[INFO] crate twiggy-opt 0.5.0 is already in cache
[INFO] extracting crate twiggy-opt 0.5.0 into work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/reg/twiggy-opt/0.5.0
[INFO] extracting crate twiggy-opt 0.5.0 into work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/twiggy-opt/0.5.0
[INFO] validating manifest of twiggy-opt-0.5.0 on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of twiggy-opt-0.5.0 on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing twiggy-opt-0.5.0
[INFO] finished frobbing twiggy-opt-0.5.0
[INFO] frobbed toml for twiggy-opt-0.5.0 written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/reg/twiggy-opt/0.5.0/Cargo.toml
[INFO] started frobbing twiggy-opt-0.5.0
[INFO] finished frobbing twiggy-opt-0.5.0
[INFO] frobbed toml for twiggy-opt-0.5.0 written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/twiggy-opt/0.5.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking twiggy-opt-0.5.0 against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-3/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/twiggy-opt/0.5.0:/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=forbid" "-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" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4a8870409fbb5e61e177355ede5b8a130973a0b3fcafdf5ae01575904c406213
[INFO] running `"docker" "start" "-a" "4a8870409fbb5e61e177355ede5b8a130973a0b3fcafdf5ae01575904c406213"`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking twiggy-traits v0.5.0
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]    Compiling twiggy-opt v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:235:46
[INFO] [stderr]     |
[INFO] [stderr] 235 |             pub fn open(&self) -> Result<Box<io::Write>, traits::Error> {
[INFO] [stderr]     |                                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:238:86
[INFO] [stderr]     |
[INFO] [stderr] 238 |                         Box::new(io::BufWriter::new(fs::File::create(path)?)) as Box<io::Write>
[INFO] [stderr]     |                                                                                      ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:240:80
[INFO] [stderr]     |
[INFO] [stderr] 240 |                     OutputDestination::Stdout => Box::new(io::stdout()) as Box<io::Write>,
[INFO] [stderr]     |                                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:235:46
[INFO] [stderr]     |
[INFO] [stderr] 235 |             pub fn open(&self) -> Result<Box<io::Write>, traits::Error> {
[INFO] [stderr]     |                                              ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:238:86
[INFO] [stderr]     |
[INFO] [stderr] 238 |                         Box::new(io::BufWriter::new(fs::File::create(path)?)) as Box<io::Write>
[INFO] [stderr]     |                                                                                      ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> opt.rs:240:80
[INFO] [stderr]     |
[INFO] [stderr] 240 |                     OutputDestination::Stdout => Box::new(io::stdout()) as Box<io::Write>,
[INFO] [stderr]     |                                                                                ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.18s
[INFO] running `"docker" "inspect" "4a8870409fbb5e61e177355ede5b8a130973a0b3fcafdf5ae01575904c406213"`
[INFO] running `"docker" "rm" "-f" "4a8870409fbb5e61e177355ede5b8a130973a0b3fcafdf5ae01575904c406213"`
[INFO] [stdout] 4a8870409fbb5e61e177355ede5b8a130973a0b3fcafdf5ae01575904c406213