[INFO] updating cached repository maiso/RustCursus
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/maiso/RustCursus
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/maiso/RustCursus" "work/ex/beta-1.37-6/sources/1.36.0/gh/maiso/RustCursus"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/maiso/RustCursus'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/maiso/RustCursus" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 581e5238a37133894c462e1774150ffe6b4b421c
[INFO] sha for GitHub repo maiso/RustCursus: 581e5238a37133894c462e1774150ffe6b4b421c
[INFO] validating manifest of maiso/RustCursus 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 maiso/RustCursus 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 maiso/RustCursus
[INFO] finished frobbing maiso/RustCursus
[INFO] frobbed toml for maiso/RustCursus written to work/ex/beta-1.37-6/sources/1.36.0/gh/maiso/RustCursus/Cargo.toml
[INFO] started frobbing maiso/RustCursus
[INFO] finished frobbing maiso/RustCursus
[INFO] frobbed toml for maiso/RustCursus written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus/Cargo.toml
[INFO] crate maiso/RustCursus 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing maiso/RustCursus against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b48d7d514d60c202a56981dacb0a1467aeebc693c4f49e70ab6b6a501705f313
[INFO] running `"docker" "start" "-a" "b48d7d514d60c202a56981dacb0a1467aeebc693c4f49e70ab6b6a501705f313"`
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling wait-timeout v0.1.5
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling tempfile v3.0.5
[INFO] [stderr]    Compiling rusty-fork v0.2.1
[INFO] [stderr]    Compiling proptest v0.8.7
[INFO] [stderr]    Compiling queue v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/main.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Read, Write };
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/main.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, BufReader};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:65:38
[INFO] [stderr]    |
[INFO] [stderr] 65 |         MyCommand::InvalidCommand{reason : x} => {
[INFO] [stderr]    |                                            ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:68:40
[INFO] [stderr]    |
[INFO] [stderr] 68 |         MyCommand::InvalidParameter{reason : x} => {
[INFO] [stderr]    |                                              ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.90s
[INFO] running `"docker" "inspect" "b48d7d514d60c202a56981dacb0a1467aeebc693c4f49e70ab6b6a501705f313"`
[INFO] running `"docker" "rm" "-f" "b48d7d514d60c202a56981dacb0a1467aeebc693c4f49e70ab6b6a501705f313"`
[INFO] [stdout] b48d7d514d60c202a56981dacb0a1467aeebc693c4f49e70ab6b6a501705f313
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6001b3252e1299d34f21406e6f45c37dcd3d5a5b739d55ecc191d6b0494c3120
[INFO] running `"docker" "start" "-a" "6001b3252e1299d34f21406e6f45c37dcd3d5a5b739d55ecc191d6b0494c3120"`
[INFO] [stderr]    Compiling queue v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/main.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Read, Write };
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]  --> src/main.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{self, BufReader};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:65:38
[INFO] [stderr]    |
[INFO] [stderr] 65 |         MyCommand::InvalidCommand{reason : x} => {
[INFO] [stderr]    |                                            ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:68:40
[INFO] [stderr]    |
[INFO] [stderr] 68 |         MyCommand::InvalidParameter{reason : x} => {
[INFO] [stderr]    |                                              ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.39s
[INFO] running `"docker" "inspect" "6001b3252e1299d34f21406e6f45c37dcd3d5a5b739d55ecc191d6b0494c3120"`
[INFO] running `"docker" "rm" "-f" "6001b3252e1299d34f21406e6f45c37dcd3d5a5b739d55ecc191d6b0494c3120"`
[INFO] [stdout] 6001b3252e1299d34f21406e6f45c37dcd3d5a5b739d55ecc191d6b0494c3120
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/maiso/RustCursus:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] f2f5ee6530518a7914dc7ae2df3cf8def5b3b751af79c9f3cf2ad12c50533380
[INFO] running `"docker" "start" "-a" "f2f5ee6530518a7914dc7ae2df3cf8def5b3b751af79c9f3cf2ad12c50533380"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/queue-ea58d2307d86eef1
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::doesnt_crash ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f2f5ee6530518a7914dc7ae2df3cf8def5b3b751af79c9f3cf2ad12c50533380"`
[INFO] running `"docker" "rm" "-f" "f2f5ee6530518a7914dc7ae2df3cf8def5b3b751af79c9f3cf2ad12c50533380"`
[INFO] [stdout] f2f5ee6530518a7914dc7ae2df3cf8def5b3b751af79c9f3cf2ad12c50533380