[INFO] updating cached repository kevinwilde/chat_server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kevinwilde/chat_server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kevinwilde/chat_server" "work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kevinwilde/chat_server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kevinwilde/chat_server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kevinwilde/chat_server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f8e45c687d8d0e7fbed9842f1c590b3b55703cff
[INFO] sha for GitHub repo kevinwilde/chat_server: f8e45c687d8d0e7fbed9842f1c590b3b55703cff
[INFO] validating manifest of kevinwilde/chat_server on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kevinwilde/chat_server on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kevinwilde/chat_server
[INFO] finished frobbing kevinwilde/chat_server
[INFO] frobbed toml for kevinwilde/chat_server written to work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server/Cargo.toml
[INFO] started frobbing kevinwilde/chat_server
[INFO] finished frobbing kevinwilde/chat_server
[INFO] frobbed toml for kevinwilde/chat_server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kevinwilde/chat_server/Cargo.toml
[INFO] crate kevinwilde/chat_server already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing kevinwilde/chat_server against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 1f92e7642a745015ff3699a26567b5dbec82ff2c7ddfae2cfaeb8c0df0a25178
[INFO] running `"docker" "start" "-a" "1f92e7642a745015ff3699a26567b5dbec82ff2c7ddfae2cfaeb8c0df0a25178"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling chat_server v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `size`
[INFO] [stderr]   --> src/roommap.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn size(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.31s
[INFO] running `"docker" "inspect" "1f92e7642a745015ff3699a26567b5dbec82ff2c7ddfae2cfaeb8c0df0a25178"`
[INFO] running `"docker" "rm" "-f" "1f92e7642a745015ff3699a26567b5dbec82ff2c7ddfae2cfaeb8c0df0a25178"`
[INFO] [stdout] 1f92e7642a745015ff3699a26567b5dbec82ff2c7ddfae2cfaeb8c0df0a25178
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9ba53004915c80c79181512d4c22d91e5a7e5381cc3e76152117926082f4917b
[INFO] running `"docker" "start" "-a" "9ba53004915c80c79181512d4c22d91e5a7e5381cc3e76152117926082f4917b"`
[INFO] [stderr]    Compiling chat_server v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `size`
[INFO] [stderr]   --> src/roommap.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn size(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `"docker" "inspect" "9ba53004915c80c79181512d4c22d91e5a7e5381cc3e76152117926082f4917b"`
[INFO] running `"docker" "rm" "-f" "9ba53004915c80c79181512d4c22d91e5a7e5381cc3e76152117926082f4917b"`
[INFO] [stdout] 9ba53004915c80c79181512d4c22d91e5a7e5381cc3e76152117926082f4917b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kevinwilde/chat_server:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] d386e1bad890692b79aff5e883520ade20af4f662c790b8818b5148a8ea88a7e
[INFO] running `"docker" "start" "-a" "d386e1bad890692b79aff5e883520ade20af4f662c790b8818b5148a8ea88a7e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chat_server-250bd4d104c63109
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test command::command_tests::parse_command_test_q ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_list ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_help ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_quit ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_logoff ... ok
[INFO] [stdout] test command::command_tests::parse_command_test_unrecognized ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d386e1bad890692b79aff5e883520ade20af4f662c790b8818b5148a8ea88a7e"`
[INFO] running `"docker" "rm" "-f" "d386e1bad890692b79aff5e883520ade20af4f662c790b8818b5148a8ea88a7e"`
[INFO] [stdout] d386e1bad890692b79aff5e883520ade20af4f662c790b8818b5148a8ea88a7e