Nov 28 12:02:26.781 INFO checking Nazariglez/gc-mark-sweep-rs against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 12:02:26.781 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 28 12:02:27.171 INFO [stdout] 6b4628494e37d79a50c307a562e5f3da1592a4fba0ad814f20d96f51a966d565
Nov 28 12:02:27.178 INFO running `"docker" "start" "-a" "6b4628494e37d79a50c307a562e5f3da1592a4fba0ad814f20d96f51a966d565"`
Nov 28 12:02:28.072 INFO [stderr] usermod: no changes
Nov 28 12:02:28.124 INFO [stderr]     Checking gc-mark-sweep-rs v0.1.0 (/source)
Nov 28 12:02:28.689 INFO [stderr] warning: constant item is never used: `STACK_MAX`
Nov 28 12:02:28.689 INFO [stderr]  --> src/main.rs:8:1
Nov 28 12:02:28.689 INFO [stderr]   |
Nov 28 12:02:28.689 INFO [stderr] 8 | const STACK_MAX:usize = 256;
Nov 28 12:02:28.689 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr]   |
Nov 28 12:02:28.689 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: constant item is never used: `INITIAL_GC_THRESHOLD`
Nov 28 12:02:28.689 INFO [stderr]  --> src/main.rs:9:1
Nov 28 12:02:28.689 INFO [stderr]   |
Nov 28 12:02:28.689 INFO [stderr] 9 | const INITIAL_GC_THRESHOLD:usize = 10;
Nov 28 12:02:28.689 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: type alias is never used: `RefObject`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:11:1
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 11 | type RefObject = Rc<RefCell<Object>>;
Nov 28 12:02:28.689 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: struct is never constructed: `Object`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:13:1
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 13 | struct Object {
Nov 28 12:02:28.689 INFO [stderr]    | ^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `new`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:21:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 21 |     fn new(typ: ObjectType) -> RefObject {
Nov 28 12:02:28.689 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `mark`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:31:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 31 |     pub fn mark(&mut self) {
Nov 28 12:02:28.689 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: enum is never used: `ObjectType`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:46:1
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 46 | enum ObjectType {
Nov 28 12:02:28.689 INFO [stderr]    | ^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: struct is never constructed: `VM`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:54:1
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 54 | struct VM {
Nov 28 12:02:28.689 INFO [stderr]    | ^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `new`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:64:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 64 |     fn new() -> VM {
Nov 28 12:02:28.689 INFO [stderr]    |     ^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `new_object`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:74:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 74 |     fn new_object(&mut self, typ: ObjectType) -> RefObject {
Nov 28 12:02:28.689 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `mark_all`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:82:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 82 |     fn mark_all(&mut self) {
Nov 28 12:02:28.689 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.689 INFO [stderr] 
Nov 28 12:02:28.689 INFO [stderr] warning: method is never used: `sweep`
Nov 28 12:02:28.689 INFO [stderr]   --> src/main.rs:91:5
Nov 28 12:02:28.689 INFO [stderr]    |
Nov 28 12:02:28.689 INFO [stderr] 91 |     fn sweep(&mut self) {
Nov 28 12:02:28.690 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.690 INFO [stderr] warning: method is never used: `gc`
Nov 28 12:02:28.690 INFO [stderr]    --> src/main.rs:106:5
Nov 28 12:02:28.690 INFO [stderr]     |
Nov 28 12:02:28.690 INFO [stderr] 106 |     fn gc(&mut self) {
Nov 28 12:02:28.690 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.690 INFO [stderr] warning: method is never used: `push`
Nov 28 12:02:28.690 INFO [stderr]    --> src/main.rs:115:5
Nov 28 12:02:28.690 INFO [stderr]     |
Nov 28 12:02:28.690 INFO [stderr] 115 |     fn push(&mut self, val:RefObject) {
Nov 28 12:02:28.690 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.690 INFO [stderr] warning: method is never used: `pop`
Nov 28 12:02:28.690 INFO [stderr]    --> src/main.rs:124:5
Nov 28 12:02:28.690 INFO [stderr]     |
Nov 28 12:02:28.690 INFO [stderr] 124 |     fn pop(&mut self) -> RefObject {
Nov 28 12:02:28.690 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.690 INFO [stderr] warning: method is never used: `push_int`
Nov 28 12:02:28.690 INFO [stderr]    --> src/main.rs:133:5
Nov 28 12:02:28.690 INFO [stderr]     |
Nov 28 12:02:28.690 INFO [stderr] 133 |     fn push_int(&mut self, val: i32) {
Nov 28 12:02:28.690 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.690 INFO [stderr] warning: method is never used: `push_pair`
Nov 28 12:02:28.690 INFO [stderr]    --> src/main.rs:138:5
Nov 28 12:02:28.690 INFO [stderr]     |
Nov 28 12:02:28.690 INFO [stderr] 138 |     fn push_pair(&mut self) {
Nov 28 12:02:28.690 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 12:02:28.690 INFO [stderr] 
Nov 28 12:02:28.767 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
Nov 28 12:02:28.771 INFO [stderr] su: No module specific data is present
Nov 28 12:02:29.092 INFO running `"docker" "inspect" "6b4628494e37d79a50c307a562e5f3da1592a4fba0ad814f20d96f51a966d565"`
Nov 28 12:02:29.200 INFO running `"docker" "rm" "-f" "6b4628494e37d79a50c307a562e5f3da1592a4fba0ad814f20d96f51a966d565"`
Nov 28 12:02:29.304 INFO [stdout] 6b4628494e37d79a50c307a562e5f3da1592a4fba0ad814f20d96f51a966d565