[INFO] fetching crate round_robin 0.1.31...
[INFO] testing round_robin-0.1.31 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate round_robin 0.1.31 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate round_robin 0.1.31 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate round_robin 0.1.31
[INFO] finished tweaking crates.io crate round_robin 0.1.31
[INFO] tweaked toml for crates.io crate round_robin 0.1.31 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1b82adf091c71a5f225697596a70c8a60b3d8c9f8f67a8d1dcfef9413fdd54d
[INFO] running `Command { std: "docker" "start" "-a" "e1b82adf091c71a5f225697596a70c8a60b3d8c9f8f67a8d1dcfef9413fdd54d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1b82adf091c71a5f225697596a70c8a60b3d8c9f8f67a8d1dcfef9413fdd54d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1b82adf091c71a5f225697596a70c8a60b3d8c9f8f67a8d1dcfef9413fdd54d", kill_on_drop: false }`
[INFO] [stdout] e1b82adf091c71a5f225697596a70c8a60b3d8c9f8f67a8d1dcfef9413fdd54d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 507b1b9c662a1d40fa873a6ba28f565e8dd81ed30b3934a4e5df17275c21105c
[INFO] running `Command { std: "docker" "start" "-a" "507b1b9c662a1d40fa873a6ba28f565e8dd81ed30b3934a4e5df17275c21105c", kill_on_drop: false }`
[INFO] [stderr]    Compiling round_robin v0.1.31 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "507b1b9c662a1d40fa873a6ba28f565e8dd81ed30b3934a4e5df17275c21105c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "507b1b9c662a1d40fa873a6ba28f565e8dd81ed30b3934a4e5df17275c21105c", kill_on_drop: false }`
[INFO] [stdout] 507b1b9c662a1d40fa873a6ba28f565e8dd81ed30b3934a4e5df17275c21105c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2fa8834c94689df33190b65fc4bdbcabf2ca226e04a5662c01007b71ca507ce
[INFO] running `Command { std: "docker" "start" "-a" "b2fa8834c94689df33190b65fc4bdbcabf2ca226e04a5662c01007b71ca507ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling round_robin v0.1.31 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "b2fa8834c94689df33190b65fc4bdbcabf2ca226e04a5662c01007b71ca507ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2fa8834c94689df33190b65fc4bdbcabf2ca226e04a5662c01007b71ca507ce", kill_on_drop: false }`
[INFO] [stdout] b2fa8834c94689df33190b65fc4bdbcabf2ca226e04a5662c01007b71ca507ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7e0c7e3c856d20f730ef5329d4e2aa90278b3c8676b532d6c292375e022339c6
[INFO] running `Command { std: "docker" "start" "-a" "7e0c7e3c856d20f730ef5329d4e2aa90278b3c8676b532d6c292375e022339c6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/round_robin-fc4ff3bf61bfe329)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::count_of_rounds_equal_to_count_of_players_minus_1_or_double ... ok
[INFO] [stdout] test tests::does_not_accept_count_of_odd_players ... ok
[INFO] [stdout] test tests::first_round_has_first_versus_last ... ok
[INFO] [stdout] test tests::last_round_has_first_versus_second ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests round_robin
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - round_robin (line 11) ... FAILED
[INFO] [stdout] test src/lib.rs - round_robin (line 18) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - round_robin (line 11) stdout ----
[INFO] [stdout] error[E0423]: expected function, found crate `round_robin`
[INFO] [stdout]  --> src/lib.rs:12:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | let rounds1 = round_robin((1..= 4).collect(),false);
[INFO] [stdout]   |               ^^^^^^^^^^^ not a function
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this function instead
[INFO] [stdout]   |
[INFO] [stdout] 3 | use round_robin::round_robin;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - round_robin (line 18) stdout ----
[INFO] [stdout] error[E0423]: expected function, found crate `round_robin`
[INFO] [stdout]  --> src/lib.rs:19:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | let rounds2 = round_robin(vec!["a", "b", "c", "d"], false);
[INFO] [stdout]   |               ^^^^^^^^^^^ not a function
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this function instead
[INFO] [stdout]   |
[INFO] [stdout] 3 | use round_robin::round_robin;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - round_robin (line 11)
[INFO] [stdout]     src/lib.rs - round_robin (line 18)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "7e0c7e3c856d20f730ef5329d4e2aa90278b3c8676b532d6c292375e022339c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e0c7e3c856d20f730ef5329d4e2aa90278b3c8676b532d6c292375e022339c6", kill_on_drop: false }`
[INFO] [stdout] 7e0c7e3c856d20f730ef5329d4e2aa90278b3c8676b532d6c292375e022339c6