[INFO] cloning repository leviathan88/safe_linked_lists_rust
[INFO] running `"git" "clone" "--bare" "git://github.com/leviathan88/safe_linked_lists_rust.git" "work/cache/sources/gh/leviathan88/safe_linked_lists_rust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/leviathan88/safe_linked_lists_rust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/leviathan88/safe_linked_lists_rust" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/leviathan88/safe_linked_lists_rust" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/leviathan88/safe_linked_lists_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/leviathan88/safe_linked_lists_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e4ba717536e07f5a946d94325cd53edd6273138b
[INFO] sha for GitHub repo leviathan88/safe_linked_lists_rust: e4ba717536e07f5a946d94325cd53edd6273138b
[INFO] validating manifest of leviathan88/safe_linked_lists_rust on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of leviathan88/safe_linked_lists_rust on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing leviathan88/safe_linked_lists_rust
[INFO] finished frobbing leviathan88/safe_linked_lists_rust
[INFO] frobbed toml for leviathan88/safe_linked_lists_rust written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust/Cargo.toml
[INFO] started frobbing leviathan88/safe_linked_lists_rust
[INFO] finished frobbing leviathan88/safe_linked_lists_rust
[INFO] frobbed toml for leviathan88/safe_linked_lists_rust written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/leviathan88/safe_linked_lists_rust/Cargo.toml
[INFO] crate leviathan88/safe_linked_lists_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] testing leviathan88/safe_linked_lists_rust against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] dca105399f140face761c1fd9428b0e798e9370c03f4f4975d7d60e80a1d00c6
[INFO] running `"docker" "start" "-a" "dca105399f140face761c1fd9428b0e798e9370c03f4f4975d7d60e80a1d00c6"`
[INFO] [stderr]    Compiling linky_lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/lists/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/lists/node.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/lists/mod.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_empty`
[INFO] [stderr]   --> src/lists/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new_empty() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "dca105399f140face761c1fd9428b0e798e9370c03f4f4975d7d60e80a1d00c6"`
[INFO] running `"docker" "rm" "-f" "dca105399f140face761c1fd9428b0e798e9370c03f4f4975d7d60e80a1d00c6"`
[INFO] [stdout] dca105399f140face761c1fd9428b0e798e9370c03f4f4975d7d60e80a1d00c6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] e616f30b84821b175ce9affec0cd128530a6cfc1f7ff7b412479e6ba5bd44258
[INFO] running `"docker" "start" "-a" "e616f30b84821b175ce9affec0cd128530a6cfc1f7ff7b412479e6ba5bd44258"`
[INFO] [stderr]    Compiling linky_lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "e616f30b84821b175ce9affec0cd128530a6cfc1f7ff7b412479e6ba5bd44258"`
[INFO] running `"docker" "rm" "-f" "e616f30b84821b175ce9affec0cd128530a6cfc1f7ff7b412479e6ba5bd44258"`
[INFO] [stdout] e616f30b84821b175ce9affec0cd128530a6cfc1f7ff7b412479e6ba5bd44258
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/leviathan88/safe_linked_lists_rust:/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] b87dce9d2cdc1ee85b8000dc14be69494f7e893ddd14ec2096960e4b653e0a45
[INFO] running `"docker" "start" "-a" "b87dce9d2cdc1ee85b8000dc14be69494f7e893ddd14ec2096960e4b653e0a45"`
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test lists::tests::test_pop_head ... ok
[INFO] [stdout] test lists::tests::test_pop_end ... ok
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linky_lists-85eaf41cd02445e6
[INFO] [stdout] test lists::tests::test_new_empty_list ... ok
[INFO] [stdout] test lists::tests::test_new_list ... ok
[INFO] [stdout] test lists::tests::test_linked_list_append_start ... ok
[INFO] [stdout] test lists::tests::test_linked_list_append_end ... ok
[INFO] [stdout] test lists::node::tests::test_new_node ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b87dce9d2cdc1ee85b8000dc14be69494f7e893ddd14ec2096960e4b653e0a45"`
[INFO] running `"docker" "rm" "-f" "b87dce9d2cdc1ee85b8000dc14be69494f7e893ddd14ec2096960e4b653e0a45"`
[INFO] [stdout] b87dce9d2cdc1ee85b8000dc14be69494f7e893ddd14ec2096960e4b653e0a45