[INFO] crate promises 0.2.0 is already in cache
[INFO] extracting crate promises 0.2.0 into work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/promises/0.2.0
[INFO] extracting crate promises 0.2.0 into work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/promises/0.2.0
[INFO] validating manifest of promises-0.2.0 on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of promises-0.2.0 on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing promises-0.2.0
[INFO] finished frobbing promises-0.2.0
[INFO] frobbed toml for promises-0.2.0 written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/promises/0.2.0/Cargo.toml
[INFO] started frobbing promises-0.2.0
[INFO] finished frobbing promises-0.2.0
[INFO] frobbed toml for promises-0.2.0 written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/promises/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking promises-0.2.0 against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/promises/0.2.0:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c8be41c1d8fd57d65cf806395786022010ff351e07db04b266bc735e1b5663d1
[INFO] running `"docker" "start" "-a" "c8be41c1d8fd57d65cf806395786022010ff351e07db04b266bc735e1b5663d1"`
[INFO] [stderr]     Checking promises v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/tests.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]   --> src/tests.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |         Ok(file) => println!("Created a file!"),
[INFO] [stderr]    |            ^^^^ help: consider using `_file` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/tests.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let p: Promise<(), ()> = Promise::new(|| {
[INFO] [stderr]    |         ^ help: consider using `_p` instead
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_file`
[INFO] [stderr]   --> src/tests.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn create_file() -> Result<File, io::Error> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "c8be41c1d8fd57d65cf806395786022010ff351e07db04b266bc735e1b5663d1"`
[INFO] running `"docker" "rm" "-f" "c8be41c1d8fd57d65cf806395786022010ff351e07db04b266bc735e1b5663d1"`
[INFO] [stdout] c8be41c1d8fd57d65cf806395786022010ff351e07db04b266bc735e1b5663d1