[INFO] updating cached repository KyattPL/learning_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/KyattPL/learning_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/KyattPL/learning_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/KyattPL/learning_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/KyattPL/learning_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/KyattPL/learning_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ded046b7de6671f10e48994dd23d274dab18a442
[INFO] sha for GitHub repo KyattPL/learning_rust: ded046b7de6671f10e48994dd23d274dab18a442
[INFO] validating manifest of KyattPL/learning_rust 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 KyattPL/learning_rust 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 KyattPL/learning_rust
[INFO] finished frobbing KyattPL/learning_rust
[INFO] frobbed toml for KyattPL/learning_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust/Cargo.toml
[INFO] started frobbing KyattPL/learning_rust
[INFO] finished frobbing KyattPL/learning_rust
[INFO] frobbed toml for KyattPL/learning_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/KyattPL/learning_rust/Cargo.toml
[INFO] crate KyattPL/learning_rust 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 KyattPL/learning_rust 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust:/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] 456e737539b621dfb66585ec9d94fd7e79dc8b2c9c9eef18e38c031957f9b210
[INFO] running `"docker" "start" "-a" "456e737539b621dfb66585ec9d94fd7e79dc8b2c9c9eef18e38c031957f9b210"`
[INFO] [stderr]    Compiling nauka v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `integer` is never read
[INFO] [stderr]   --> src/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut integer = 0;
[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] warning: field is never used: `id`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     id: String,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "456e737539b621dfb66585ec9d94fd7e79dc8b2c9c9eef18e38c031957f9b210"`
[INFO] running `"docker" "rm" "-f" "456e737539b621dfb66585ec9d94fd7e79dc8b2c9c9eef18e38c031957f9b210"`
[INFO] [stdout] 456e737539b621dfb66585ec9d94fd7e79dc8b2c9c9eef18e38c031957f9b210
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust:/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] f776cdd85bb16abc79e927f2e0198f7a9f4d1408f22c3a0cd3cddba4adad661f
[INFO] running `"docker" "start" "-a" "f776cdd85bb16abc79e927f2e0198f7a9f4d1408f22c3a0cd3cddba4adad661f"`
[INFO] [stderr]    Compiling nauka v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `integer` is never read
[INFO] [stderr]   --> src/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut integer = 0;
[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] warning: field is never used: `id`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     id: String,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "f776cdd85bb16abc79e927f2e0198f7a9f4d1408f22c3a0cd3cddba4adad661f"`
[INFO] running `"docker" "rm" "-f" "f776cdd85bb16abc79e927f2e0198f7a9f4d1408f22c3a0cd3cddba4adad661f"`
[INFO] [stdout] f776cdd85bb16abc79e927f2e0198f7a9f4d1408f22c3a0cd3cddba4adad661f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/KyattPL/learning_rust:/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] a2552cce890cb804f2324814df2095ac8a68490dc53682e14c73afe5df045132
[INFO] running `"docker" "start" "-a" "a2552cce890cb804f2324814df2095ac8a68490dc53682e14c73afe5df045132"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nauka-f2f8a63570ef9a89
[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" "a2552cce890cb804f2324814df2095ac8a68490dc53682e14c73afe5df045132"`
[INFO] running `"docker" "rm" "-f" "a2552cce890cb804f2324814df2095ac8a68490dc53682e14c73afe5df045132"`
[INFO] [stdout] a2552cce890cb804f2324814df2095ac8a68490dc53682e14c73afe5df045132