[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 try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fgroup-by-challenge" "/workspace/builds/worker-1/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/matklad/group-by-challenge on toolchain 41997647ba6a77908f6ef64401414feb00bccf16 [INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "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-1/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] 0e6da347212b92e5e54f746549b52b7233286169ff838cc1457a85ba6019fa84 [INFO] running `"docker" "start" "-a" "0e6da347212b92e5e54f746549b52b7233286169ff838cc1457a85ba6019fa84"` [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 0.50s [INFO] running `"docker" "inspect" "0e6da347212b92e5e54f746549b52b7233286169ff838cc1457a85ba6019fa84"` [INFO] running `"docker" "rm" "-f" "0e6da347212b92e5e54f746549b52b7233286169ff838cc1457a85ba6019fa84"` [INFO] [stdout] 0e6da347212b92e5e54f746549b52b7233286169ff838cc1457a85ba6019fa84 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] 33840d333d30db227094d2330da67ccd2fdd97f1235711c5d2335e8830dac065 [INFO] running `"docker" "start" "-a" "33840d333d30db227094d2330da67ccd2fdd97f1235711c5d2335e8830dac065"` [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 0.98s [INFO] running `"docker" "inspect" "33840d333d30db227094d2330da67ccd2fdd97f1235711c5d2335e8830dac065"` [INFO] running `"docker" "rm" "-f" "33840d333d30db227094d2330da67ccd2fdd97f1235711c5d2335e8830dac065"` [INFO] [stdout] 33840d333d30db227094d2330da67ccd2fdd97f1235711c5d2335e8830dac065 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] 42c9341634280f538dfbe8550bc79f9f6bbb3ae0c78edcb4c6ddd78e7270969b [INFO] running `"docker" "start" "-a" "42c9341634280f538dfbe8550bc79f9f6bbb3ae0c78edcb4c6ddd78e7270969b"` [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 0.05s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/group_by_challenge-05989d6b5ed49387 [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests ... FAILED [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: 0x55daf11eafb4 - backtrace::backtrace::libunwind::trace::h61666fa4b9834a45 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stdout] 1: 0x55daf11eafb4 - backtrace::backtrace::trace_unsynchronized::h01d3725fb5da8653 [INFO] [stdout] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stdout] 2: 0x55daf11eafb4 - std::sys_common::backtrace::_print_fmt::h5c7c4751bc296f90 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stdout] 3: 0x55daf11eafb4 - ::fmt::h7729313ad2d729c7 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stdout] 4: 0x55daf1213bcc - core::fmt::write::hb0049f6c12bdaffc [INFO] [stdout] at src/libcore/fmt/mod.rs:1069 [INFO] [stdout] 5: 0x55daf119ec45 - std::io::Write::write_fmt::h5d052af13df32ea6 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/io/mod.rs:1504 [INFO] [stdout] 6: 0x55daf11e55d1 - std::io::impls::>::write_fmt::h8fe8a9bdc421b4b6 [INFO] [stdout] at src/libstd/io/impls.rs:156 [INFO] [stdout] 7: 0x55daf11ed885 - std::sys_common::backtrace::_print::ha087cac92e84a414 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stdout] 8: 0x55daf11ed885 - std::sys_common::backtrace::print::h6b013d3bfe6cbcb8 [INFO] [stdout] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stdout] 9: 0x55daf11ed885 - std::panicking::default_hook::{{closure}}::h016d7de02def2736 [INFO] [stdout] at src/libstd/panicking.rs:198 [INFO] [stdout] 10: 0x55daf11ed56b - std::panicking::default_hook::h9386f7e484840463 [INFO] [stdout] at src/libstd/panicking.rs:215 [INFO] [stdout] 11: 0x55daf11edee2 - std::panicking::rust_panic_with_hook::h3846eb1b2e5a9312 [INFO] [stdout] at src/libstd/panicking.rs:511 [INFO] [stdout] 12: 0x55daf11edacb - rust_begin_unwind [INFO] [stdout] at src/libstd/panicking.rs:419 [INFO] [stdout] 13: 0x55daf11eda3b - std::panicking::begin_panic_fmt::h2fa40d03719daab1 [INFO] [stdout] at