[INFO] crate cargo-modules 0.4.4 is already in cache
[INFO] extracting crate cargo-modules 0.4.4 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/cargo-modules/0.4.4
[INFO] extracting crate cargo-modules 0.4.4 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/cargo-modules/0.4.4
[INFO] validating manifest of cargo-modules-0.4.4 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cargo-modules-0.4.4 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cargo-modules-0.4.4
[INFO] finished frobbing cargo-modules-0.4.4
[INFO] frobbed toml for cargo-modules-0.4.4 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/cargo-modules/0.4.4/Cargo.toml
[INFO] started frobbing cargo-modules-0.4.4
[INFO] finished frobbing cargo-modules-0.4.4
[INFO] frobbed toml for cargo-modules-0.4.4 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/cargo-modules/0.4.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cargo-modules-0.4.4 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-7/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/cargo-modules/0.4.4:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 157d47255accdfe4cac1201551dc44cd283138995fd3373c9d3ccad14c6f0e53
[INFO] running `"docker" "start" "-a" "157d47255accdfe4cac1201551dc44cd283138995fd3373c9d3ccad14c6f0e53"`
[INFO] [stderr]    Compiling rustc-rayon-core v0.1.2
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling rustc-rayon v0.1.2
[INFO] [stderr]     Checking rustc-ap-graphviz v373.0.0
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling rustc-ap-rustc_target v373.0.0
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]    Compiling rustc-ap-syntax v373.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking ena v0.11.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking rustc-ap-serialize v373.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_cratesio_shim v373.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking winconsole v0.10.0
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v373.0.0
[INFO] [stderr]     Checking rustc-ap-arena v373.0.0
[INFO] [stderr]     Checking rustc-ap-syntax_pos v373.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v373.0.0
[INFO] [stderr]     Checking cargo-modules v0.4.4 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:184:17
[INFO] [stderr]     |
[INFO] [stderr] 184 |             let mut prefix = if use_tree.prefix.segments.is_empty() {
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:184:17
[INFO] [stderr]     |
[INFO] [stderr] 184 |             let mut prefix = if use_tree.prefix.segments.is_empty() {
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.28s
[INFO] running `"docker" "inspect" "157d47255accdfe4cac1201551dc44cd283138995fd3373c9d3ccad14c6f0e53"`
[INFO] running `"docker" "rm" "-f" "157d47255accdfe4cac1201551dc44cd283138995fd3373c9d3ccad14c6f0e53"`
[INFO] [stdout] 157d47255accdfe4cac1201551dc44cd283138995fd3373c9d3ccad14c6f0e53