[INFO] updating cached repository https://github.com/zhenhuanlee/lists [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 1843ceed34c5430df52e577ca11703f0eb01a3af [INFO] testing zhenhuanlee/lists against beta-2019-09-28 for beta-1.39-1 [INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Flists" "work/builds/worker-0/source"` [INFO] [stderr] Cloning into 'work/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/zhenhuanlee/lists on toolchain beta-2019-09-28 [INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/zhenhuanlee/lists [INFO] finished tweaking git repo https://github.com/zhenhuanlee/lists [INFO] tweaked toml for git repo https://github.com/zhenhuanlee/lists written to work/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/zhenhuanlee/lists already has a lockfile, it will not be regenerated [INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"` [INFO] [stdout] b393f38d5d28b0326c1bf84b6c97338553a33aa174d69bcfd28d8a16e70d189f [INFO] running `"docker" "start" "-a" "b393f38d5d28b0326c1bf84b6c97338553a33aa174d69bcfd28d8a16e70d189f"` [INFO] [stderr] Compiling lists v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `super::List` [INFO] [stderr] --> src/lib/first.rs:56:9 [INFO] [stderr] | [INFO] [stderr] 56 | use super::List; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `super::List` [INFO] [stderr] --> src/lib/second.rs:121:9 [INFO] [stderr] | [INFO] [stderr] 121 | use super::List; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::mem` [INFO] [stderr] --> src/main.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use std::mem; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:18:9 [INFO] [stderr] | [INFO] [stderr] 18 | let x = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let y = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/main.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let z = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `elem` [INFO] [stderr] --> src/lib/fourth.rs:28:16 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new(elem: T) -> Self { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_elem` [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `More` [INFO] [stderr] --> src/lib/first.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | More(Box), [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/first.rs:22:5 [INFO] [stderr] | [INFO] [stderr] 22 | pub fn new() -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `push` [INFO] [stderr] --> src/lib/first.rs:26:5 [INFO] [stderr] | [INFO] [stderr] 26 | pub fn push(&mut self, elem: i32) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `pop` [INFO] [stderr] --> src/lib/first.rs:32:5 [INFO] [stderr] | [INFO] [stderr] 32 | pub fn pop(&mut self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/second.rs:26:5 [INFO] [stderr] | [INFO] [stderr] 26 | pub fn new() -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `push` [INFO] [stderr] --> src/lib/second.rs:30:5 [INFO] [stderr] | [INFO] [stderr] 30 | pub fn push(&mut self, elem: T) -> &mut Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `peek` [INFO] [stderr] --> src/lib/second.rs:53:5 [INFO] [stderr] | [INFO] [stderr] 53 | pub fn peek(&self) -> Option<&T> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `mut_peek` [INFO] [stderr] --> src/lib/second.rs:59:5 [INFO] [stderr] | [INFO] [stderr] 59 | pub fn mut_peek(&mut self) -> Option<&mut T> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `into_iter` [INFO] [stderr] --> src/lib/second.rs:67:5 [INFO] [stderr] | [INFO] [stderr] 67 | pub fn into_iter(self) -> IntoIter { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `iter` [INFO] [stderr] --> src/lib/second.rs:71:5 [INFO] [stderr] | [INFO] [stderr] 71 | pub fn iter(&self) -> Iter { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `iter_mut` [INFO] [stderr] --> src/lib/second.rs:75:5 [INFO] [stderr] | [INFO] [stderr] 75 | pub fn iter_mut(&mut self) -> IterMut { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `iter` [INFO] [stderr] --> src/lib/third.rs:21:5 [INFO] [stderr] | [INFO] [stderr] 21 | fn iter(&self) -> Iter { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/third.rs:38:5 [INFO] [stderr] | [INFO] [stderr] 38 | pub fn new() -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `append` [INFO] [stderr] --> src/lib/third.rs:42:5 [INFO] [stderr] | [INFO] [stderr] 42 | pub fn append(&self, elem: T) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tail` [INFO] [stderr] --> src/lib/third.rs:56:5 [INFO] [stderr] | [INFO] [stderr] 56 | pub fn tail(&self) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head` [INFO] [stderr] --> src/lib/third.rs:60:5 [INFO] [stderr] | [INFO] [stderr] 60 | pub fn head(&self) -> Option<&T> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `List` [INFO] [stderr] --> src/lib/fourth.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | struct List { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: type alias is never used: `Link` [INFO] [stderr] --> src/lib/fourth.rs:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | type Link = Option>>>; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Node` [INFO] [stderr] --> src/lib/fourth.rs:11:1 [INFO] [stderr] | [INFO] [stderr] 11 | struct Node { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/fourth.rs:18:5 [INFO] [stderr] | [INFO] [stderr] 18 | fn new(elem: T) -> Rc> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/fourth.