[INFO] updating cached repository Ajhaa/sessions
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ajhaa/sessions
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ajhaa/sessions" "work/ex/beta-1.38-1/sources/1.37.0/gh/Ajhaa/sessions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Ajhaa/sessions'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ajhaa/sessions" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1c9a61a98786b17804d86f720c27d1d6b1e08bd1
[INFO] sha for GitHub repo Ajhaa/sessions: 1c9a61a98786b17804d86f720c27d1d6b1e08bd1
[INFO] validating manifest of Ajhaa/sessions 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 Ajhaa/sessions 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 Ajhaa/sessions
[INFO] finished frobbing Ajhaa/sessions
[INFO] frobbed toml for Ajhaa/sessions written to work/ex/beta-1.38-1/sources/1.37.0/gh/Ajhaa/sessions/Cargo.toml
[INFO] started frobbing Ajhaa/sessions
[INFO] finished frobbing Ajhaa/sessions
[INFO] frobbed toml for Ajhaa/sessions written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions/Cargo.toml
[INFO] crate Ajhaa/sessions 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing Ajhaa/sessions against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 255fc5f953aa90b050422434b51cdb273f6eb20d280b69d314e6f08bb16caf06
[INFO] running `"docker" "start" "-a" "255fc5f953aa90b050422434b51cdb273f6eb20d280b69d314e6f08bb16caf06"`
[INFO] [stderr]    Compiling serde_json v1.0.31
[INFO] [stderr]    Compiling fearless v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/main.rs:11:14
[INFO] [stderr]    |
[INFO] [stderr] 11 | use serde::{ Deserialize, Serialize };
[INFO] [stderr]    |              ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.84s
[INFO] running `"docker" "inspect" "255fc5f953aa90b050422434b51cdb273f6eb20d280b69d314e6f08bb16caf06"`
[INFO] running `"docker" "rm" "-f" "255fc5f953aa90b050422434b51cdb273f6eb20d280b69d314e6f08bb16caf06"`
[INFO] [stdout] 255fc5f953aa90b050422434b51cdb273f6eb20d280b69d314e6f08bb16caf06
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 77ed9c15bc1d1529dcab6c28cb9acddc6adec8b140855592b1b064bbc8104811
[INFO] running `"docker" "start" "-a" "77ed9c15bc1d1529dcab6c28cb9acddc6adec8b140855592b1b064bbc8104811"`
[INFO] [stderr]    Compiling fearless v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/main.rs:11:14
[INFO] [stderr]    |
[INFO] [stderr] 11 | use serde::{ Deserialize, Serialize };
[INFO] [stderr]    |              ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "77ed9c15bc1d1529dcab6c28cb9acddc6adec8b140855592b1b064bbc8104811"`
[INFO] running `"docker" "rm" "-f" "77ed9c15bc1d1529dcab6c28cb9acddc6adec8b140855592b1b064bbc8104811"`
[INFO] [stdout] 77ed9c15bc1d1529dcab6c28cb9acddc6adec8b140855592b1b064bbc8104811
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Ajhaa/sessions:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 4954727ed11ad0e72edc9ca0d5626758aeb9111ee4d51c96d0458cc832fbdaf0
[INFO] running `"docker" "start" "-a" "4954727ed11ad0e72edc9ca0d5626758aeb9111ee4d51c96d0458cc832fbdaf0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fearless-426673859a01fac4
[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" "4954727ed11ad0e72edc9ca0d5626758aeb9111ee4d51c96d0458cc832fbdaf0"`
[INFO] running `"docker" "rm" "-f" "4954727ed11ad0e72edc9ca0d5626758aeb9111ee4d51c96d0458cc832fbdaf0"`
[INFO] [stdout] 4954727ed11ad0e72edc9ca0d5626758aeb9111ee4d51c96d0458cc832fbdaf0