[INFO] updating cached repository gihub-zuoyan/rust-study
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gihub-zuoyan/rust-study
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gihub-zuoyan/rust-study" "work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gihub-zuoyan/rust-study" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gihub-zuoyan/rust-study"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gihub-zuoyan/rust-study'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4a66ea9919bd32719017b8b00a022cb1a2d87e64
[INFO] sha for GitHub repo gihub-zuoyan/rust-study: 4a66ea9919bd32719017b8b00a022cb1a2d87e64
[INFO] validating manifest of gihub-zuoyan/rust-study 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 gihub-zuoyan/rust-study 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 gihub-zuoyan/rust-study
[INFO] finished frobbing gihub-zuoyan/rust-study
[INFO] frobbed toml for gihub-zuoyan/rust-study written to work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study/Cargo.toml
[INFO] started frobbing gihub-zuoyan/rust-study
[INFO] finished frobbing gihub-zuoyan/rust-study
[INFO] frobbed toml for gihub-zuoyan/rust-study written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gihub-zuoyan/rust-study/Cargo.toml
[INFO] crate gihub-zuoyan/rust-study 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]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 gihub-zuoyan/rust-study 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study:/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] 8ffc42ff354a0fb918b637a0e70f1de73182743b24a6968d8c8cf70d06e133ee
[INFO] running `"docker" "start" "-a" "8ffc42ff354a0fb918b637a0e70f1de73182743b24a6968d8c8cf70d06e133ee"`
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MAX`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     const MAX : u32 = 100;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "8ffc42ff354a0fb918b637a0e70f1de73182743b24a6968d8c8cf70d06e133ee"`
[INFO] running `"docker" "rm" "-f" "8ffc42ff354a0fb918b637a0e70f1de73182743b24a6968d8c8cf70d06e133ee"`
[INFO] [stdout] 8ffc42ff354a0fb918b637a0e70f1de73182743b24a6968d8c8cf70d06e133ee
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study:/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] f0eda40de6b6ca134f0b4a99e55a910be89841064ab31caeb3c332e74b930ee3
[INFO] running `"docker" "start" "-a" "f0eda40de6b6ca134f0b4a99e55a910be89841064ab31caeb3c332e74b930ee3"`
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "f0eda40de6b6ca134f0b4a99e55a910be89841064ab31caeb3c332e74b930ee3"`
[INFO] running `"docker" "rm" "-f" "f0eda40de6b6ca134f0b4a99e55a910be89841064ab31caeb3c332e74b930ee3"`
[INFO] [stdout] f0eda40de6b6ca134f0b4a99e55a910be89841064ab31caeb3c332e74b930ee3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gihub-zuoyan/rust-study:/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] 526ae09dfd8ca7eac000c5f21af94869576113aa1575fcbf8476e857f08db373
[INFO] running `"docker" "start" "-a" "526ae09dfd8ca7eac000c5f21af94869576113aa1575fcbf8476e857f08db373"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_demo-632c815474b4f7ba
[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" "526ae09dfd8ca7eac000c5f21af94869576113aa1575fcbf8476e857f08db373"`
[INFO] running `"docker" "rm" "-f" "526ae09dfd8ca7eac000c5f21af94869576113aa1575fcbf8476e857f08db373"`
[INFO] [stdout] 526ae09dfd8ca7eac000c5f21af94869576113aa1575fcbf8476e857f08db373