[INFO] updating cached repository marior765/GC
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/marior765/GC
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/marior765/GC" "work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/marior765/GC" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/marior765/GC"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/marior765/GC'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9fffe66fb340c3eebc081c15c7db265f35e3a691
[INFO] sha for GitHub repo marior765/GC: 9fffe66fb340c3eebc081c15c7db265f35e3a691
[INFO] validating manifest of marior765/GC 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 marior765/GC 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 marior765/GC
[INFO] finished frobbing marior765/GC
[INFO] frobbed toml for marior765/GC written to work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC/Cargo.toml
[INFO] started frobbing marior765/GC
[INFO] finished frobbing marior765/GC
[INFO] frobbed toml for marior765/GC written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/marior765/GC/Cargo.toml
[INFO] crate marior765/GC 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 marior765/GC 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC:/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] f568f279f3daea6cfbf2cd64c2909df1a3ca9ce5444262c3ba97c5d9ee0ce7ba
[INFO] running `"docker" "start" "-a" "f568f279f3daea6cfbf2cd64c2909df1a3ca9ce5444262c3ba97c5d9ee0ce7ba"`
[INFO] [stderr]    Compiling gc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]    --> src/main.rs:239:13
[INFO] [stderr]     |
[INFO] [stderr] 239 |         for j in 0..20 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/main.rs:242:13
[INFO] [stderr]     |
[INFO] [stderr] 242 |         for k in 0..20 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STACK_MAX_SIZE`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const STACK_MAX_SIZE: usize = 526;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `StackLink`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | type StackLink = Rc<RefCell<Vec<SingleLink>>>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mark`
[INFO] [stderr]    --> src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     pub fn mark<'a>(&mut self, item: &'a mut Object) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "f568f279f3daea6cfbf2cd64c2909df1a3ca9ce5444262c3ba97c5d9ee0ce7ba"`
[INFO] running `"docker" "rm" "-f" "f568f279f3daea6cfbf2cd64c2909df1a3ca9ce5444262c3ba97c5d9ee0ce7ba"`
[INFO] [stdout] f568f279f3daea6cfbf2cd64c2909df1a3ca9ce5444262c3ba97c5d9ee0ce7ba
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC:/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] eb921fb662ae9a542b971cc5d4a48fe09e8f3c6d1f1db1cb849d757c811986b2
[INFO] running `"docker" "start" "-a" "eb921fb662ae9a542b971cc5d4a48fe09e8f3c6d1f1db1cb849d757c811986b2"`
[INFO] [stderr]    Compiling gc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]    --> src/main.rs:239:13
[INFO] [stderr]     |
[INFO] [stderr] 239 |         for j in 0..20 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]    --> src/main.rs:242:13
[INFO] [stderr]     |
[INFO] [stderr] 242 |         for k in 0..20 {
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `STACK_MAX_SIZE`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const STACK_MAX_SIZE: usize = 526;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `StackLink`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | type StackLink = Rc<RefCell<Vec<SingleLink>>>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mark`
[INFO] [stderr]    --> src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     pub fn mark<'a>(&mut self, item: &'a mut Object) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "eb921fb662ae9a542b971cc5d4a48fe09e8f3c6d1f1db1cb849d757c811986b2"`
[INFO] running `"docker" "rm" "-f" "eb921fb662ae9a542b971cc5d4a48fe09e8f3c6d1f1db1cb849d757c811986b2"`
[INFO] [stdout] eb921fb662ae9a542b971cc5d4a48fe09e8f3c6d1f1db1cb849d757c811986b2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/marior765/GC:/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] 137bafeb28a66f686808d2ff84baa2b40697fa3d9916be8ecc7dd14accf9e109
[INFO] running `"docker" "start" "-a" "137bafeb28a66f686808d2ff84baa2b40697fa3d9916be8ecc7dd14accf9e109"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gc-9a0c5cc64fe9d24b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "137bafeb28a66f686808d2ff84baa2b40697fa3d9916be8ecc7dd14accf9e109"`
[INFO] running `"docker" "rm" "-f" "137bafeb28a66f686808d2ff84baa2b40697fa3d9916be8ecc7dd14accf9e109"`
[INFO] [stdout] 137bafeb28a66f686808d2ff84baa2b40697fa3d9916be8ecc7dd14accf9e109