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new(elem: T) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `push_front` [INFO] [stderr] --> src/lib/fourth.rs:32:5 [INFO] [stderr] | [INFO] [stderr] 32 | pub fn push_front(&mut self, elem: T) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `second` [INFO] [stderr] --> src/main.rs:13:1 [INFO] [stderr] | [INFO] [stderr] 13 | fn second() { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `first` [INFO] [stderr] --> src/main.rs:23:1 [INFO] [stderr] | [INFO] [stderr] 23 | fn first() { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_ref` [INFO] [stderr] --> src/main.rs:39:1 [INFO] [stderr] | [INFO] [stderr] 39 | fn test_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.15s [INFO] running `"docker" "inspect" "b393f38d5d28b0326c1bf84b6c97338553a33aa174d69bcfd28d8a16e70d189f"` [INFO] running `"docker" "rm" "-f" "b393f38d5d28b0326c1bf84b6c97338553a33aa174d69bcfd28d8a16e70d189f"` [INFO] [stdout] b393f38d5d28b0326c1bf84b6c97338553a33aa174d69bcfd28d8a16e70d189f [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"` [INFO] [stdout] 1ef99d2f7a5cfab6b12f7627969f80f4e75c08f230a25771b940696a6c02ab3c [INFO] running `"docker" "start" "-a" "1ef99d2f7a5cfab6b12f7627969f80f4e75c08f230a25771b940696a6c02ab3c"` [INFO] [stderr] Compiling lists v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `std::mem` [INFO] [stderr] --> src/main.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use std::mem; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:18:9 [INFO] [stderr] | [INFO] [stderr] 18 | let x = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let y = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/main.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let z = iter.next().unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `elem` [INFO] [stderr] --> src/lib/fourth.rs:28:16 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new(elem: T) -> Self { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_elem` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `List` [INFO] [stderr] --> src/lib/fourth.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | struct List { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: type alias is never used: `Link` [INFO] [stderr] --> src/lib/fourth.rs:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | type Link = Option>>>; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Node` [INFO] [stderr] --> src/lib/fourth.rs:11:1 [INFO] [stderr] | [INFO] [stderr] 11 | struct Node { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/fourth.rs:18:5 [INFO] [stderr] | [INFO] [stderr] 18 | fn new(elem: T) -> Rc> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/lib/fourth.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new(elem: T) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `push_front` [INFO] [stderr] --> src/lib/fourth.rs:32:5 [INFO] [stderr] | [INFO] [stderr] 32 | pub fn push_front(&mut self, elem: T) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `second` [INFO] [stderr] --> src/main.rs:13:1 [INFO] [stderr] | [INFO] [stderr] 13 | fn second() { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `first` [INFO] [stderr] --> src/main.rs:23:1 [INFO] [stderr] | [INFO] [stderr] 23 | fn first() { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_ref` [INFO] [stderr] --> src/main.rs:39:1 [INFO] [stderr] | [INFO] [stderr] 39 | fn test_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.02s [INFO] running `"docker" "inspect" "1ef99d2f7a5cfab6b12f7627969f80f4e75c08f230a25771b940696a6c02ab3c"` [INFO] running `"docker" "rm" "-f" "1ef99d2f7a5cfab6b12f7627969f80f4e75c08f230a25771b940696a6c02ab3c"` [INFO] [stdout] 1ef99d2f7a5cfab6b12f7627969f80f4e75c08f230a25771b940696a6c02ab3c [INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"` [INFO] [stdout] 6a66087827e3ad2585043317d3eae30e082a96710529d9993cb5e93a1b3d34f4 [INFO] running `"docker" "start" "-a" "6a66087827e3ad2585043317d3eae30e082a96710529d9993cb5e93a1b3d34f4"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.04s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/lists-c22e46426a694656 [INFO] [stdout] [INFO] [stdout] running 8 tests [INFO] [stdout] test lib::first::test::basics ... ok [INFO] [stdout] test lib::second::test::into_iter ... ok [INFO] [stdout] test lib::second::test::iter ... ok [INFO] [stdout] test lib::second::test::ttt ... ok [INFO] [stdout] test lib::second::test::iter_mut ... ok [INFO] [stdout] test lib::third::test::basic ... ok [INFO] [stdout] test lib::third::test::iter ... ok [INFO] [stdout] test lib::second::test::peek ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "6a66087827e3ad2585043317d3eae30e082a96710529d9993cb5e93a1b3d34f4"` [INFO] running `"docker" "rm" "-f" "6a66087827e3ad2585043317d3eae30e082a96710529d9993cb5e93a1b3d34f4"` [INFO] [stdout] 6a66087827e3ad2585043317d3eae30e082a96710529d9993cb5e93a1b3d34f4