[INFO] crate roaring 0.5.2 is already in cache
[INFO] extracting crate roaring 0.5.2 into work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/roaring/0.5.2
[INFO] extracting crate roaring 0.5.2 into work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/roaring/0.5.2
[INFO] validating manifest of roaring-0.5.2 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 roaring-0.5.2 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 roaring-0.5.2
[INFO] finished frobbing roaring-0.5.2
[INFO] frobbed toml for roaring-0.5.2 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/roaring/0.5.2/Cargo.toml
[INFO] started frobbing roaring-0.5.2
[INFO] finished frobbing roaring-0.5.2
[INFO] frobbed toml for roaring-0.5.2 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/roaring/0.5.2/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] checking roaring-0.5.2 against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-6/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/roaring/0.5.2:/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] 8aeb12e01268ce1e3c66060cf3b8aecad7480b70c66c72aba14a42ed5cdc3dd4
[INFO] running `"docker" "start" "-a" "8aeb12e01268ce1e3c66060cf3b8aecad7480b70c66c72aba14a42ed5cdc3dd4"`
[INFO] [stderr]     Checking roaring v0.5.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/bitmap/iter.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/bitmap/iter.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/treemap/iter.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 97 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]    --> src/treemap/iter.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/bitmap/iter.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/bitmap/iter.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]   --> src/treemap/iter.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 97 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::saturating_sub` that must be used
[INFO] [stderr]    --> src/treemap/iter.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         self.size_hint.saturating_sub(1);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.73s
[INFO] running `"docker" "inspect" "8aeb12e01268ce1e3c66060cf3b8aecad7480b70c66c72aba14a42ed5cdc3dd4"`
[INFO] running `"docker" "rm" "-f" "8aeb12e01268ce1e3c66060cf3b8aecad7480b70c66c72aba14a42ed5cdc3dd4"`
[INFO] [stdout] 8aeb12e01268ce1e3c66060cf3b8aecad7480b70c66c72aba14a42ed5cdc3dd4