[INFO] updating cached repository varzac/rust_collections
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/varzac/rust_collections
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/varzac/rust_collections" "work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/varzac/rust_collections" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/varzac/rust_collections"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/varzac/rust_collections'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db1285199d9300d32cdd25281583753dc1de814d
[INFO] sha for GitHub repo varzac/rust_collections: db1285199d9300d32cdd25281583753dc1de814d
[INFO] validating manifest of varzac/rust_collections on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of varzac/rust_collections on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing varzac/rust_collections
[INFO] finished frobbing varzac/rust_collections
[INFO] frobbed toml for varzac/rust_collections written to work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections/Cargo.toml
[INFO] started frobbing varzac/rust_collections
[INFO] finished frobbing varzac/rust_collections
[INFO] frobbed toml for varzac/rust_collections written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/varzac/rust_collections/Cargo.toml
[INFO] crate varzac/rust_collections already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing varzac/rust_collections against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 8621b58f366086f8cdf7b3ccd57d985c86922635558948b7d8262c0af4accfa2
[INFO] running `"docker" "start" "-a" "8621b58f366086f8cdf7b3ccd57d985c86922635558948b7d8262c0af4accfa2"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/linked_list.rs` was erroneously implicitly accepted for binary `linked_list`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling linked_list v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `delete_val`
[INFO] [stderr]   --> src/linked_list.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn delete_val(&self, val: &T) -> Option<Rc<LinkedList<T>>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_val`
[INFO] [stderr]   --> src/linked_list.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn insert_val(&self, val: T) -> LinkedList<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `length`
[INFO] [stderr]   --> src/linked_list.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn length(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find`
[INFO] [stderr]   --> src/linked_list.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn find(&self, val: T) -> Option<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "8621b58f366086f8cdf7b3ccd57d985c86922635558948b7d8262c0af4accfa2"`
[INFO] running `"docker" "rm" "-f" "8621b58f366086f8cdf7b3ccd57d985c86922635558948b7d8262c0af4accfa2"`
[INFO] [stdout] 8621b58f366086f8cdf7b3ccd57d985c86922635558948b7d8262c0af4accfa2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 975dc92e8b57f8ab6c9d2daba4772b91c1b31c2dd8c7695ef9058d359d9734eb
[INFO] running `"docker" "start" "-a" "975dc92e8b57f8ab6c9d2daba4772b91c1b31c2dd8c7695ef9058d359d9734eb"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/linked_list.rs` was erroneously implicitly accepted for binary `linked_list`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling linked_list v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "975dc92e8b57f8ab6c9d2daba4772b91c1b31c2dd8c7695ef9058d359d9734eb"`
[INFO] running `"docker" "rm" "-f" "975dc92e8b57f8ab6c9d2daba4772b91c1b31c2dd8c7695ef9058d359d9734eb"`
[INFO] [stdout] 975dc92e8b57f8ab6c9d2daba4772b91c1b31c2dd8c7695ef9058d359d9734eb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/varzac/rust_collections:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] db8c110829a548c4a32b5f63d6785ff0c0a09b1f0f7d6b42a51f682ba14a5de4
[INFO] running `"docker" "start" "-a" "db8c110829a548c4a32b5f63d6785ff0c0a09b1f0f7d6b42a51f682ba14a5de4"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/linked_list.rs` was erroneously implicitly accepted for binary `linked_list`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linked_list-64f9056618146d90
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test test_clone ... ok
[INFO] [stdout] test test_delete_only_element ... ok
[INFO] [stdout] test test_eq ... ok
[INFO] [stdout] test test_get ... ok
[INFO] [stdout] test test_insert_val ... ok
[INFO] [stdout] test test_delete_found ... ok
[INFO] [stdout] test test_find_exists ... ok
[INFO] [stdout] test test_get_oob ... ok
[INFO] [stdout] test test_delete_not_found ... ok
[INFO] [stdout] test test_find_not_exists ... ok
[INFO] [stdout] test test_length ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "db8c110829a548c4a32b5f63d6785ff0c0a09b1f0f7d6b42a51f682ba14a5de4"`
[INFO] running `"docker" "rm" "-f" "db8c110829a548c4a32b5f63d6785ff0c0a09b1f0f7d6b42a51f682ba14a5de4"`
[INFO] [stdout] db8c110829a548c4a32b5f63d6785ff0c0a09b1f0f7d6b42a51f682ba14a5de4