Dec 18 06:17:08.198 INFO checking Nazariglez/gc-mark-sweep-rs against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 06:17:08.198 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/Nazariglez/gc-mark-sweep-rs:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 06:17:08.373 INFO [stdout] 9ebd7eacfb4db7c89af903f6bc7b7d58cb48969ac915c1b3f89f4135dbb635f9
Dec 18 06:17:08.378 INFO running `"docker" "start" "-a" "9ebd7eacfb4db7c89af903f6bc7b7d58cb48969ac915c1b3f89f4135dbb635f9"`
Dec 18 06:17:09.009 INFO [stderr]     Checking gc-mark-sweep-rs v0.1.0 (/opt/crater/workdir)
Dec 18 06:17:09.316 INFO [stderr] warning: constant item is never used: `STACK_MAX`
Dec 18 06:17:09.316 INFO [stderr]  --> src/main.rs:8:1
Dec 18 06:17:09.316 INFO [stderr]   |
Dec 18 06:17:09.316 INFO [stderr] 8 | const STACK_MAX:usize = 256;
Dec 18 06:17:09.316 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr]   |
Dec 18 06:17:09.316 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: constant item is never used: `INITIAL_GC_THRESHOLD`
Dec 18 06:17:09.316 INFO [stderr]  --> src/main.rs:9:1
Dec 18 06:17:09.316 INFO [stderr]   |
Dec 18 06:17:09.316 INFO [stderr] 9 | const INITIAL_GC_THRESHOLD:usize = 10;
Dec 18 06:17:09.316 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: type alias is never used: `RefObject`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:11:1
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 11 | type RefObject = Rc<RefCell<Object>>;
Dec 18 06:17:09.316 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: struct is never constructed: `Object`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:13:1
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 13 | struct Object {
Dec 18 06:17:09.316 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: method is never used: `new`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:21:5
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 21 |     fn new(typ: ObjectType) -> RefObject {
Dec 18 06:17:09.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: method is never used: `mark`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:31:5
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 31 |     pub fn mark(&mut self) {
Dec 18 06:17:09.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: enum is never used: `ObjectType`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:46:1
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 46 | enum ObjectType {
Dec 18 06:17:09.316 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: struct is never constructed: `VM`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:54:1
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 54 | struct VM {
Dec 18 06:17:09.316 INFO [stderr]    | ^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: method is never used: `new`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:64:5
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 64 |     fn new() -> VM {
Dec 18 06:17:09.316 INFO [stderr]    |     ^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: method is never used: `new_object`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:74:5
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.316 INFO [stderr] 74 |     fn new_object(&mut self, typ: ObjectType) -> RefObject {
Dec 18 06:17:09.316 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.316 INFO [stderr] 
Dec 18 06:17:09.316 INFO [stderr] warning: method is never used: `mark_all`
Dec 18 06:17:09.316 INFO [stderr]   --> src/main.rs:82:5
Dec 18 06:17:09.316 INFO [stderr]    |
Dec 18 06:17:09.317 INFO [stderr] 82 |     fn mark_all(&mut self) {
Dec 18 06:17:09.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `sweep`
Dec 18 06:17:09.317 INFO [stderr]   --> src/main.rs:91:5
Dec 18 06:17:09.317 INFO [stderr]    |
Dec 18 06:17:09.317 INFO [stderr] 91 |     fn sweep(&mut self) {
Dec 18 06:17:09.317 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `gc`
Dec 18 06:17:09.317 INFO [stderr]    --> src/main.rs:106:5
Dec 18 06:17:09.317 INFO [stderr]     |
Dec 18 06:17:09.317 INFO [stderr] 106 |     fn gc(&mut self) {
Dec 18 06:17:09.317 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `push`
Dec 18 06:17:09.317 INFO [stderr]    --> src/main.rs:115:5
Dec 18 06:17:09.317 INFO [stderr]     |
Dec 18 06:17:09.317 INFO [stderr] 115 |     fn push(&mut self, val:RefObject) {
Dec 18 06:17:09.317 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `pop`
Dec 18 06:17:09.317 INFO [stderr]    --> src/main.rs:124:5
Dec 18 06:17:09.317 INFO [stderr]     |
Dec 18 06:17:09.317 INFO [stderr] 124 |     fn pop(&mut self) -> RefObject {
Dec 18 06:17:09.317 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `push_int`
Dec 18 06:17:09.317 INFO [stderr]    --> src/main.rs:133:5
Dec 18 06:17:09.317 INFO [stderr]     |
Dec 18 06:17:09.317 INFO [stderr] 133 |     fn push_int(&mut self, val: i32) {
Dec 18 06:17:09.317 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.317 INFO [stderr] warning: method is never used: `push_pair`
Dec 18 06:17:09.317 INFO [stderr]    --> src/main.rs:138:5
Dec 18 06:17:09.317 INFO [stderr]     |
Dec 18 06:17:09.317 INFO [stderr] 138 |     fn push_pair(&mut self) {
Dec 18 06:17:09.317 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 06:17:09.317 INFO [stderr] 
Dec 18 06:17:09.389 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
Dec 18 06:17:09.705 INFO running `"docker" "inspect" "9ebd7eacfb4db7c89af903f6bc7b7d58cb48969ac915c1b3f89f4135dbb635f9"`
Dec 18 06:17:09.890 INFO running `"docker" "rm" "-f" "9ebd7eacfb4db7c89af903f6bc7b7d58cb48969ac915c1b3f89f4135dbb635f9"`
Dec 18 06:17:10.007 INFO [stdout] 9ebd7eacfb4db7c89af903f6bc7b7d58cb48969ac915c1b3f89f4135dbb635f9