[INFO] updating cached repository https://github.com/matklad/group-by-challenge [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] 297c95d461427a61f621767443897c37bef43f0f [INFO] testing matklad/group-by-challenge against 1.44.0 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fgroup-by-challenge" "/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/matklad/group-by-challenge 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/matklad/group-by-challenge [INFO] finished tweaking git repo https://github.com/matklad/group-by-challenge [INFO] tweaked toml for git repo https://github.com/matklad/group-by-challenge written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/matklad/group-by-challenge 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] 599d509386320642a4513ea61a57f8e69349dfcdb1f218dabd000bd0b823c913 [INFO] running `"docker" "start" "-a" "599d509386320642a4513ea61a57f8e69349dfcdb1f218dabd000bd0b823c913"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling group-by-challenge v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `xs` [INFO] [stderr] --> src/lib.rs:1:29 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_xs` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `key_fn` [INFO] [stderr] --> src/lib.rs:1:36 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_key_fn` [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.30s [INFO] running `"docker" "inspect" "599d509386320642a4513ea61a57f8e69349dfcdb1f218dabd000bd0b823c913"` [INFO] running `"docker" "rm" "-f" "599d509386320642a4513ea61a57f8e69349dfcdb1f218dabd000bd0b823c913"` [INFO] [stdout] 599d509386320642a4513ea61a57f8e69349dfcdb1f218dabd000bd0b823c913 [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] b8ae87c53f00c865a0dce686d39cbd47831179c0f6b4a705615f328906939f80 [INFO] running `"docker" "start" "-a" "b8ae87c53f00c865a0dce686d39cbd47831179c0f6b4a705615f328906939f80"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling group-by-challenge v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `xs` [INFO] [stderr] --> src/lib.rs:1:29 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_xs` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `key_fn` [INFO] [stderr] --> src/lib.rs:1:36 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_key_fn` [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `xs` [INFO] [stderr] --> src/lib.rs:1:29 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_xs` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `key_fn` [INFO] [stderr] --> src/lib.rs:1:36 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_key_fn` [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.96s [INFO] running `"docker" "inspect" "b8ae87c53f00c865a0dce686d39cbd47831179c0f6b4a705615f328906939f80"` [INFO] running `"docker" "rm" "-f" "b8ae87c53f00c865a0dce686d39cbd47831179c0f6b4a705615f328906939f80"` [INFO] [stdout] b8ae87c53f00c865a0dce686d39cbd47831179c0f6b4a705615f328906939f80 [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] c8680ab6f682c9aff1796f9392eff90ea9d2b0f0a162d1e143a8d1555f03d1d2 [INFO] running `"docker" "start" "-a" "c8680ab6f682c9aff1796f9392eff90ea9d2b0f0a162d1e143a8d1555f03d1d2"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] warning: unused variable: `xs` [INFO] [stderr] --> src/lib.rs:1:29 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_xs` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `key_fn` [INFO] [stderr] --> src/lib.rs:1:36 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_key_fn` [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: unused variable: `xs` [INFO] [stderr] --> src/lib.rs:1:29 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_xs` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `key_fn` [INFO] [stderr] --> src/lib.rs:1:36 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn group_by(xs: I, key_fn: F) -> Vec<(K, Vec)> [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_key_fn` [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/group_by_challenge-cfd9ef4a73e6e96e [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests ... FAILED [INFO] [stderr] error: test failed, to rerun pass '--lib' [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- tests stdout ---- [INFO] [stdout] thread 'tests' panicked at 'not yet implemented: make the tests pass', src/lib.rs:7:5 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x56430c9b36c4 - backtrace::backtrace::libunwind::trace::hc1c4a1d8ad423b97 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x56430c9b36c4 - backtrace::backtrace::trace_unsynchronized::h82274781060cb056 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x56430c9b36c4 - std::sys_common::backtrace::_print_fmt::h2a45d89b653a4da8 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x56430c9b36c4 - ::fmt::h41a0a93ab85e6aa1 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x56430c9dc30c - core::fmt::write::hdaea18585065a96d [INFO] [stdout] at src/libcore/fmt/mod.rs:1069 [INFO] [stdout] 5: 0x56430c9673a5 - std::io::Write::write_fmt::h42f0550b6bd39c6e [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/io/mod.rs:1504 [INFO] [stdout] 6: 0x56430c9adcb1 - std::io::impls::>::write_fmt::h223d7b7033cad46d [INFO] [stdout] at src/libstd/io/impls.rs:156 [INFO] [stdout] 7: 0x56430c9b5f95 - std::sys_common::backtrace::_print::hd95f9978cc145ca4 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x56430c9b5f95 - std::sys_common::backtrace::print::hfb25ca2291be47d0 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x56430c9b5f95 - std::panicking::default_hook::{{closure}}::h44f76cee5dc8591c [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x56430c9b5c7b - std::panicking::default_hook::h198e1a712910f1e6 [INFO] [stdout] at src/libstd/panicking.rs:215 [INFO] [stdout] 11: 0x56430c9b65f2 - std::panicking::rust_panic_with_hook::hc0b4730bb8013f9d [INFO] [stdout] at src/libstd/panicking.rs:511 [INFO] [stdout] 12: 0x56430c9b61db - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:419 [INFO] [stdout] 13: 0x56430c9b614b - std::panicking::begin_panic_fmt::h3693eb684a4f728c [INFO] [stdout] at src/libstd/panicking.rs:373 [INFO] [stdout] 14: 0x56430c95d661 - group_by_challenge::group_by::h2084c59c09b3b44a [INFO] [stdout] at src/lib.rs:7 [INFO] [stdout] 15: 0x56430c95dad8 - group_by_challenge::tests::hbabd466c509d7989 [INFO] [stdout] at src/lib.rs:13 [INFO] [stdout] 16: 0x56430c95da8a - group_by_challenge::tests::{{closure}}::hcb01fa53a1cf1285 [INFO] [stdout] at src/lib.rs:11 [INFO] [stdout] 17: 0x56430c95ff9e - core::ops::function::FnOnce::call_once::h1a19cec7b198c9b4 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232 [INFO] [stdout] 18: 0x56430c98e836 - as core::ops::function::FnOnce>::call_once::hc165f65f4331a55c [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 19: 0x56430c98e836 - as core::ops::function::FnOnce<()>>::call_once::hb89f1f769cad07ce [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318 [INFO] [stdout] 20: 0x56430c98e836 - std::panicking::try::do_call::h104f7f3dae5a1b29 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331 [INFO] [stdout] 21: 0x56430c98e836 - std::panicking::try::h0e20f01361cba753 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274 [INFO] [stdout] 22: 0x56430c98e836 - std::panic::catch_unwind::h0bd0c84b5f4cd121 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394 [INFO] [stdout] 23: 0x56430c98e836 - test::run_test_in_process::hf34c22adfeb6853d [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 24: 0x56430c98e836 - test::run_test::run_test_inner::{{closure}}::h40d568b4c10a12f1 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 25: 0x56430c966856 - std::sys_common::backtrace::__rust_begin_short_backtrace::hffd9774ad3f2d778 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 26: 0x56430c96bbe5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h4594020476cf52d4 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:475 [INFO] [stdout] 27: 0x56430c96bbe5 - as core::ops::function::FnOnce<()>>::call_once::h9d0a6d45b73e29e4 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318 [INFO] [stdout] 28: 0x56430c96bbe5 - std::panicking::try::do_call::h902fd77b30bb3bb7 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331 [INFO] [stdout] 29: 0x56430c96bbe5 - std::panicking::try::hc17d3a628e65d49d [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274 [INFO] [stdout] 30: 0x56430c96bbe5 - std::panic::catch_unwind::h9c9d49cbb6b18017 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394 [INFO] [stdout] 31: 0x56430c96bbe5 - std::thread::Builder::spawn_unchecked::{{closure}}::h6a6f5a333fd631a2 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:474 [INFO] [stdout] 32: 0x56430c96bbe5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha6fb197e0ce57f73 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232 [INFO] [stdout] 33: 0x56430c9bcdda - as core::ops::function::FnOnce>::call_once::h1f1fac7de7dd9691 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 34: 0x56430c9bcdda - as core::ops::function::FnOnce>::call_once::ha031f48633a6af54 [INFO] [stdout] at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008 [INFO] [stdout] 35: 0x56430c9bcdda - std::sys::unix::thread::Thread::new::thread_start::h241864caf436e182 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 36: 0x7ff0386f5609 - start_thread [INFO] [stdout] 37: 0x7ff038601103 - __clone [INFO] [stdout] 38: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] tests [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "c8680ab6f682c9aff1796f9392eff90ea9d2b0f0a162d1e143a8d1555f03d1d2"` [INFO] running `"docker" "rm" "-f" "c8680ab6f682c9aff1796f9392eff90ea9d2b0f0a162d1e143a8d1555f03d1d2"` [INFO] [stdout] c8680ab6f682c9aff1796f9392eff90ea9d2b0f0a162d1e143a8d1555f03d1d2