[INFO] updating cached repository https://github.com/lochbrunner/rust-hacks
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 04a14e80469215a2b365dd3d60ca86a6520cd2ad
[INFO] testing lochbrunner/rust-hacks against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flochbrunner%2Frust-hacks" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lochbrunner/rust-hacks on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/lochbrunner/rust-hacks
[INFO] finished tweaking git repo https://github.com/lochbrunner/rust-hacks
[INFO] tweaked toml for git repo https://github.com/lochbrunner/rust-hacks written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/lochbrunner/rust-hacks already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7ca8cb467d129bc165e7192f09516ef729c6abf87de8ce68d7305eda83f377cd
[INFO] running `"docker" "start" "-a" "7ca8cb467d129bc165e7192f09516ef729c6abf87de8ce68d7305eda83f377cd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust-hacks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `Filter`, `Map`
[INFO] [stderr]  --> src/sample_map.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::iter::{Filter, Iterator, Map};
[INFO] [stderr]   |                 ^^^^^^            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sample_map.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> S`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/sample_map.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let s = self.s.iter().nth(0).unwrap();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/cross_join.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn new(left_iter: L, samples: &'a [R]) -> CrossJoin<'a, R, L> {
[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/sample_map.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub(super) fn new(iter: I, f: F, s: &'a [S]) -> SampleMap<'a, I, F, S> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `P`
[INFO] [stderr]   --> src/sample_map.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "7ca8cb467d129bc165e7192f09516ef729c6abf87de8ce68d7305eda83f377cd"`
[INFO] running `"docker" "rm" "-f" "7ca8cb467d129bc165e7192f09516ef729c6abf87de8ce68d7305eda83f377cd"`
[INFO] [stdout] 7ca8cb467d129bc165e7192f09516ef729c6abf87de8ce68d7305eda83f377cd
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 545128fdf9d860f2a8356633ad8b2a7b7696942719f10950143f8ad9b3be2282
[INFO] running `"docker" "start" "-a" "545128fdf9d860f2a8356633ad8b2a7b7696942719f10950143f8ad9b3be2282"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust-hacks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/count_calls.rs:21:18
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn f(p: &mut FnMut() -> i32) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> i32`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Filter`, `Map`
[INFO] [stderr]  --> src/sample_map.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::iter::{Filter, Iterator, Map};
[INFO] [stderr]   |                 ^^^^^^            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sample_map.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> S`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg`
[INFO] [stderr]  --> src/move_in_map.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn foo(arg: A) -> i32 {
[INFO] [stderr]   |            ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/move_in_map.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let output = inputs.into_iter().map(|item| foo(item));
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/sample_map.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let s = self.s.iter().nth(0).unwrap();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `P`
[INFO] [stderr]   --> src/sample_map.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::iter::Map` that must be used
[INFO] [stderr]    --> src/cross_join.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         input.iter().map(|s| s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: iterators are lazy and do nothing unless consumed
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "545128fdf9d860f2a8356633ad8b2a7b7696942719f10950143f8ad9b3be2282"`
[INFO] running `"docker" "rm" "-f" "545128fdf9d860f2a8356633ad8b2a7b7696942719f10950143f8ad9b3be2282"`
[INFO] [stdout] 545128fdf9d860f2a8356633ad8b2a7b7696942719f10950143f8ad9b3be2282
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 186d6374383c421f1b7cc8ecada615bebe3c8effeabcd45f42a8b89a4f899315
[INFO] running `"docker" "start" "-a" "186d6374383c421f1b7cc8ecada615bebe3c8effeabcd45f42a8b89a4f899315"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/count_calls.rs:21:18
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn f(p: &mut FnMut() -> i32) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> i32`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Filter`, `Map`
[INFO] [stderr]  --> src/sample_map.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::iter::{Filter, Iterator, Map};
[INFO] [stderr]   |                 ^^^^^^            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sample_map.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> S`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg`
[INFO] [stderr]  --> src/move_in_map.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn foo(arg: A) -> i32 {
[INFO] [stderr]   |            ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/move_in_map.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let output = inputs.into_iter().map(|item| foo(item));
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/sample_map.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let s = self.s.iter().nth(0).unwrap();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `P`
[INFO] [stderr]   --> src/sample_map.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | type P<S> = FnMut() -> S;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::iter::Map` that must be used
[INFO] [stderr]    --> src/cross_join.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         input.iter().map(|s| s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: iterators are lazy and do nothing unless consumed
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_hacks-58f606e49b034f7b
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test learn_iter::specs_learn::sam_trait ... ok
[INFO] [stdout] test count_calls::stackoverflow::test ... ok
[INFO] [stdout] test cross_join::specs::cross_iter ... ok
[INFO] [stdout] test learn_iter::specs_learn::sam_trait_filter ... ok
[INFO] [stdout] test move_in_map::specs::move_in_maps ... ok
[INFO] [stdout] test sample_map::specs::sample_map_simple ... ok
[INFO] [stdout] test learn_iter::specs_learn::sam_trait_map ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "186d6374383c421f1b7cc8ecada615bebe3c8effeabcd45f42a8b89a4f899315"`
[INFO] running `"docker" "rm" "-f" "186d6374383c421f1b7cc8ecada615bebe3c8effeabcd45f42a8b89a4f899315"`
[INFO] [stdout] 186d6374383c421f1b7cc8ecada615bebe3c8effeabcd45f42a8b89a4f899315