[INFO] fetching crate lambda_calculus 3.0.0...
[INFO] testing lambda_calculus-3.0.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate lambda_calculus 3.0.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate lambda_calculus 3.0.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0d851f1f734282815b20eb19daa3ed55348cd1efe2c791e68e7fcd1e07bf55c
[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" "a0d851f1f734282815b20eb19daa3ed55348cd1efe2c791e68e7fcd1e07bf55c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0d851f1f734282815b20eb19daa3ed55348cd1efe2c791e68e7fcd1e07bf55c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d851f1f734282815b20eb19daa3ed55348cd1efe2c791e68e7fcd1e07bf55c", kill_on_drop: false }`
[INFO] [stdout] a0d851f1f734282815b20eb19daa3ed55348cd1efe2c791e68e7fcd1e07bf55c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d104c6fda08cbea3bccf2a40b9613066bec2493faa29673912bf5b02022ea70
[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" "2d104c6fda08cbea3bccf2a40b9613066bec2493faa29673912bf5b02022ea70", 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 2.39s
[INFO] running `Command { std: "docker" "inspect" "2d104c6fda08cbea3bccf2a40b9613066bec2493faa29673912bf5b02022ea70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d104c6fda08cbea3bccf2a40b9613066bec2493faa29673912bf5b02022ea70", kill_on_drop: false }`
[INFO] [stdout] 2d104c6fda08cbea3bccf2a40b9613066bec2493faa29673912bf5b02022ea70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 379b0b186d3a857e759f0060f26b9816d9128901e906c9b1d698a7ca9ba28cc1
[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" "379b0b186d3a857e759f0060f26b9816d9128901e906c9b1d698a7ca9ba28cc1", 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 7.11s
[INFO] running `Command { std: "docker" "inspect" "379b0b186d3a857e759f0060f26b9816d9128901e906c9b1d698a7ca9ba28cc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "379b0b186d3a857e759f0060f26b9816d9128901e906c9b1d698a7ca9ba28cc1", kill_on_drop: false }`
[INFO] [stdout] 379b0b186d3a857e759f0060f26b9816d9128901e906c9b1d698a7ca9ba28cc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2f93673ed29a975a5752fce48c2bdfe12095915e5ab54f5e97addb62639a8464
[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" "2f93673ed29a975a5752fce48c2bdfe12095915e5ab54f5e97addb62639a8464", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 0.30s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lambda_calculus-6373fd19fff75446
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test term::tests::is_supercombinator ... ok
[INFO] [stdout] test term::tests::app_macro ... ok
[INFO] [stdout] test term::tests::abs_macro ... ok
[INFO] [stdout] test parser::tests::alternative_lambda_parsing ... ok
[INFO] [stdout] test parser::tests::tokenization_success_classic ... ok
[INFO] [stdout] test parser::tests::tokenization_success ... ok
[INFO] [stdout] test parser::tests::tokenization_error ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lists-58e6dc0e5aba1d7e
[INFO] [stdout] test term::tests::open_term_display ... ok
[INFO] [stdout] test parser::tests::parse_y ... ok
[INFO] [stdout] test term::tests::display_modes ... ok
[INFO] [stdout] test parser::tests::parse_blc ... ok
[INFO] [stdout] test parser::tests::parse_quine ... ok
[INFO] [stdout] test parser::tests::succ_ast ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test list_head ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/num-ab1a2f7290acf1b9
[INFO] [stdout] test list_tail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test church_sub ... ok
[INFO] [stdout] test church_max ... ok
[INFO] [stdout] test church_fac ... ok
[INFO] [stdout] test scott_add ... ok
[INFO] [stdout] test church_mul ... ok
[INFO] [stdout] test church_pow ... ok
[INFO] [stdout] test num_pred ... ok
[INFO] [stdout] test parigot_sub ... ok
[INFO] [stdout] test church_min ... ok
[INFO] [stdout] test parigot_mul ... ok
[INFO] [stdout] test church_add ... ok
[INFO] [stdout] test church_shl ... ok
[INFO] [stdout] test church_rem ... ok
[INFO] [stdout] test parigot_add ... ok
[INFO] [stdout] test num_succ ... ok
[INFO] [stdout] test church_quot ... ok
[INFO] [stdout] test stumpfu_mul ... ok
[INFO] [stdout] test scott_mul ... ok
[INFO] [stdout] test church_div ... ok
[INFO] [stdout] test stumpfu_add ... ok
[INFO] [stdout] test church_shr ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/option-af5cafb51c3a7ed6
[INFO] [stdout] test scott_pow ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test option_is_none ... ok
[INFO] [stdout] test option_and_then ... ok
[INFO] [stdout] test option_is_some ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/pair_list-52b01c116022e7fb
[INFO] [stdout] test option_map_or ... ok
[INFO] [stdout] test option_none ... ok
[INFO] [stdout] test option_some ... ok
[INFO] [stdout] test option_unwrap_or ... ok
[INFO] [stdout] test option_map ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test pair_list_list ... ok
[INFO] [stdout] test pair_list_append ... ok
[INFO] [stdout] test pair_list_head ... ok
[INFO] [stdout] test pair_list_tail ... ok
[INFO] [stdout] test pair_list_index ... ok
[INFO] [stdout] test pair_list_reverse ... ok
[INFO] [stdout] test pair_list_drop_while ... ok
[INFO] [stdout] test pair_list_length ... ok
[INFO] [stdout] test pair_list_replicate ... ok
[INFO] [stdout] test pair_list_drop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/reduction-ebf2dcd11b362da3
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test reduction_huge ... ignored
[INFO] [stdout] test reduction_app ... ok
[INFO] [stdout] test reduction_cbn ... ok
[INFO] [stdout] test reduction_cbv ... 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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/signed-c56ef25778dbfb01
[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] [stdout] test signed_add ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lambda_calculus
[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="encoding"' --cfg 'feature="default"' --extern lambda_calculus=/opt/rustwide/target/debug/deps/liblambda_calculus-37ed15c4c747deb3.rlib -C embed-bitcode=no` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "2f93673ed29a975a5752fce48c2bdfe12095915e5ab54f5e97addb62639a8464", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f93673ed29a975a5752fce48c2bdfe12095915e5ab54f5e97addb62639a8464", kill_on_drop: false }`
[INFO] [stdout] 2f93673ed29a975a5752fce48c2bdfe12095915e5ab54f5e97addb62639a8464