[INFO] fetching crate welder 0.3.0...
[INFO] testing welder-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate welder 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate welder 0.3.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate welder 0.3.0
[INFO] finished tweaking crates.io crate welder 0.3.0
[INFO] tweaked toml for crates.io crate welder 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f9282030e2c7f852621519c4fedc6353442dd1bc657f962dbacbe93bb3710e6
[INFO] running `Command { std: "docker" "start" "-a" "2f9282030e2c7f852621519c4fedc6353442dd1bc657f962dbacbe93bb3710e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f9282030e2c7f852621519c4fedc6353442dd1bc657f962dbacbe93bb3710e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f9282030e2c7f852621519c4fedc6353442dd1bc657f962dbacbe93bb3710e6", kill_on_drop: false }`
[INFO] [stdout] 2f9282030e2c7f852621519c4fedc6353442dd1bc657f962dbacbe93bb3710e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a394220b5a337bf8c99031208d28097f83a4eb209899e23a5307e6e87bb5161c
[INFO] running `Command { std: "docker" "start" "-a" "a394220b5a337bf8c99031208d28097f83a4eb209899e23a5307e6e87bb5161c", kill_on_drop: false }`
[INFO] [stderr]    Compiling welder v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "a394220b5a337bf8c99031208d28097f83a4eb209899e23a5307e6e87bb5161c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a394220b5a337bf8c99031208d28097f83a4eb209899e23a5307e6e87bb5161c", kill_on_drop: false }`
[INFO] [stdout] a394220b5a337bf8c99031208d28097f83a4eb209899e23a5307e6e87bb5161c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 689a39c1e2a1da73b77f3cda404b84712915c349354c4d949cbe1d544c1b58b7
[INFO] running `Command { std: "docker" "start" "-a" "689a39c1e2a1da73b77f3cda404b84712915c349354c4d949cbe1d544c1b58b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling welder v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "689a39c1e2a1da73b77f3cda404b84712915c349354c4d949cbe1d544c1b58b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "689a39c1e2a1da73b77f3cda404b84712915c349354c4d949cbe1d544c1b58b7", kill_on_drop: false }`
[INFO] [stdout] 689a39c1e2a1da73b77f3cda404b84712915c349354c4d949cbe1d544c1b58b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 43986dcd5ac1592722105351389804306868b5658d05ee06fd726c021d97961e
[INFO] running `Command { std: "docker" "start" "-a" "43986dcd5ac1592722105351389804306868b5658d05ee06fd726c021d97961e", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/welder-6aed0b5298e07859)
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::vec_welder_multiple ... ok
[INFO] [stderr]    Doc-tests welder
[INFO] [stdout] test tests::string_welder_from_base ... ok
[INFO] [stdout] test tests::string_welder_multiple ... ok
[INFO] [stdout] test tests::string_welder ... ok
[INFO] [stdout] test tests::vec_welder_chain ... ok
[INFO] [stdout] test tests::string_welder_chain ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elems (line 184) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elems_no_glue (line 130) ... ok
[INFO] [stdout] test src/lib.rs - (line 19) ... ok
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elem_glue_both (line 305) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::new (line 45) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elem_glue_left (line 256) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::with_start (line 65) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elem (line 160) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elems_glue_both (line 330) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elem_glue_right (line 206) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::weld (line 88) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elems_glue_right (line 230) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elem_no_glue (line 107) ... ok
[INFO] [stdout] test src/lib.rs - Welder<G, T>::elems_glue_left (line 280) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.77s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "43986dcd5ac1592722105351389804306868b5658d05ee06fd726c021d97961e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43986dcd5ac1592722105351389804306868b5658d05ee06fd726c021d97961e", kill_on_drop: false }`
[INFO] [stdout] 43986dcd5ac1592722105351389804306868b5658d05ee06fd726c021d97961e