[INFO] fetching crate serializer 2.1.2...
[INFO] testing serializer-2.1.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate serializer 2.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate serializer 2.1.2
[INFO] finished tweaking crates.io crate serializer 2.1.2
[INFO] tweaked toml for crates.io crate serializer 2.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate serializer 2.1.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 1e41bab2cbcf2dad424cbb3b9c32c16a4d6e10dfc3917aa28b708539f23caba3
[INFO] running `Command { std: "docker" "start" "-a" "1e41bab2cbcf2dad424cbb3b9c32c16a4d6e10dfc3917aa28b708539f23caba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e41bab2cbcf2dad424cbb3b9c32c16a4d6e10dfc3917aa28b708539f23caba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e41bab2cbcf2dad424cbb3b9c32c16a4d6e10dfc3917aa28b708539f23caba3", kill_on_drop: false }`
[INFO] [stdout] 1e41bab2cbcf2dad424cbb3b9c32c16a4d6e10dfc3917aa28b708539f23caba3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 75b5d63d4b4c402662986f1d00fedf12440dc55f58d4edb011f2f4bc6578ea70
[INFO] running `Command { std: "docker" "start" "-a" "75b5d63d4b4c402662986f1d00fedf12440dc55f58d4edb011f2f4bc6578ea70", kill_on_drop: false }`
[INFO] [stderr]    Compiling serializer v2.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "75b5d63d4b4c402662986f1d00fedf12440dc55f58d4edb011f2f4bc6578ea70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75b5d63d4b4c402662986f1d00fedf12440dc55f58d4edb011f2f4bc6578ea70", kill_on_drop: false }`
[INFO] [stdout] 75b5d63d4b4c402662986f1d00fedf12440dc55f58d4edb011f2f4bc6578ea70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] e4ee9cb12aabbf6e3d6846043b032277e6f6de2a73cf06228867a287ca0949bd
[INFO] running `Command { std: "docker" "start" "-a" "e4ee9cb12aabbf6e3d6846043b032277e6f6de2a73cf06228867a287ca0949bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling serializer v2.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "e4ee9cb12aabbf6e3d6846043b032277e6f6de2a73cf06228867a287ca0949bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4ee9cb12aabbf6e3d6846043b032277e6f6de2a73cf06228867a287ca0949bd", kill_on_drop: false }`
[INFO] [stdout] e4ee9cb12aabbf6e3d6846043b032277e6f6de2a73cf06228867a287ca0949bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 68fd8bd2fcaba2a5658a6112f7e71f591b5e586d8754caab8cff9f4a275f49fd
[INFO] running `Command { std: "docker" "start" "-a" "68fd8bd2fcaba2a5658a6112f7e71f591b5e586d8754caab8cff9f4a275f49fd", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serializer-48679d839f2a9773)
[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] [stderr]    Doc-tests serializer
[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" "68fd8bd2fcaba2a5658a6112f7e71f591b5e586d8754caab8cff9f4a275f49fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68fd8bd2fcaba2a5658a6112f7e71f591b5e586d8754caab8cff9f4a275f49fd", kill_on_drop: false }`
[INFO] [stdout] 68fd8bd2fcaba2a5658a6112f7e71f591b5e586d8754caab8cff9f4a275f49fd