src/libstd/panicking.rs:373 [INFO] [stdout] 14: 0x55daf1195301 - group_by_challenge::group_by::hc10ac3ddff0f41cd [INFO] [stdout] at src/lib.rs:7 [INFO] [stdout] 15: 0x55daf1195378 - group_by_challenge::tests::h4a7ac83e864b3359 [INFO] [stdout] at src/lib.rs:13 [INFO] [stdout] 16: 0x55daf119532a - group_by_challenge::tests::{{closure}}::h6467b62e0a01517c [INFO] [stdout] at src/lib.rs:11 [INFO] [stdout] 17: 0x55daf119783e - core::ops::function::FnOnce::call_once::h57c16823e5f60537 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/ops/function.rs:232 [INFO] [stdout] 18: 0x55daf11aab3f - as core::ops::function::FnOnce>::call_once::h1f6ee40732e80908 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/liballoc/boxed.rs:1008 [INFO] [stdout] 19: 0x55daf11c613e - as core::ops::function::FnOnce<()>>::call_once::h85dff111be9c2dc6 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:318 [INFO] [stdout] 20: 0x55daf11c613e - std::panicking::try::do_call::hee6f5a4bef67c840 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:331 [INFO] [stdout] 21: 0x55daf11c613e - std::panicking::try::h3384d3b948e84dbc [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:274 [INFO] [stdout] 22: 0x55daf11c613e - std::panic::catch_unwind::h5ae91218e578066d [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:394 [INFO] [stdout] 23: 0x55daf11c613e - test::run_test_in_process::he37a49587889b910 [INFO] [stdout] at src/libtest/lib.rs:541 [INFO] [stdout] 24: 0x55daf11c613e - test::run_test::run_test_inner::{{closure}}::h4f0d25136ca480c2 [INFO] [stdout] at src/libtest/lib.rs:450 [INFO] [stdout] 25: 0x55daf119e0f6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h969eceda34247af3 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/sys_common/backtrace.rs:130 [INFO] [stdout] 26: 0x55daf11a3485 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h912007997cb04e92 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/mod.rs:475 [INFO] [stdout] 27: 0x55daf11a3485 - as core::ops::function::FnOnce<()>>::call_once::h8795d8b7bd223988 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:318 [INFO] [stdout] 28: 0x55daf11a3485 - std::panicking::try::do_call::hb29b86f86d4d722e [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:331 [INFO] [stdout] 29: 0x55daf11a3485 - std::panicking::try::h4bfefb3eddc0d900 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panicking.rs:274 [INFO] [stdout] 30: 0x55daf11a3485 - std::panic::catch_unwind::h774c24d4b38d5828 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/panic.rs:394 [INFO] [stdout] 31: 0x55daf11a3485 - std::thread::Builder::spawn_unchecked::{{closure}}::ha50a32fa99413dde [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libstd/thread/mod.rs:474 [INFO] [stdout] 32: 0x55daf11a3485 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9dacb8f28d699f86 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/libcore/ops/function.rs:232 [INFO] [stdout] 33: 0x55daf11e17df - as core::ops::function::FnOnce>::call_once::h7deaeeba480c6ce2 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/liballoc/boxed.rs:1008 [INFO] [stdout] 34: 0x55daf11f46c3 - as core::ops::function::FnOnce>::call_once::h968b1dfb87756523 [INFO] [stdout] at /rustc/41997647ba6a77908f6ef64401414feb00bccf16/src/liballoc/boxed.rs:1008 [INFO] [stdout] 35: 0x55daf11f46c3 - std::sys::unix::thread::Thread::new::thread_start::h2399addeb6370595 [INFO] [stdout] at src/libstd/sys/unix/thread.rs:87 [INFO] [stdout] 36: 0x7f4c6d9506db - start_thread [INFO] [stdout] 37: 0x7f4c6d46188f - __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] [stderr] error: test failed, to rerun pass '--lib' [INFO] running `"docker" "inspect" "42c9341634280f538dfbe8550bc79f9f6bbb3ae0c78edcb4c6ddd78e7270969b"` [INFO] running `"docker" "rm" "-f" "42c9341634280f538dfbe8550bc79f9f6bbb3ae0c78edcb4c6ddd78e7270969b"` [INFO] [stdout] 42c9341634280f538dfbe8550bc79f9f6bbb3ae0c78edcb4c6ddd78e7270969b