[INFO] fetching crate regen 0.1.0...
[INFO] testing regen-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate regen 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate regen 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate regen 0.1.0
[INFO] finished tweaking crates.io crate regen 0.1.0
[INFO] tweaked toml for crates.io crate regen 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate regen 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2e0806692e99b95d231934504b6872ee454c1ec01fc631f273e1da2b4573b2b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a2e0806692e99b95d231934504b6872ee454c1ec01fc631f273e1da2b4573b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2e0806692e99b95d231934504b6872ee454c1ec01fc631f273e1da2b4573b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2e0806692e99b95d231934504b6872ee454c1ec01fc631f273e1da2b4573b2b", kill_on_drop: false }`
[INFO] [stdout] a2e0806692e99b95d231934504b6872ee454c1ec01fc631f273e1da2b4573b2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b955cfbf1f2fe98a3c86f947626d41ba5273054e89020de4bd2f87f727ce2eb5
[INFO] running `Command { std: "docker" "start" "-a" "b955cfbf1f2fe98a3c86f947626d41ba5273054e89020de4bd2f87f727ce2eb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling regen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `Command { std: "docker" "inspect" "b955cfbf1f2fe98a3c86f947626d41ba5273054e89020de4bd2f87f727ce2eb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b955cfbf1f2fe98a3c86f947626d41ba5273054e89020de4bd2f87f727ce2eb5", kill_on_drop: false }`
[INFO] [stdout] b955cfbf1f2fe98a3c86f947626d41ba5273054e89020de4bd2f87f727ce2eb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10e5756e81164ca9db4295313a19fc52edfe23c208ab93afc2916777c7c3eaba
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "10e5756e81164ca9db4295313a19fc52edfe23c208ab93afc2916777c7c3eaba", kill_on_drop: false }`
[INFO] [stderr]    Compiling regen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `Command { std: "docker" "inspect" "10e5756e81164ca9db4295313a19fc52edfe23c208ab93afc2916777c7c3eaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10e5756e81164ca9db4295313a19fc52edfe23c208ab93afc2916777c7c3eaba", kill_on_drop: false }`
[INFO] [stdout] 10e5756e81164ca9db4295313a19fc52edfe23c208ab93afc2916777c7c3eaba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5bfedbaac14005911b9fbd9cc177b5233bbe405a1a4063619661f38374e9fafb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5bfedbaac14005911b9fbd9cc177b5233bbe405a1a4063619661f38374e9fafb", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/regen-abcf707b86fcc035
[INFO] [stdout] running 55 tests
[INFO] [stdout] test appending_iterators::tests::alternation_char_class ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_byte_class ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_concatenation ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_reports_alt_element_counts ... ok
[INFO] [stdout] test appending_iterators::tests::char_class_reports_min_elements_of_one ... ok
[INFO] [stdout] test appending_iterators::tests::char_class_resets ... ok
[INFO] [stdout] test appending_iterators::tests::char_class_uses_all_values ... ok
[INFO] [stdout] test appending_iterators::tests::char_literal_returns_min_elements_in_chars ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_alternation ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_byte_class ... ok
[INFO] [stdout] test appending_iterators::tests::byte_literal_returns_min_elements_in_bytes ... ok
[INFO] [stdout] test appending_iterators::tests::char_class_reports_element_count_of_one ... ok
[INFO] [stdout] test appending_iterators::tests::byte_literal_returns_element_count_in_bytes ... ok
[INFO] [stdout] test appending_iterators::tests::byte_class_uses_all_values ... ok
[INFO] [stdout] test appending_iterators::tests::byte_class_resets ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_char_class ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_reports_total_element_count ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_reports_total_min_elements ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_resets ... ok
[INFO] [stdout] test appending_iterators::tests::concatenation_uses_all_values ... ok
[INFO] [stdout] test appending_iterators::tests::empty_alternation_returns_nothing ... ok
[INFO] [stdout] test appending_iterators::tests::empty_byte_class_returns_nothing ... ok
[INFO] [stdout] test appending_iterators::tests::empty_char_class_returns_nothing ... ok
[INFO] [stdout] test appending_iterators::tests::empty_concatenation_returns_nothing ... ok
[INFO] [stdout] test appending_iterators::tests::empty_repeat_returns_empty_string ... ok
[INFO] [stdout] test appending_iterators::tests::byte_class_reports_element_count_of_one ... ok
[INFO] [stdout] test appending_iterators::tests::literal_resets ... ok
[INFO] [stdout] test appending_iterators::tests::literal_returns_one_value ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_alternation ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_alternation_respects_max_element_hint ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_byte_class ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_char_class ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_reports_element_count ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_reports_min_elements ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_resets ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_respects_max_element_hint ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_uses_all_values ... ok
[INFO] [stdout] test appending_iterators::tests::repeat_with_zero_reports_zero_min_elements ... ok
[INFO] [stdout] test tests::alternation ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_uses_all_values ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_resets ... ok
[INFO] [stdout] test appending_iterators::tests::char_literal_returns_element_count_in_chars ... ok
[INFO] [stdout] test appending_iterators::tests::alternation_reports_alt_min_elements ... ok
[INFO] [stdout] test tests::repetition_zero_or_one ... ok
[INFO] [stdout] test tests::class ... ok
[INFO] [stdout] test tests::concat ... ok
[INFO] [stdout] test tests::empty_returns_nothing ... ok
[INFO] [stdout] test tests::max_length ... ok
[INFO] [stdout] test tests::byte_dot_all ... ok
[INFO] [stdout] test tests::literal ... ok
[INFO] [stdout] test tests::max_length_with_alternation_branches_of_unequal_length ... ok
[INFO] [stdout] test tests::max_length_with_fixed_parts ... ok
[INFO] [stdout] test tests::repetition_range ... ok
[INFO] [stdout] test tests::repetition_range_exactly ... ok
[INFO] [stdout] test tests::unfinished_alternation_branch_is_ignored ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 55 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/regen-f86170e990068d33
[INFO] [stderr]    Doc-tests regen
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - Generator::append_next (line 218) ... ok
[INFO] [stdout] test src/lib.rs - (line 19) ... ok
[INFO] [stdout] test src/lib.rs - Generator::new_with_options (line 188) ... ok
[INFO] [stdout] test src/lib.rs - Generator::new (line 175) ... ok
[INFO] [stdout] test src/lib.rs - (line 42) ... ok
[INFO] [stdout] test src/lib.rs - (line 57) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.85s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5bfedbaac14005911b9fbd9cc177b5233bbe405a1a4063619661f38374e9fafb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bfedbaac14005911b9fbd9cc177b5233bbe405a1a4063619661f38374e9fafb", kill_on_drop: false }`
[INFO] [stdout] 5bfedbaac14005911b9fbd9cc177b5233bbe405a1a4063619661f38374e9fafb