[INFO] fetching crate lambda_calculus 3.0.0...
[INFO] testing lambda_calculus-3.0.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate lambda_calculus 3.0.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate lambda_calculus 3.0.0 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 lambda_calculus 3.0.0
[INFO] finished tweaking crates.io crate lambda_calculus 3.0.0
[INFO] tweaked toml for crates.io crate lambda_calculus 3.0.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] fcb6001fd00321bc296c7711a59df1f4063de6e73009d8d18e6cae0a25e4b94a
[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" "fcb6001fd00321bc296c7711a59df1f4063de6e73009d8d18e6cae0a25e4b94a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcb6001fd00321bc296c7711a59df1f4063de6e73009d8d18e6cae0a25e4b94a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcb6001fd00321bc296c7711a59df1f4063de6e73009d8d18e6cae0a25e4b94a", kill_on_drop: false }`
[INFO] [stdout] fcb6001fd00321bc296c7711a59df1f4063de6e73009d8d18e6cae0a25e4b94a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stdout] cbb50a56eadbc64753c2a1f8ee53446f8601181610ddd637faacc65873fac989
[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" "cbb50a56eadbc64753c2a1f8ee53446f8601181610ddd637faacc65873fac989", kill_on_drop: false }`
[INFO] [stderr]    Compiling lambda_calculus v3.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/reduction.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         mem::replace(self, ret.unabs().unwrap()); // move unabstracted self back to its place
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/reduction.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         mem::replace(self, lhs); // move self back to its place
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `Command { std: "docker" "inspect" "cbb50a56eadbc64753c2a1f8ee53446f8601181610ddd637faacc65873fac989", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbb50a56eadbc64753c2a1f8ee53446f8601181610ddd637faacc65873fac989", kill_on_drop: false }`
[INFO] [stdout] cbb50a56eadbc64753c2a1f8ee53446f8601181610ddd637faacc65873fac989
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 8dd6de0f9834a45626088a71723280a035322815fa5ea2ac1403172ec18dec83
[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" "8dd6de0f9834a45626088a71723280a035322815fa5ea2ac1403172ec18dec83", kill_on_drop: false }`
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/reduction.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         mem::replace(self, ret.unabs().unwrap()); // move unabstracted self back to its place
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lambda_calculus v3.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/reduction.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         mem::replace(self, lhs); // move self back to its place
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/reduction.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         mem::replace(self, ret.unabs().unwrap()); // move unabstracted self back to its place
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/reduction.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         mem::replace(self, lhs); // move self back to its place
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.09s
[INFO] running `Command { std: "docker" "inspect" "8dd6de0f9834a45626088a71723280a035322815fa5ea2ac1403172ec18dec83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dd6de0f9834a45626088a71723280a035322815fa5ea2ac1403172ec18dec83", kill_on_drop: false }`
[INFO] [stdout] 8dd6de0f9834a45626088a71723280a035322815fa5ea2ac1403172ec18dec83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be48646428013451f1efcdbd272f0540e69b4f79585608df4eb9bbd29179c264
[INFO] running `Command { std: "docker" "start" "-a" "be48646428013451f1efcdbd272f0540e69b4f79585608df4eb9bbd29179c264", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/reduction.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         mem::replace(self, ret.unabs().unwrap()); // move unabstracted self back to its place
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/reduction.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |         mem::replace(self, lhs); // move self back to its place
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/reduction.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         mem::replace(self, ret.unabs().unwrap()); // move unabstracted self back to its place
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/reduction.rs:123:9
[INFO] [stderr]     |
