[INFO] fetching crate matchmaker 0.1.0...
[INFO] testing matchmaker-0.1.0 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate matchmaker 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate matchmaker 0.1.0 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matchmaker 0.1.0
[INFO] finished tweaking crates.io crate matchmaker 0.1.0
[INFO] tweaked toml for crates.io crate matchmaker 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate matchmaker 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", 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] 7f28c45fd525f4d5635d397b6ee03a6d7fe76682e5e3b195922fcb026b10e085
[INFO] running `Command { std: "docker" "start" "-a" "7f28c45fd525f4d5635d397b6ee03a6d7fe76682e5e3b195922fcb026b10e085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f28c45fd525f4d5635d397b6ee03a6d7fe76682e5e3b195922fcb026b10e085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f28c45fd525f4d5635d397b6ee03a6d7fe76682e5e3b195922fcb026b10e085", kill_on_drop: false }`
[INFO] [stdout] 7f28c45fd525f4d5635d397b6ee03a6d7fe76682e5e3b195922fcb026b10e085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1cd49d7c9338b7263759b35c43ba06137b958036e895ff6f953ebd92d369200f
[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" "1cd49d7c9338b7263759b35c43ba06137b958036e895ff6f953ebd92d369200f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling matchmaker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.64s
[INFO] running `Command { std: "docker" "inspect" "1cd49d7c9338b7263759b35c43ba06137b958036e895ff6f953ebd92d369200f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cd49d7c9338b7263759b35c43ba06137b958036e895ff6f953ebd92d369200f", kill_on_drop: false }`
[INFO] [stdout] 1cd49d7c9338b7263759b35c43ba06137b958036e895ff6f953ebd92d369200f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbf3c7a8ac1172a4ae11a920fc7e71211fbe1ec82e2d35b7b5a6882f11cfdb24
[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" "fbf3c7a8ac1172a4ae11a920fc7e71211fbe1ec82e2d35b7b5a6882f11cfdb24", kill_on_drop: false }`
[INFO] [stderr]    Compiling matchmaker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "fbf3c7a8ac1172a4ae11a920fc7e71211fbe1ec82e2d35b7b5a6882f11cfdb24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbf3c7a8ac1172a4ae11a920fc7e71211fbe1ec82e2d35b7b5a6882f11cfdb24", kill_on_drop: false }`
[INFO] [stdout] fbf3c7a8ac1172a4ae11a920fc7e71211fbe1ec82e2d35b7b5a6882f11cfdb24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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] fda1ad13dafcecbab66021d34f3fb1d03e6a4a7c4fe37b4437a534cfdc1ca23b
[INFO] running `Command { std: "docker" "start" "-a" "fda1ad13dafcecbab66021d34f3fb1d03e6a4a7c4fe37b4437a534cfdc1ca23b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/matchmaker-50bf478815fd9b01)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test da_stb::tests::assign_random_full ... ok
[INFO] [stdout] test da_stb::tests::test_assign_random_exclude ... ok
[INFO] [stdout] test da_stb::tests::test_draw_order ... ok
[INFO] [stdout] test da_stb::tests::test_assign_random ... ok
[INFO] [stderr]      Running tests/da_stb.rs (/opt/rustwide/target/debug/deps/da_stb-d21b17da48141952)
[INFO] [stdout] test da_stb::tests::test_place_students ... ok
[INFO] [stdout] test da_stb::tests::test_place_students_with_exclude ... ok
[INFO] [stdout] test da_stb::tests::test_truncate_categories ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test_match_students_to_multiple_categories_not_enough_places ... ok
[INFO] [stdout] test test_match_students_to_multiple_categories_more_than_enough_places ... ok
[INFO] [stdout] test test_match_students ... ok
[INFO] [stdout] test test_match_students_to_multiple_categories ... ok
[INFO] [stdout] test test_match_students_not_enough_places ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests matchmaker
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/lib.rs - Category::new (line 309) ... ok
[INFO] [stdout] test src/lib.rs - Student::new (line 199) ... ok
[INFO] [stdout] test src/lib.rs - Student::new (line 216) ... ok
[INFO] [stdout] test src/da_stb.rs - da_stb::match_students (line 157) ... ok
[INFO] [stdout] test src/lib.rs - (line 24) ... ok
[INFO] [stdout] test src/lib.rs - (line 97) ... ok
[INFO] [stdout] test src/da_stb.rs - da_stb::match_students_to_multiple_categories (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.96s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fda1ad13dafcecbab66021d34f3fb1d03e6a4a7c4fe37b4437a534cfdc1ca23b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fda1ad13dafcecbab66021d34f3fb1d03e6a4a7c4fe37b4437a534cfdc1ca23b", kill_on_drop: false }`
[INFO] [stdout] fda1ad13dafcecbab66021d34f3fb1d03e6a4a7c4fe37b4437a534cfdc1ca23b