[INFO] crate discrete 0.2.1 is already in cache
[INFO] extracting crate discrete 0.2.1 into work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/discrete/0.2.1
[INFO] extracting crate discrete 0.2.1 into work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/discrete/0.2.1
[INFO] validating manifest of discrete-0.2.1 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of discrete-0.2.1 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing discrete-0.2.1
[INFO] finished frobbing discrete-0.2.1
[INFO] frobbed toml for discrete-0.2.1 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/discrete/0.2.1/Cargo.toml
[INFO] started frobbing discrete-0.2.1
[INFO] finished frobbing discrete-0.2.1
[INFO] frobbed toml for discrete-0.2.1 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/discrete/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking discrete-0.2.1 against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/discrete/0.2.1:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 784439a893c784d5941b8008fa118464e700d2f64c6435c04b882d0eef67d4de
[INFO] running `"docker" "start" "-a" "784439a893c784d5941b8008fa118464e700d2f64c6435c04b882d0eef67d4de"`
[INFO] [stderr]     Checking discrete v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 190 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:272:17
[INFO] [stderr]     |
[INFO] [stderr] 272 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 290 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 190 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:272:17
[INFO] [stderr]     |
[INFO] [stderr] 272 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 290 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `"docker" "inspect" "784439a893c784d5941b8008fa118464e700d2f64c6435c04b882d0eef67d4de"`
[INFO] running `"docker" "rm" "-f" "784439a893c784d5941b8008fa118464e700d2f64c6435c04b882d0eef67d4de"`
[INFO] [stdout] 784439a893c784d5941b8008fa118464e700d2f64c6435c04b882d0eef67d4de