Dec 17 14:56:23.723 INFO checking spebern/poc1to2 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 14:56:23.723 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/spebern/poc1to2:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 14:56:24.154 INFO [stdout] 40a05e0aff1a69218a6f05e56fbb946b2887ab8a63a0a74077c5574c65f72074
Dec 17 14:56:24.158 INFO running `"docker" "start" "-a" "40a05e0aff1a69218a6f05e56fbb946b2887ab8a63a0a74077c5574c65f72074"`
Dec 17 14:56:25.940 INFO [stderr]     Checking clap v2.30.0
Dec 17 14:56:30.456 INFO [stderr]     Checking poc1to2 v0.1.0 (/opt/crater/workdir)
Dec 17 14:56:30.988 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 14:56:30.988 INFO [stderr]    --> src/main.rs:175:9
Dec 17 14:56:30.988 INFO [stderr]     |
Dec 17 14:56:30.988 INFO [stderr] 175 |         fs::copy(plot_file.to_owned() + ".orig", plot_file);
Dec 17 14:56:30.988 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:56:30.988 INFO [stderr]     |
Dec 17 14:56:30.988 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 14:56:30.988 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 14:56:30.988 INFO [stderr] 
Dec 17 14:56:30.988 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 14:56:30.988 INFO [stderr]    --> src/main.rs:189:9
Dec 17 14:56:30.988 INFO [stderr]     |
Dec 17 14:56:30.988 INFO [stderr] 189 |         File::open(&poc2_plot_file).unwrap().read_to_end(&mut buffer);
Dec 17 14:56:30.988 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:56:30.988 INFO [stderr]     |
Dec 17 14:56:30.988 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 14:56:30.988 INFO [stderr] 
Dec 17 14:56:30.989 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 14:56:30.989 INFO [stderr]    --> src/main.rs:194:9
Dec 17 14:56:30.989 INFO [stderr]     |
Dec 17 14:56:30.989 INFO [stderr] 194 |         fs::remove_file(&poc2_plot_file);
Dec 17 14:56:30.989 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:56:30.989 INFO [stderr]     |
Dec 17 14:56:30.989 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 14:56:30.989 INFO [stderr] 
Dec 17 14:56:31.040 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.17s
Dec 17 14:56:31.504 INFO running `"docker" "inspect" "40a05e0aff1a69218a6f05e56fbb946b2887ab8a63a0a74077c5574c65f72074"`
Dec 17 14:56:31.789 INFO running `"docker" "rm" "-f" "40a05e0aff1a69218a6f05e56fbb946b2887ab8a63a0a74077c5574c65f72074"`
Dec 17 14:56:31.931 INFO [stdout] 40a05e0aff1a69218a6f05e56fbb946b2887ab8a63a0a74077c5574c65f72074