[INFO] [stderr] 123 |         mem::replace(self, lhs); // move self back to its place
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lambda_calculus-bc39f301a98c6050
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test parser::tests::alternative_lambda_parsing ... ok
[INFO] [stdout] test parser::tests::parse_blc ... ok
[INFO] [stdout] test parser::tests::tokenization_error ... ok
[INFO] [stdout] test parser::tests::tokenization_success ... ok
[INFO] [stdout] test term::tests::is_supercombinator ... ok
[INFO] [stdout] test parser::tests::succ_ast ... ok
[INFO] [stdout] test parser::tests::tokenization_success_classic ... ok
[INFO] [stdout] test parser::tests::parse_y ... ok
[INFO] [stdout] test parser::tests::parse_quine ... ok
[INFO] [stdout] test term::tests::display_modes ... ok
[INFO] [stdout] test term::tests::open_term_display ... ok
[INFO] [stdout] test term::tests::abs_macro ... ok
[INFO] [stdout] test term::tests::app_macro ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lists-f4c15bb64f033d34
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test list_tail ... ok
[INFO] [stdout] test list_head ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/num-be1bc31bcfb1a16f
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test church_add ... ok
[INFO] [stdout] test church_mul ... ok
[INFO] [stdout] test church_min ... ok
[INFO] [stdout] test church_fac ... ok
[INFO] [stdout] test church_max ... ok
[INFO] [stdout] test num_succ ... ok
[INFO] [stdout] test church_pow ... ok
[INFO] [stdout] test parigot_mul ... ok
[INFO] [stdout] test church_quot ... ok
[INFO] [stdout] test church_sub ... ok
[INFO] [stdout] test num_pred ... ok
[INFO] [stdout] test stumpfu_mul ... ok
[INFO] [stdout] test church_rem ... ok
[INFO] [stdout] test church_div ... ok
[INFO] [stdout] test stumpfu_add ... ok
[INFO] [stdout] test parigot_add ... ok
[INFO] [stdout] test scott_add ... ok
[INFO] [stdout] test parigot_sub ... ok
[INFO] [stdout] test church_shl ... ok
[INFO] [stdout] test scott_mul ... ok
[INFO] [stdout] test scott_pow ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/option-e06379b74a9fe04c
[INFO] [stdout] test church_shr ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.11s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/pair_list-892188bd405e65ab
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test option_map ... ok
[INFO] [stdout] test option_is_none ... ok
[INFO] [stdout] test option_some ... ok
[INFO] [stdout] test option_unwrap_or ... ok
[INFO] [stdout] test option_none ... ok
[INFO] [stdout] test option_is_some ... ok
[INFO] [stdout] test option_map_or ... ok
[INFO] [stdout] test option_and_then ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test pair_list_head ... ok
[INFO] [stdout] test pair_list_tail ... ok
[INFO] [stdout] test pair_list_length ... ok
[INFO] [stdout] test pair_list_drop_while ... ok
[INFO] [stdout] test pair_list_replicate ... ok
[INFO] [stdout] test pair_list_index ... ok
[INFO] [stdout] test pair_list_list ... ok
[INFO] [stdout] test pair_list_drop ... ok
[INFO] [stdout] test pair_list_reverse ... ok
[INFO] [stdout] test pair_list_append ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/reduction-4269dda7f50ca054
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test reduction_huge ... ignored
[INFO] [stdout] test reduction_cbn ... ok
[INFO] [stdout] test reduction_cbv ... ok
[INFO] [stdout] test reduction_app ... ok
[INFO] [stdout] test reduction_nor ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/signed-8171d2b5b8d5a8f4
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test signed_neg ... ok
[INFO] [stdout] test signed_modulus ... ok
[INFO] [stdout] test signed_mul ... ok
[INFO] [stdout] test signed_simplify ... ok
[INFO] [stdout] test signed_sub ... ok
[INFO] [stderr]    Doc-tests lambda_calculus
[INFO] [stdout] test signed_add ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --test /opt/rustwide/workdir/src/lib.rs --crate-name lambda_calculus -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cfg 'feature="default"' --cfg 'feature="encoding"' --extern lambda_calculus=/opt/rustwide/target/debug/deps/liblambda_calculus-5979feb789d27452.rlib -C embed-bitcode=no` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "be48646428013451f1efcdbd272f0540e69b4f79585608df4eb9bbd29179c264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be48646428013451f1efcdbd272f0540e69b4f79585608df4eb9bbd29179c264", kill_on_drop: false }`
[INFO] [stdout] be48646428013451f1efcdbd272f0540e69b4f79585608df4eb9bbd29179c264