[INFO] fetching crate empty-fallback-chain 2.0.0...
[INFO] testing empty-fallback-chain-2.0.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate empty-fallback-chain 2.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate empty-fallback-chain 2.0.0
[INFO] finished tweaking crates.io crate empty-fallback-chain 2.0.0
[INFO] tweaked toml for crates.io crate empty-fallback-chain 2.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate empty-fallback-chain 2.0.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate empty-fallback-chain 2.0.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47173a88f626f997b6e3aa729862d471939663a552fad117f49abc49cc1ea412
[INFO] running `Command { std: "docker" "start" "-a" "47173a88f626f997b6e3aa729862d471939663a552fad117f49abc49cc1ea412", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47173a88f626f997b6e3aa729862d471939663a552fad117f49abc49cc1ea412", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47173a88f626f997b6e3aa729862d471939663a552fad117f49abc49cc1ea412", kill_on_drop: false }`
[INFO] [stdout] 47173a88f626f997b6e3aa729862d471939663a552fad117f49abc49cc1ea412
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b9da5d6c1f56ed58ae2cc6bcce6f4f7c68c0d30840bd73d2ebf64cb6897a4ff
[INFO] running `Command { std: "docker" "start" "-a" "5b9da5d6c1f56ed58ae2cc6bcce6f4f7c68c0d30840bd73d2ebf64cb6897a4ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling empty-fallback-chain v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "5b9da5d6c1f56ed58ae2cc6bcce6f4f7c68c0d30840bd73d2ebf64cb6897a4ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b9da5d6c1f56ed58ae2cc6bcce6f4f7c68c0d30840bd73d2ebf64cb6897a4ff", kill_on_drop: false }`
[INFO] [stdout] 5b9da5d6c1f56ed58ae2cc6bcce6f4f7c68c0d30840bd73d2ebf64cb6897a4ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52c8b3429f074f247da87a0f7088ae2bc3a5e39d01e35f6f37b6251cf1fbcf89
[INFO] running `Command { std: "docker" "start" "-a" "52c8b3429f074f247da87a0f7088ae2bc3a5e39d01e35f6f37b6251cf1fbcf89", kill_on_drop: false }`
[INFO] [stderr]    Compiling empty-fallback-chain v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "52c8b3429f074f247da87a0f7088ae2bc3a5e39d01e35f6f37b6251cf1fbcf89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52c8b3429f074f247da87a0f7088ae2bc3a5e39d01e35f6f37b6251cf1fbcf89", kill_on_drop: false }`
[INFO] [stdout] 52c8b3429f074f247da87a0f7088ae2bc3a5e39d01e35f6f37b6251cf1fbcf89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 97c95abe1b29ddf82d33b6fe8fa467cf52a31cb95aa27f5b46c40c031e79a1f5
[INFO] running `Command { std: "docker" "start" "-a" "97c95abe1b29ddf82d33b6fe8fa467cf52a31cb95aa27f5b46c40c031e79a1f5", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/empty_fallback_chain-ba486a1aa8b43db6)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::chained_priority_basics ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests empty_fallback_chain
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test src/lib.rs - IteratorExt::empty_fallback_chain (line 436) ... ok
[INFO] [stdout] test src/lib.rs - pre_empty_fallback_chain (line 40) ... ok
[INFO] [stdout] test src/lib.rs - IteratorExt::maybe_empty_fallback_chain (line 619) ... ok
[INFO] [stdout] test src/lib.rs - IteratorExt::maybe_empty_fallback_chain (line 604) ... ok
[INFO] [stdout] test src/lib.rs - (line 9) ... ok
[INFO] [stdout] test src/lib.rs - (line 23) ... ok
[INFO] [stdout] test src/lib.rs - IteratorExt::empty_fallback_chain (line 468) ... ok
[INFO] [stdout] test src/lib.rs - IteratorExt::empty_fallback_chain (line 486) ... ok
[INFO] [stdout] test src/lib.rs - IteratorExt::empty_fallback_chain (line 447) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.83s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "97c95abe1b29ddf82d33b6fe8fa467cf52a31cb95aa27f5b46c40c031e79a1f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97c95abe1b29ddf82d33b6fe8fa467cf52a31cb95aa27f5b46c40c031e79a1f5", kill_on_drop: false }`
[INFO] [stdout] 97c95abe1b29ddf82d33b6fe8fa467cf52a31cb95aa27f5b46c40c031e79a1f5