[INFO] fetching crate mathkid 0.4.0...
[INFO] testing mathkid-0.4.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate mathkid 0.4.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate mathkid 0.4.0
[INFO] finished tweaking crates.io crate mathkid 0.4.0
[INFO] tweaked toml for crates.io crate mathkid 0.4.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mathkid 0.4.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mathkid 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded home v0.5.3
[INFO] [stderr]   Downloaded tinyrand-std v0.5.0
[INFO] [stderr]   Downloaded textwrap v0.15.1
[INFO] [stderr]   Downloaded tinyrand v0.5.0
[INFO] [stderr]   Downloaded unidecode v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.133
[INFO] [stderr]   Downloaded syn v1.0.100
[INFO] [stderr]   Downloaded unicode-ident v1.0.4
[INFO] [stderr]   Downloaded tinyrand-alloc v0.5.0
[INFO] [stderr]   Downloaded clap_derive v3.2.18
[INFO] [stderr]   Downloaded os_str_bytes v6.3.0
[INFO] [stderr]   Downloaded clap v3.2.22
[INFO] [stderr]   Downloaded once_cell v1.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d467f6403573219e2b788db632e45a05492482e343f3e2752ad412ed53d55f9
[INFO] running `Command { std: "docker" "start" "-a" "7d467f6403573219e2b788db632e45a05492482e343f3e2752ad412ed53d55f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d467f6403573219e2b788db632e45a05492482e343f3e2752ad412ed53d55f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d467f6403573219e2b788db632e45a05492482e343f3e2752ad412ed53d55f9", kill_on_drop: false }`
[INFO] [stdout] 7d467f6403573219e2b788db632e45a05492482e343f3e2752ad412ed53d55f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d3710b388d6d36c247ea94c1db4dc1abdabc3ece8f98c522833a482fadb2785
[INFO] running `Command { std: "docker" "start" "-a" "5d3710b388d6d36c247ea94c1db4dc1abdabc3ece8f98c522833a482fadb2785", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling os_str_bytes v6.3.0
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling textwrap v0.15.1
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling itoa v1.0.3
[INFO] [stderr]    Compiling tinyrand v0.5.0
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling unidecode v0.3.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling tinyrand-std v0.5.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]    Compiling clap v3.2.22
[INFO] [stderr]    Compiling mathkid v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.01s
[INFO] running `Command { std: "docker" "inspect" "5d3710b388d6d36c247ea94c1db4dc1abdabc3ece8f98c522833a482fadb2785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d3710b388d6d36c247ea94c1db4dc1abdabc3ece8f98c522833a482fadb2785", kill_on_drop: false }`
[INFO] [stdout] 5d3710b388d6d36c247ea94c1db4dc1abdabc3ece8f98c522833a482fadb2785
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53a2dcba12c97f15bc9ffe3f692240efb710e23d32e8d68717a3ffc3cce9b83f
[INFO] running `Command { std: "docker" "start" "-a" "53a2dcba12c97f15bc9ffe3f692240efb710e23d32e8d68717a3ffc3cce9b83f", kill_on_drop: false }`
[INFO] [stderr]    Compiling tinyrand-alloc v0.5.0
[INFO] [stderr]    Compiling mathkid v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `Command { std: "docker" "inspect" "53a2dcba12c97f15bc9ffe3f692240efb710e23d32e8d68717a3ffc3cce9b83f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53a2dcba12c97f15bc9ffe3f692240efb710e23d32e8d68717a3ffc3cce9b83f", kill_on_drop: false }`
[INFO] [stdout] 53a2dcba12c97f15bc9ffe3f692240efb710e23d32e8d68717a3ffc3cce9b83f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fcd63bcc2f5a9434f2ba931b52eb63d9f9c001e7831bece7aa887cb8b78bb1a7
[INFO] running `Command { std: "docker" "start" "-a" "fcd63bcc2f5a9434f2ba931b52eb63d9f9c001e7831bece7aa887cb8b78bb1a7", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mathkid-76052c9df9655ce7)
[INFO] [stdout] running 18 tests
[INFO] [stdout] test profile::tests::profile_from_json ... ok
[INFO] [stdout] test profile::tests::profile_to_json ... ok
[INFO] [stdout] test topic::tests::outcome_implements_debug ... ok
[INFO] [stdout] test profile::tests::test_sanitised_first_name ... ok
[INFO] [stdout] test syllabus::tests::course_get_topic_names ... ok
[INFO] [stdout] test syllabus::tests::presets ... ok
[INFO] [stdout] test syllabus::tests::syllabus_get_topic_names ... ok
[INFO] [stdout] test topic::addition::tests::display_ask_answer ... ok
[INFO] [stdout] test topic::addition::tests::name ... ok
[INFO] [stdout] test topic::addition::tests::presets ... ok
[INFO] [stdout] test topic::subtraction::tests::display_ask_answer_negative ... ok
[INFO] [stdout] test topic::subtraction::tests::display_ask_answer_nonnegative ... ok
[INFO] [stdout] test topic::subtraction::tests::invalid_config ... ok
[INFO] [stdout] test topic::subtraction::tests::name ... ok
[INFO] [stdout] test topic::subtraction::tests::presets ... ok
[INFO] [stdout] test profile::tests::profile_implements_debug ... ok
[INFO] [stdout] test topic::subtraction::tests::question_with_zero_nonnegative ... ok
[INFO] [stdout] test topic::addition::tests::invalid_config ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stderr]      Running unittests src/bin/mathkid.rs (/opt/rustwide/target/debug/deps/mathkid-3f2be69f9802dfc1)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mathkid
[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 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] running `Command { std: "docker" "inspect" "fcd63bcc2f5a9434f2ba931b52eb63d9f9c001e7831bece7aa887cb8b78bb1a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcd63bcc2f5a9434f2ba931b52eb63d9f9c001e7831bece7aa887cb8b78bb1a7", kill_on_drop: false }`
[INFO] [stdout] fcd63bcc2f5a9434f2ba931b52eb63d9f9c001e7831bece7aa887cb8b78bb1a7