[INFO] cloning repository demostf/sync-rs
[INFO] running `"git" "clone" "--bare" "git://github.com/demostf/sync-rs.git" "work/cache/sources/gh/demostf/sync-rs"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/demostf/sync-rs'...
[INFO] running `"git" "clone" "work/cache/sources/gh/demostf/sync-rs" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/demostf/sync-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/demostf/sync-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/demostf/sync-rs" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f59220df54d22bebd35172e6594837c1ce4a666
[INFO] sha for GitHub repo demostf/sync-rs: 2f59220df54d22bebd35172e6594837c1ce4a666
[INFO] validating manifest of demostf/sync-rs 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 demostf/sync-rs 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 demostf/sync-rs
[INFO] finished frobbing demostf/sync-rs
[INFO] frobbed toml for demostf/sync-rs written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/demostf/sync-rs/Cargo.toml
[INFO] started frobbing demostf/sync-rs
[INFO] finished frobbing demostf/sync-rs
[INFO] frobbed toml for demostf/sync-rs written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs/Cargo.toml
[INFO] crate demostf/sync-rs 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 demostf/sync-rs against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] c121bc72040f8de556d88c28c15920eeffb14694f6c1b7b4fb779b7dc1ce1433
[INFO] running `"docker" "start" "-a" "c121bc72040f8de556d88c28c15920eeffb14694f6c1b7b4fb779b7dc1ce1433"`
[INFO] [stderr]    Compiling serde_json v1.0.3
[INFO] [stderr]    Compiling ws v0.7.3
[INFO] [stderr]    Compiling sync v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 Some(mut session) => {
[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 12.91s
[INFO] running `"docker" "inspect" "c121bc72040f8de556d88c28c15920eeffb14694f6c1b7b4fb779b7dc1ce1433"`
[INFO] running `"docker" "rm" "-f" "c121bc72040f8de556d88c28c15920eeffb14694f6c1b7b4fb779b7dc1ce1433"`
[INFO] [stdout] c121bc72040f8de556d88c28c15920eeffb14694f6c1b7b4fb779b7dc1ce1433
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b96b2b2a35b83e13a93cf8c7fbb4061580151805fb98d6292b1ff8774643b6a2
[INFO] running `"docker" "start" "-a" "b96b2b2a35b83e13a93cf8c7fbb4061580151805fb98d6292b1ff8774643b6a2"`
[INFO] [stderr]    Compiling sync v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 Some(mut session) => {
[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 1.20s
[INFO] running `"docker" "inspect" "b96b2b2a35b83e13a93cf8c7fbb4061580151805fb98d6292b1ff8774643b6a2"`
[INFO] running `"docker" "rm" "-f" "b96b2b2a35b83e13a93cf8c7fbb4061580151805fb98d6292b1ff8774643b6a2"`
[INFO] [stdout] b96b2b2a35b83e13a93cf8c7fbb4061580151805fb98d6292b1ff8774643b6a2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/demostf/sync-rs:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] bfc24da14c5272e17569cd917ffbcb5ca7148e7537fe72888e16213fd7f539cd
[INFO] running `"docker" "start" "-a" "bfc24da14c5272e17569cd917ffbcb5ca7148e7537fe72888e16213fd7f539cd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sync-29b9ebbdcf4c4283
[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" "bfc24da14c5272e17569cd917ffbcb5ca7148e7537fe72888e16213fd7f539cd"`
[INFO] running `"docker" "rm" "-f" "bfc24da14c5272e17569cd917ffbcb5ca7148e7537fe72888e16213fd7f539cd"`
[INFO] [stdout] bfc24da14c5272e17569cd917ffbcb5ca7148e7537fe72888e16213fd7f539cd