[INFO] updating cached repository BarlowDu/rust-lang
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/BarlowDu/rust-lang
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/BarlowDu/rust-lang" "work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/BarlowDu/rust-lang" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BarlowDu/rust-lang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BarlowDu/rust-lang'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3263b548bf23e2354feead422490f223480ffac7
[INFO] sha for GitHub repo BarlowDu/rust-lang: 3263b548bf23e2354feead422490f223480ffac7
[INFO] validating manifest of BarlowDu/rust-lang 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 BarlowDu/rust-lang 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 BarlowDu/rust-lang
[INFO] finished frobbing BarlowDu/rust-lang
[INFO] frobbed toml for BarlowDu/rust-lang written to work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang/Cargo.toml
[INFO] started frobbing BarlowDu/rust-lang
[INFO] finished frobbing BarlowDu/rust-lang
[INFO] frobbed toml for BarlowDu/rust-lang written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BarlowDu/rust-lang/Cargo.toml
[INFO] crate BarlowDu/rust-lang 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 BarlowDu/rust-lang 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang:/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] a8e9e8b1f50125b2f3c17ea95b5b24d7b45f59a640c87e0da0e69f8bffe7e74b
[INFO] running `"docker" "start" "-a" "a8e9e8b1f50125b2f3c17ea95b5b24d7b45f59a640c87e0da0e69f8bffe7e74b"`
[INFO] [stderr]    Compiling rust-lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/module/ienum.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |         Ok(t)=>println!("result match t"),
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/module/ienum.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Err(e)=>println!("result match none")
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/module/ienum.rs:33:14
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Some(t)=>println!("option match t"),
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/module/iborrow.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut s=String::from("rust language");
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/module/ilifetime.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     id:i32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]   --> src/module/ilifetime.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     name:&'a str
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "a8e9e8b1f50125b2f3c17ea95b5b24d7b45f59a640c87e0da0e69f8bffe7e74b"`
[INFO] running `"docker" "rm" "-f" "a8e9e8b1f50125b2f3c17ea95b5b24d7b45f59a640c87e0da0e69f8bffe7e74b"`
[INFO] [stdout] a8e9e8b1f50125b2f3c17ea95b5b24d7b45f59a640c87e0da0e69f8bffe7e74b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang:/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] 822a76715659d3b1d45905ba2155e911e575699edae8f38a5d39be0e26c4c1e3
[INFO] running `"docker" "start" "-a" "822a76715659d3b1d45905ba2155e911e575699edae8f38a5d39be0e26c4c1e3"`
[INFO] [stderr]    Compiling rust-lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/module/ienum.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |         Ok(t)=>println!("result match t"),
[INFO] [stderr]    |            ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/module/ienum.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Err(e)=>println!("result match none")
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/module/ienum.rs:33:14
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Some(t)=>println!("option match t"),
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/module/iborrow.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut s=String::from("rust language");
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `id`
[INFO] [stderr]   --> src/module/ilifetime.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     id:i32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]   --> src/module/ilifetime.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     name:&'a str
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "822a76715659d3b1d45905ba2155e911e575699edae8f38a5d39be0e26c4c1e3"`
[INFO] running `"docker" "rm" "-f" "822a76715659d3b1d45905ba2155e911e575699edae8f38a5d39be0e26c4c1e3"`
[INFO] [stdout] 822a76715659d3b1d45905ba2155e911e575699edae8f38a5d39be0e26c4c1e3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BarlowDu/rust-lang:/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] 4f679225f9e8907cc9ccd288ff55101d44fe2f69d67108acdf22dd3a7f7f27dd
[INFO] running `"docker" "start" "-a" "4f679225f9e8907cc9ccd288ff55101d44fe2f69d67108acdf22dd3a7f7f27dd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_lang-e885a07c9c58dbdd
[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" "4f679225f9e8907cc9ccd288ff55101d44fe2f69d67108acdf22dd3a7f7f27dd"`
[INFO] running `"docker" "rm" "-f" "4f679225f9e8907cc9ccd288ff55101d44fe2f69d67108acdf22dd3a7f7f27dd"`
[INFO] [stdout] 4f679225f9e8907cc9ccd288ff55101d44fe2f69d67108acdf22dd3a7f7f27dd