[INFO] updating cached repository vijaysharmay/rust-session-part-1
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vijaysharmay/rust-session-part-1
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vijaysharmay/rust-session-part-1" "work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vijaysharmay/rust-session-part-1" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vijaysharmay/rust-session-part-1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vijaysharmay/rust-session-part-1'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c2d2d75c76d8f4dac56cc464f257337e34de687a
[INFO] sha for GitHub repo vijaysharmay/rust-session-part-1: c2d2d75c76d8f4dac56cc464f257337e34de687a
[INFO] validating manifest of vijaysharmay/rust-session-part-1 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 vijaysharmay/rust-session-part-1 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 vijaysharmay/rust-session-part-1
[INFO] finished frobbing vijaysharmay/rust-session-part-1
[INFO] frobbed toml for vijaysharmay/rust-session-part-1 written to work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1/Cargo.toml
[INFO] started frobbing vijaysharmay/rust-session-part-1
[INFO] finished frobbing vijaysharmay/rust-session-part-1
[INFO] frobbed toml for vijaysharmay/rust-session-part-1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vijaysharmay/rust-session-part-1/Cargo.toml
[INFO] crate vijaysharmay/rust-session-part-1 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing vijaysharmay/rust-session-part-1 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1:/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] 72fc326585b8a1d10ef393757f5287d60ba6c5a703cce0f0caeb43e6596b927e
[INFO] running `"docker" "start" "-a" "72fc326585b8a1d10ef393757f5287d60ba6c5a703cce0f0caeb43e6596b927e"`
[INFO] [stderr]    Compiling rust-techtonic-session v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `a1` is never read
[INFO] [stderr]   --> src/lesson_1.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut a1: i32 = 1;
[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 1.97s
[INFO] running `"docker" "inspect" "72fc326585b8a1d10ef393757f5287d60ba6c5a703cce0f0caeb43e6596b927e"`
[INFO] running `"docker" "rm" "-f" "72fc326585b8a1d10ef393757f5287d60ba6c5a703cce0f0caeb43e6596b927e"`
[INFO] [stdout] 72fc326585b8a1d10ef393757f5287d60ba6c5a703cce0f0caeb43e6596b927e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1:/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] 833f11b2d9cc76ade4ca346f4fa12fb3acb35a453c3e5cf0349a707947b7e9e4
[INFO] running `"docker" "start" "-a" "833f11b2d9cc76ade4ca346f4fa12fb3acb35a453c3e5cf0349a707947b7e9e4"`
[INFO] [stderr]    Compiling rust-techtonic-session v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `a1` is never read
[INFO] [stderr]   --> src/lesson_1.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut a1: i32 = 1;
[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 1.14s
[INFO] running `"docker" "inspect" "833f11b2d9cc76ade4ca346f4fa12fb3acb35a453c3e5cf0349a707947b7e9e4"`
[INFO] running `"docker" "rm" "-f" "833f11b2d9cc76ade4ca346f4fa12fb3acb35a453c3e5cf0349a707947b7e9e4"`
[INFO] [stdout] 833f11b2d9cc76ade4ca346f4fa12fb3acb35a453c3e5cf0349a707947b7e9e4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/vijaysharmay/rust-session-part-1:/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] e2ad3fd7a14f38a7664f12644e243416f94e7f40497f909b372df98d677ec84a
[INFO] running `"docker" "start" "-a" "e2ad3fd7a14f38a7664f12644e243416f94e7f40497f909b372df98d677ec84a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_techtonic_session-1c92659d6257bab0
[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" "e2ad3fd7a14f38a7664f12644e243416f94e7f40497f909b372df98d677ec84a"`
[INFO] running `"docker" "rm" "-f" "e2ad3fd7a14f38a7664f12644e243416f94e7f40497f909b372df98d677ec84a"`
[INFO] [stdout] e2ad3fd7a14f38a7664f12644e243416f94e7f40497f909b372df98d677ec84a