[INFO] updating cached repository studoot/duplicate-finder
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/studoot/duplicate-finder
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/studoot/duplicate-finder" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/studoot/duplicate-finder"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/studoot/duplicate-finder'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/studoot/duplicate-finder" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/studoot/duplicate-finder"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/studoot/duplicate-finder'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f1871cb936f41bd21be38188189a825341f7f239
[INFO] sha for GitHub repo studoot/duplicate-finder: f1871cb936f41bd21be38188189a825341f7f239
[INFO] validating manifest of studoot/duplicate-finder on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of studoot/duplicate-finder on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing studoot/duplicate-finder
[INFO] finished frobbing studoot/duplicate-finder
[INFO] frobbed toml for studoot/duplicate-finder written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/studoot/duplicate-finder/Cargo.toml
[INFO] started frobbing studoot/duplicate-finder
[INFO] finished frobbing studoot/duplicate-finder
[INFO] frobbed toml for studoot/duplicate-finder written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/studoot/duplicate-finder/Cargo.toml
[INFO] crate studoot/duplicate-finder already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking studoot/duplicate-finder against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-2/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/studoot/duplicate-finder:/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" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 775060d46ae7a647553d1ea477e24a4776ffe74da3e449910f349b6be9eb27ff
[INFO] running `"docker" "start" "-a" "775060d46ae7a647553d1ea477e24a4776ffe74da3e449910f349b6be9eb27ff"`
[INFO] [stderr]     Checking libc v0.2.31
[INFO] [stderr]     Checking either v1.2.0
[INFO] [stderr]     Checking same-file v0.1.3
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]    Compiling structopt-derive v0.1.1
[INFO] [stderr]     Checking walkdir v1.0.7
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking textwrap v0.8.0
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking clap v2.26.2
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking rayon-core v1.2.1
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking globset v0.2.0
[INFO] [stderr]     Checking ignore v0.2.2
[INFO] [stderr]     Checking multimap v0.4.0
[INFO] [stderr]     Checking structopt v0.1.1
[INFO] [stderr]     Checking duplicate-finder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `outputter`
[INFO] [stderr]   --> src/main.rs:92:13
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let outputter = get_outputter(opts.output_type);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_outputter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]  --> src/output/csv.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                      ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]  --> src/output/csv.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                                          ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]  --> src/output/json.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                      ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]  --> src/output/json.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                                          ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `outputter`
[INFO] [stderr]   --> src/main.rs:92:13
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let outputter = get_outputter(opts.output_type);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_outputter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]  --> src/output/csv.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                      ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]  --> src/output/csv.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                                          ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]  --> src/output/json.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                      ^^^^^^ help: consider prefixing with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]  --> src/output/json.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn output(&self, stream: &mut Write, d : &Duplicates) -> () {
[INFO] [stderr]   |                                          ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `attr_literals` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(attr_literals, rustc_private)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `attr_literals` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(attr_literals, rustc_private)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.64s
[INFO] running `"docker" "inspect" "775060d46ae7a647553d1ea477e24a4776ffe74da3e449910f349b6be9eb27ff"`
[INFO] running `"docker" "rm" "-f" "775060d46ae7a647553d1ea477e24a4776ffe74da3e449910f349b6be9eb27ff"`
[INFO] [stdout] 775060d46ae7a647553d1ea477e24a4776ffe74da3e449910f349b6be9eb27ff