4464d28646ff2634a1e352b9640416e31053296d1e0d93261065c334ebba1"`
[INFO] [stdout] 6bc4464d28646ff2634a1e352b9640416e31053296d1e0d93261065c334ebba1