[INFO] fetching crate mdl_monkey 1.0.0...
[INFO] testing mdl_monkey-1.0.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate mdl_monkey 1.0.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate mdl_monkey 1.0.0 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 mdl_monkey 1.0.0
[INFO] finished tweaking crates.io crate mdl_monkey 1.0.0
[INFO] tweaked toml for crates.io crate mdl_monkey 1.0.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate mdl_monkey 1.0.0 already has a lockfile, it will not be regenerated
[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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 3987ba29cec48094e2483cbf7b5d0025eddea36ca82637c34e962f81adda9502
[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" "3987ba29cec48094e2483cbf7b5d0025eddea36ca82637c34e962f81adda9502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3987ba29cec48094e2483cbf7b5d0025eddea36ca82637c34e962f81adda9502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3987ba29cec48094e2483cbf7b5d0025eddea36ca82637c34e962f81adda9502", kill_on_drop: false }`
[INFO] [stdout] 3987ba29cec48094e2483cbf7b5d0025eddea36ca82637c34e962f81adda9502
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 79a048f4e8b8179bf731cab029e5616db10adf2e7072c25eae18688064b4fee4
[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" "79a048f4e8b8179bf731cab029e5616db10adf2e7072c25eae18688064b4fee4", kill_on_drop: false }`
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling mdl_monkey v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.62s
[INFO] running `Command { std: "docker" "inspect" "79a048f4e8b8179bf731cab029e5616db10adf2e7072c25eae18688064b4fee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79a048f4e8b8179bf731cab029e5616db10adf2e7072c25eae18688064b4fee4", kill_on_drop: false }`
[INFO] [stdout] 79a048f4e8b8179bf731cab029e5616db10adf2e7072c25eae18688064b4fee4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e35c442286cf5d79011fd1b69472f660f3aea33aea68087519a93f22f878d062
[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" "e35c442286cf5d79011fd1b69472f660f3aea33aea68087519a93f22f878d062", kill_on_drop: false }`
[INFO] [stderr]    Compiling mdl_monkey v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> tests/evaluator.rs:289:57
[INFO] [stdout]     |
[INFO] [stdout] 289 |     .expect_err("expected an error but none was found");;
[INFO] [stdout]     |                                                         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.87s
[INFO] running `Command { std: "docker" "inspect" "e35c442286cf5d79011fd1b69472f660f3aea33aea68087519a93f22f878d062", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e35c442286cf5d79011fd1b69472f660f3aea33aea68087519a93f22f878d062", kill_on_drop: false }`
[INFO] [stdout] e35c442286cf5d79011fd1b69472f660f3aea33aea68087519a93f22f878d062
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 1a30176109447ad36d19c7c6d344b424f61a01ed4daa96bb05a405faeea184d8
[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" "1a30176109447ad36d19c7c6d344b424f61a01ed4daa96bb05a405faeea184d8", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> tests/evaluator.rs:289:57
[INFO] [stderr]     |
[INFO] [stderr] 289 |     .expect_err("expected an error but none was found");;
[INFO] [stderr]     |                                                         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mdl_monkey-e4d9f90879908e20
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/monkey-4b2cc497c20801eb
[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
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ast-5bc9bc33086bd51a
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/evaluator-db137fdc11d5472b
[INFO] [stdout] test ast_display ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 27 tests
[INFO] [stdout] test evaluate_builtin_len_errors ... ok
[INFO] [stdout] test evaluate_builtin_push ... ok
[INFO] [stdout] test evaluate_builtin_last_errors ... ok
[INFO] [stdout] test evaluate_builtin_push_errors ... ok
[INFO] [stdout] test evaluate_builtin_len ... ok
[INFO] [stdout] test evaluate_builtin_last ... ok
[INFO] [stdout] test evaluate_builtin_rest ... ok
[INFO] [stdout] test evaluate_boolean_expression ... ok
[INFO] [stdout] test evaluate_array_index_objects ... ok
[INFO] [stdout] test evaluate_array_object ... ok
[INFO] [stdout] test evaluate_builtin_first_errors ... ok
[INFO] [stdout] test evaluate_function_object ... ok
[INFO] [stdout] test evaluate_builtin_first ... ok
[INFO] [stdout] test evaluate_let_statement_unknown_identifier ... ok
[INFO] [stdout] test evaluate_hash_index_objects ... ok
[INFO] [stdout] test evaluate_hash_objects ... ok
[INFO] [stdout] test evaluate_if_expression ... ok
[INFO] [stdout] test evaluate_index_objects_errors ... ok
[INFO] [stdout] test evaluate_function_application_error ... ok
[INFO] [stdout] test evaluate_integer_expression ... ok
[INFO] [stdout] test evaluate_function_application ... ok
[INFO] [stdout] test evaluate_float_expression ... ok
[INFO] [stdout] test evaluate_string_expression ... ok
[INFO] [stdout] test evaluate_let_statement ... ok
[INFO] [stdout] test evaluate_builtin_rest_errors ... ok
[INFO] [stdout] test evaluate_prefix_expression ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lexer-a7c4855227d727b8
[INFO] [stdout] test evaluate_return_statement ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 27 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test lex_string_unexpected_eof ... ok
[INFO] [stdout] test lex_illegal_number ... ok
[INFO] [stdout] test lex_illegal_number_radix ... ok
[INFO] [stdout] test lex_integer_literals ... ok
[INFO] [stdout] test lex_next_token ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/parser-e33bed8edc4d6eb2
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test parse_infix_boolean_expressions ... ok
[INFO] [stdout] test parse_infix_integer_expressions ... ok
[INFO] [stdout] test parse_array_literal ... ok
[INFO] [stdout] test parse_integer_literal_expression ... ok
[INFO] [stdout] test parse_string_expression ... ok
[INFO] [stdout] test parse_float_literal_expression ... ok
[INFO] [stdout] test parse_if_expressions ... ok
[INFO] [stdout] test parse_prefix_boolean_expressions ... ok
[INFO] [stdout] test parse_prefix_integer_expressions ... ok
[INFO] [stdout] test parse_operator_precedence ... ok
[INFO] [stdout] test parse_identifier_expression ... ok
[INFO] [stdout] test parse_statements ... ok
[INFO] [stdout] test parse_function_literals ... ok
[INFO] [stdout] test parse_call_expressions ... ok
[INFO] [stdout] test parse_hash_expressions ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/token-326e04f79e075a17
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests mdl_monkey
[INFO] [stdout] test token_display ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1a30176109447ad36d19c7c6d344b424f61a01ed4daa96bb05a405faeea184d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a30176109447ad36d19c7c6d344b424f61a01ed4daa96bb05a405faeea184d8", kill_on_drop: false }`
[INFO] [stdout] 1a30176109447ad36d19c7c6d344b424f61a01ed4daa96bb05a405faeea184d8