[INFO] crate backtracking_iterator 0.4.3 is already in cache
[INFO] extracting crate backtracking_iterator 0.4.3 into work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/backtracking_iterator/0.4.3
[INFO] extracting crate backtracking_iterator 0.4.3 into work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/backtracking_iterator/0.4.3
[INFO] validating manifest of backtracking_iterator-0.4.3 on toolchain master#efe2f32a6b8217425f361ec7c206910c611c03ee
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of backtracking_iterator-0.4.3 on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing backtracking_iterator-0.4.3
[INFO] finished frobbing backtracking_iterator-0.4.3
[INFO] frobbed toml for backtracking_iterator-0.4.3 written to work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/backtracking_iterator/0.4.3/Cargo.toml
[INFO] started frobbing backtracking_iterator-0.4.3
[INFO] finished frobbing backtracking_iterator-0.4.3
[INFO] frobbed toml for backtracking_iterator-0.4.3 written to work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/reg/backtracking_iterator/0.4.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking backtracking_iterator-0.4.3 against master#efe2f32a6b8217425f361ec7c206910c611c03ee for pr-60039
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039/worker-2/master#efe2f32a6b8217425f361ec7c206910c611c03ee:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/reg/backtracking_iterator/0.4.3:/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" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] dd9823c44f7d54fff371556d2142d2535286674993a55a3f595303f75b173402
[INFO] running `"docker" "start" "-a" "dd9823c44f7d54fff371556d2142d2535286674993a55a3f595303f75b173402"`
[INFO] [stderr]     Checking backtracking_iterator v0.4.3 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Backtracking` is imported redundantly
[INFO] [stderr]   --> src/copying.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Backtracking` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 38 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Progressing` is imported redundantly
[INFO] [stderr]   --> src/copying.rs:38:31
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Progressing` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 38 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Backtracking` is imported redundantly
[INFO] [stderr]   --> src/referencing.rs:57:17
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Backtracking` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 57 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Progressing` is imported redundantly
[INFO] [stderr]   --> src/referencing.rs:57:31
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Progressing` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 57 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BacktrackingState`
[INFO] [stderr]   --> src/concurrent.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 | use super::{BacktrackingState};
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Backtracking`, `Progressing`
[INFO] [stderr]   --> src/concurrent.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Backtracking` is imported redundantly
[INFO] [stderr]   --> src/copying.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Backtracking` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 38 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Progressing` is imported redundantly
[INFO] [stderr]   --> src/copying.rs:38:31
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Progressing` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 38 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Backtracking` is imported redundantly
[INFO] [stderr]   --> src/referencing.rs:57:17
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Backtracking` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 57 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Progressing` is imported redundantly
[INFO] [stderr]   --> src/referencing.rs:57:31
[INFO] [stderr]    |
[INFO] [stderr] 23 | use super::BacktrackingState::*;
[INFO] [stderr]    |     --------------------------- the item `Progressing` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 57 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BacktrackingState`
[INFO] [stderr]   --> src/concurrent.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 | use super::{BacktrackingState};
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Backtracking`, `Progressing`
[INFO] [stderr]   --> src/concurrent.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |     use crate::{Backtracking, Progressing};
[INFO] [stderr]    |                 ^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `"docker" "inspect" "dd9823c44f7d54fff371556d2142d2535286674993a55a3f595303f75b173402"`
[INFO] running `"docker" "rm" "-f" "dd9823c44f7d54fff371556d2142d2535286674993a55a3f595303f75b173402"`
[INFO] [stdout] dd9823c44f7d54fff371556d2142d2535286674993a55a3f595303f75b173402