Dec 19 19:03:00.419 INFO checking chrisshyi/kosarajuSCC against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:03:00.420 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:03:00.812 INFO [stdout] 3e56a8afa79c29970509a678fdf8504defa710d3365e43ee42bcc8d660fb1d79
Dec 19 19:03:00.818 INFO running `"docker" "start" "-a" "3e56a8afa79c29970509a678fdf8504defa710d3365e43ee42bcc8d660fb1d79"`
Dec 19 19:03:02.448 INFO [stderr]     Checking kosarajuSCC v0.1.0 (/opt/crater/workdir)
Dec 19 19:03:02.904 INFO [stderr] warning: value assigned to `tail_vertx` is never read
Dec 19 19:03:02.904 INFO [stderr]   --> src/lib.rs:34:14
Dec 19 19:03:02.904 INFO [stderr]    |
Dec 19 19:03:02.904 INFO [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.904 INFO [stderr]    |              ^^^^^^^^^^
Dec 19 19:03:02.904 INFO [stderr]    |
Dec 19 19:03:02.904 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:03:02.904 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:03:02.904 INFO [stderr] 
Dec 19 19:03:02.904 INFO [stderr] warning: value assigned to `head_vertx` is never read
Dec 19 19:03:02.904 INFO [stderr]   --> src/lib.rs:34:30
Dec 19 19:03:02.904 INFO [stderr]    |
Dec 19 19:03:02.904 INFO [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.904 INFO [stderr]    |                              ^^^^^^^^^^
Dec 19 19:03:02.904 INFO [stderr]    |
Dec 19 19:03:02.904 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:03:02.904 INFO [stderr] 
Dec 19 19:03:02.904 INFO [stderr] warning: value assigned to `tail_vertx` is never read
Dec 19 19:03:02.904 INFO [stderr]    --> src/lib.rs:137:14
Dec 19 19:03:02.904 INFO [stderr]     |
Dec 19 19:03:02.904 INFO [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.904 INFO [stderr]     |              ^^^^^^^^^^
Dec 19 19:03:02.904 INFO [stderr]     |
Dec 19 19:03:02.904 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:03:02.904 INFO [stderr] 
Dec 19 19:03:02.904 INFO [stderr] warning: value assigned to `head_vertx` is never read
Dec 19 19:03:02.904 INFO [stderr]    --> src/lib.rs:137:30
Dec 19 19:03:02.904 INFO [stderr]     |
Dec 19 19:03:02.904 INFO [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.904 INFO [stderr]     |                              ^^^^^^^^^^
Dec 19 19:03:02.904 INFO [stderr]     |
Dec 19 19:03:02.904 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:03:02.904 INFO [stderr] 
Dec 19 19:03:02.924 INFO [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
Dec 19 19:03:02.924 INFO [stderr]   |
Dec 19 19:03:02.924 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 19:03:02.924 INFO [stderr] 
Dec 19 19:03:02.948 INFO [stderr] warning: value assigned to `tail_vertx` is never read
Dec 19 19:03:02.948 INFO [stderr]   --> src/lib.rs:34:14
Dec 19 19:03:02.948 INFO [stderr]    |
Dec 19 19:03:02.948 INFO [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.948 INFO [stderr]    |              ^^^^^^^^^^
Dec 19 19:03:02.948 INFO [stderr]    |
Dec 19 19:03:02.948 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 19:03:02.948 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:03:02.948 INFO [stderr] 
Dec 19 19:03:02.948 INFO [stderr] warning: value assigned to `head_vertx` is never read
Dec 19 19:03:02.948 INFO [stderr]   --> src/lib.rs:34:30
Dec 19 19:03:02.948 INFO [stderr]    |
Dec 19 19:03:02.948 INFO [stderr] 34 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.948 INFO [stderr]    |                              ^^^^^^^^^^
Dec 19 19:03:02.948 INFO [stderr]    |
Dec 19 19:03:02.948 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 19:03:02.948 INFO [stderr] 
Dec 19 19:03:02.948 INFO [stderr] warning: value assigned to `tail_vertx` is never read
Dec 19 19:03:02.948 INFO [stderr]    --> src/lib.rs:137:14
Dec 19 19:03:02.948 INFO [stderr]     |
Dec 19 19:03:02.948 INFO [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.948 INFO [stderr]     |              ^^^^^^^^^^
Dec 19 19:03:02.948 INFO [stderr]     |
Dec 19 19:03:02.948 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:03:02.948 INFO [stderr] 
Dec 19 19:03:02.948 INFO [stderr] warning: value assigned to `head_vertx` is never read
Dec 19 19:03:02.948 INFO [stderr]    --> src/lib.rs:137:30
Dec 19 19:03:02.948 INFO [stderr]     |
Dec 19 19:03:02.948 INFO [stderr] 137 |     let (mut tail_vertx, mut head_vertx) = (0, 0); // Compiler won't allow use of uninitialized variables
Dec 19 19:03:02.948 INFO [stderr]     |                              ^^^^^^^^^^
Dec 19 19:03:02.948 INFO [stderr]     |
Dec 19 19:03:02.948 INFO [stderr]     = help: maybe it is overwritten before being read?
Dec 19 19:03:02.948 INFO [stderr] 
Dec 19 19:03:02.992 INFO [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
Dec 19 19:03:02.992 INFO [stderr]   |
Dec 19 19:03:02.992 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 19:03:02.992 INFO [stderr] 
Dec 19 19:03:03.328 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 19:03:03.328 INFO [stderr]  --> src/main.rs:2:5
Dec 19 19:03:03.328 INFO [stderr]   |
Dec 19 19:03:03.328 INFO [stderr] 2 | use std::fs::File;
Dec 19 19:03:03.328 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 19:03:03.328 INFO [stderr]   |
Dec 19 19:03:03.328 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:03:03.328 INFO [stderr] 
Dec 19 19:03:03.400 INFO [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
Dec 19 19:03:03.400 INFO [stderr]   |
Dec 19 19:03:03.400 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 19:03:03.400 INFO [stderr] 
Dec 19 19:03:03.404 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 19:03:03.404 INFO [stderr]  --> src/main.rs:2:5
Dec 19 19:03:03.404 INFO [stderr]   |
Dec 19 19:03:03.404 INFO [stderr] 2 | use std::fs::File;
Dec 19 19:03:03.404 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 19:03:03.404 INFO [stderr]   |
Dec 19 19:03:03.404 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:03:03.404 INFO [stderr] 
Dec 19 19:03:03.463 INFO [stderr] warning: crate `kosarajuSCC` should have a snake case name such as `kosaraju_scc`
Dec 19 19:03:03.463 INFO [stderr]   |
Dec 19 19:03:03.463 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 19 19:03:03.463 INFO [stderr] 
Dec 19 19:03:03.508 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
Dec 19 19:03:04.368 INFO running `"docker" "inspect" "3e56a8afa79c29970509a678fdf8504defa710d3365e43ee42bcc8d660fb1d79"`
Dec 19 19:03:04.704 INFO running `"docker" "rm" "-f" "3e56a8afa79c29970509a678fdf8504defa710d3365e43ee42bcc8d660fb1d79"`
Dec 19 19:03:05.024 INFO [stdout] 3e56a8afa79c29970509a678fdf8504defa710d3365e43ee42bcc8d660fb1d79