[INFO] updating cached repository waku-waku/rust-samples
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/waku-waku/rust-samples
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/waku-waku/rust-samples" "work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/waku-waku/rust-samples" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/waku-waku/rust-samples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/waku-waku/rust-samples'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ce06c702b94b5f8274bfac66e57d84538f10c6f8
[INFO] sha for GitHub repo waku-waku/rust-samples: ce06c702b94b5f8274bfac66e57d84538f10c6f8
[INFO] validating manifest of waku-waku/rust-samples 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 waku-waku/rust-samples 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 waku-waku/rust-samples
[INFO] finished frobbing waku-waku/rust-samples
[INFO] frobbed toml for waku-waku/rust-samples written to work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples/Cargo.toml
[INFO] started frobbing waku-waku/rust-samples
[INFO] finished frobbing waku-waku/rust-samples
[INFO] frobbed toml for waku-waku/rust-samples written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/waku-waku/rust-samples/Cargo.toml
[INFO] crate waku-waku/rust-samples 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 waku-waku/rust-samples 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples:/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] 7900231db63e6d883f0b4f479f6416a0b8ab48947bf6e9ea3169d5b08df8f639
[INFO] running `"docker" "start" "-a" "7900231db63e6d883f0b4f479f6416a0b8ab48947bf6e9ea3169d5b08df8f639"`
[INFO] [stderr]    Compiling rust-samples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `src` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut src = String::new();
[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: value assigned to `string` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut string = String::new();
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `"docker" "inspect" "7900231db63e6d883f0b4f479f6416a0b8ab48947bf6e9ea3169d5b08df8f639"`
[INFO] running `"docker" "rm" "-f" "7900231db63e6d883f0b4f479f6416a0b8ab48947bf6e9ea3169d5b08df8f639"`
[INFO] [stdout] 7900231db63e6d883f0b4f479f6416a0b8ab48947bf6e9ea3169d5b08df8f639
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples:/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] df280850feadbeb39cb1a8ab2ad43d4c9d54811d63f58fd72cd798fcfaf6af47
[INFO] running `"docker" "start" "-a" "df280850feadbeb39cb1a8ab2ad43d4c9d54811d63f58fd72cd798fcfaf6af47"`
[INFO] [stderr]    Compiling rust-samples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `src` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut src = String::new();
[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: value assigned to `string` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut string = String::new();
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `"docker" "inspect" "df280850feadbeb39cb1a8ab2ad43d4c9d54811d63f58fd72cd798fcfaf6af47"`
[INFO] running `"docker" "rm" "-f" "df280850feadbeb39cb1a8ab2ad43d4c9d54811d63f58fd72cd798fcfaf6af47"`
[INFO] [stdout] df280850feadbeb39cb1a8ab2ad43d4c9d54811d63f58fd72cd798fcfaf6af47
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/waku-waku/rust-samples:/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] 4d8528ba1617d65676fc303a4719ab1206c0285e328c6ae72790f8b7481ad95a
[INFO] running `"docker" "start" "-a" "4d8528ba1617d65676fc303a4719ab1206c0285e328c6ae72790f8b7481ad95a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mrf-c5cf90a6dda056c6
[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] [stderr]      Running /opt/crater/target/debug/deps/sample_create_file-81f2331ea5cb7ce4
[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] [stderr]      Running /opt/crater/target/debug/deps/sample_fizzbuzz-5d23d277ec982b70
[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] [stderr]      Running /opt/crater/target/debug/deps/sample_input-4cee4a8daba41f28
[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] [stderr]      Running /opt/crater/target/debug/deps/sample_let-75656a7cdd482ca8
[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] [stderr]      Running /opt/crater/target/debug/deps/sample_square_sum-5d2ab2b6359846a9
[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" "4d8528ba1617d65676fc303a4719ab1206c0285e328c6ae72790f8b7481ad95a"`
[INFO] running `"docker" "rm" "-f" "4d8528ba1617d65676fc303a4719ab1206c0285e328c6ae72790f8b7481ad95a"`
[INFO] [stdout] 4d8528ba1617d65676fc303a4719ab1206c0285e328c6ae72790f8b7481ad95a