[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 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] c4b8eeb759200a3217883cc03b03db375709a986874884d42d9d3829fc12142e
[INFO] running `"docker" "start" "-a" "c4b8eeb759200a3217883cc03b03db375709a986874884d42d9d3829fc12142e"`
[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 21.27s
[INFO] running `"docker" "inspect" "c4b8eeb759200a3217883cc03b03db375709a986874884d42d9d3829fc12142e"`
[INFO] running `"docker" "rm" "-f" "c4b8eeb759200a3217883cc03b03db375709a986874884d42d9d3829fc12142e"`
[INFO] [stdout] c4b8eeb759200a3217883cc03b03db375709a986874884d42d9d3829fc12142e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 319929ae7c39e737e8f0ccaef38583b85a0a640c88f2ade7c7ddc561a416091d
[INFO] running `"docker" "start" "-a" "319929ae7c39e737e8f0ccaef38583b85a0a640c88f2ade7c7ddc561a416091d"`
[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 2.55s
[INFO] running `"docker" "inspect" "319929ae7c39e737e8f0ccaef38583b85a0a640c88f2ade7c7ddc561a416091d"`
[INFO] running `"docker" "rm" "-f" "319929ae7c39e737e8f0ccaef38583b85a0a640c88f2ade7c7ddc561a416091d"`
[INFO] [stdout] 319929ae7c39e737e8f0ccaef38583b85a0a640c88f2ade7c7ddc561a416091d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] f2dac33d166eb745210454b5de09877120534ac00c62b538752302f37946e768
[INFO] running `"docker" "start" "-a" "f2dac33d166eb745210454b5de09877120534ac00c62b538752302f37946e768"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/queue-b4fec145928d5fda
[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" "f2dac33d166eb745210454b5de09877120534ac00c62b538752302f37946e768"`
[INFO] running `"docker" "rm" "-f" "f2dac33d166eb745210454b5de09877120534ac00c62b538752302f37946e768"`
[INFO] [stdout] f2dac33d166eb745210454b5de09877120534ac00c62b538752302f37946e768