[INFO] updating cached repository icasdri/ren
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/icasdri/ren
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/icasdri/ren" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/icasdri/ren"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/icasdri/ren'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/icasdri/ren" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/icasdri/ren"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/icasdri/ren'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0a61c18a455411552651bac11842b8883ea544c4
[INFO] sha for GitHub repo icasdri/ren: 0a61c18a455411552651bac11842b8883ea544c4
[INFO] validating manifest of icasdri/ren on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of icasdri/ren on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing icasdri/ren
[INFO] finished frobbing icasdri/ren
[INFO] frobbed toml for icasdri/ren written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/icasdri/ren/Cargo.toml
[INFO] started frobbing icasdri/ren
[INFO] finished frobbing icasdri/ren
[INFO] frobbed toml for icasdri/ren written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/icasdri/ren/Cargo.toml
[INFO] crate icasdri/ren already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/icasdri/ren/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking icasdri/ren against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-7/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/icasdri/ren:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5d9b1c3c02f38ff931ddc29d7737091ac5658d2406ae09d3f5e7ed81eeb4fcc7
[INFO] running `"docker" "start" "-a" "5d9b1c3c02f38ff931ddc29d7737091ac5658d2406ae09d3f5e7ed81eeb4fcc7"`
[INFO] [stderr]     Checking ren v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `renamer::Renamer`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use renamer::Renamer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source_pattern`
[INFO] [stderr]   --> src/renamer.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_source_pattern`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `target_pattern`
[INFO] [stderr]   --> src/renamer.rs:12:36
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_target_pattern`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `delim`
[INFO] [stderr]   --> src/renamer.rs:12:60
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |                                                            ^^^^^ help: consider prefixing with an underscore: `_delim`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/renamer.rs:45:38
[INFO] [stderr]    |
[INFO] [stderr] 45 |                            .map_err(|e| PatternErr { message: "failed to compile grouped regex".to_owned() }));
[INFO] [stderr]    |                                      ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/renamer.rs:47:34
[INFO] [stderr]    |
[INFO] [stderr] 47 |                        .map_err(|e| PatternErr { message: "failed to compile regex set".to_owned() }));
[INFO] [stderr]    |                                  ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `decompose_source`
[INFO] [stderr]   --> src/renamer.rs:80:17
[INFO] [stderr]    |
[INFO] [stderr] 80 |     use super::{decompose_source};
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `renamer::Renamer`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use renamer::Renamer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Renamer`
[INFO] [stderr]  --> src/renamer.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Renamer {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/renamer.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SourcePattern`
[INFO] [stderr]   --> src/renamer.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct SourcePattern {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `PatternErr`
[INFO] [stderr]   --> src/renamer.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | struct PatternErr {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/renamer.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn new(source_pattern: String, delim: char) -> Result<SourcePattern, PatternErr> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decompose_source`
[INFO] [stderr]   --> src/renamer.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn decompose_source(source_pattern: String, delim: char) -> Result<(String, Vec<String>, String), String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source_pattern`
[INFO] [stderr]   --> src/renamer.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_source_pattern`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `target_pattern`
[INFO] [stderr]   --> src/renamer.rs:12:36
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_target_pattern`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `delim`
[INFO] [stderr]   --> src/renamer.rs:12:60
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |                                                            ^^^^^ help: consider prefixing with an underscore: `_delim`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/renamer.rs:45:38
[INFO] [stderr]    |
[INFO] [stderr] 45 |                            .map_err(|e| PatternErr { message: "failed to compile grouped regex".to_owned() }));
[INFO] [stderr]    |                                      ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/renamer.rs:47:34
[INFO] [stderr]    |
[INFO] [stderr] 47 |                        .map_err(|e| PatternErr { message: "failed to compile regex set".to_owned() }));
[INFO] [stderr]    |                                  ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Renamer`
[INFO] [stderr]  --> src/renamer.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Renamer {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/renamer.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(source_pattern: String, target_pattern: String, delim: char) -> Renamer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SourcePattern`
[INFO] [stderr]   --> src/renamer.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct SourcePattern {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `PatternErr`
[INFO] [stderr]   --> src/renamer.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | struct PatternErr {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/renamer.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn new(source_pattern: String, delim: char) -> Result<SourcePattern, PatternErr> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "5d9b1c3c02f38ff931ddc29d7737091ac5658d2406ae09d3f5e7ed81eeb4fcc7"`
[INFO] running `"docker" "rm" "-f" "5d9b1c3c02f38ff931ddc29d7737091ac5658d2406ae09d3f5e7ed81eeb4fcc7"`
[INFO] [stdout] 5d9b1c3c02f38ff931ddc29d7737091ac5658d2406ae09d3f5e7ed81eeb4fcc7