[INFO] updating cached repository chrisshyi/kosarajuSCC
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chrisshyi/kosarajuSCC
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/kosarajuSCC" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/chrisshyi/kosarajuSCC"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/chrisshyi/kosarajuSCC'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/kosarajuSCC" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/chrisshyi/kosarajuSCC"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/chrisshyi/kosarajuSCC'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd8d6e8222600650dfcde4949060a7d698a8a26c
[INFO] sha for GitHub repo chrisshyi/kosarajuSCC: fd8d6e8222600650dfcde4949060a7d698a8a26c
[INFO] validating manifest of chrisshyi/kosarajuSCC on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chrisshyi/kosarajuSCC on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chrisshyi/kosarajuSCC
[INFO] finished frobbing chrisshyi/kosarajuSCC
[INFO] frobbed toml for chrisshyi/kosarajuSCC written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/chrisshyi/kosarajuSCC/Cargo.toml
[INFO] started frobbing chrisshyi/kosarajuSCC
[INFO] finished frobbing chrisshyi/kosarajuSCC
[INFO] frobbed toml for chrisshyi/kosarajuSCC written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/chrisshyi/kosarajuSCC/Cargo.toml
[INFO] crate chrisshyi/kosarajuSCC has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking chrisshyi/kosarajuSCC against try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-6/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/chrisshyi/kosarajuSCC:/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" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 56a9bed61ef1d9f720cca74d5bace816e948ada7bcb8d071e2813e7640d6d28b
[INFO] running `"docker" "start" "-a" "56a9bed61ef1d9f720cca74d5bace816e948ada7bcb8d071e2813e7640d6d28b"`
[INFO] [stderr]     Checking kosarajuSCC v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |                              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:14
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:30
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |                              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `kosaraju_scc`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]   --> src/lib.rs:34:30
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]    |                              ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tail_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:14
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `head_vertx` is never read
[INFO] [stderr]    --> src/lib.rs:137:30
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
[INFO] [stderr]     |                              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `kosaraju_scc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `kosaraju_scc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `kosarajuSCC` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `kosaraju_scc`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "56a9bed61ef1d9f720cca74d5bace816e948ada7bcb8d071e2813e7640d6d28b"`
[INFO] running `"docker" "rm" "-f" "56a9bed61ef1d9f720cca74d5bace816e948ada7bcb8d071e2813e7640d6d28b"`
[INFO] [stdout] 56a9bed61ef1d9f720cca74d5bace816e948ada7bcb8d071e2813e7640d6d28b