[INFO] fetching crate rctree 0.4.0...
[INFO] testing rctree-0.4.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate rctree 0.4.0 into /workspace/builds/worker-65/source
[INFO] validating manifest of crates.io crate rctree 0.4.0 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 rctree 0.4.0
[INFO] finished tweaking crates.io crate rctree 0.4.0
[INFO] tweaked toml for crates.io crate rctree 0.4.0 written to /workspace/builds/worker-65/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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] fc7985d41f99c2a2b202b8626e07e75fc5d60cbd307d547f3edcb513ecc296a4
[INFO] running `Command { std: "docker" "start" "-a" "fc7985d41f99c2a2b202b8626e07e75fc5d60cbd307d547f3edcb513ecc296a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc7985d41f99c2a2b202b8626e07e75fc5d60cbd307d547f3edcb513ecc296a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc7985d41f99c2a2b202b8626e07e75fc5d60cbd307d547f3edcb513ecc296a4", kill_on_drop: false }`
[INFO] [stdout] fc7985d41f99c2a2b202b8626e07e75fc5d60cbd307d547f3edcb513ecc296a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] 455fdc3a798b663ef820102ae7955062d8aff7a82761980f7dc35283cd4b89d4
[INFO] running `Command { std: "docker" "start" "-a" "455fdc3a798b663ef820102ae7955062d8aff7a82761980f7dc35283cd4b89d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "455fdc3a798b663ef820102ae7955062d8aff7a82761980f7dc35283cd4b89d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "455fdc3a798b663ef820102ae7955062d8aff7a82761980f7dc35283cd4b89d4", kill_on_drop: false }`
[INFO] [stdout] 455fdc3a798b663ef820102ae7955062d8aff7a82761980f7dc35283cd4b89d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] 88c1e42c90dea91d8d590f3e85e8990406898577c21bb53894905d95e7038a35
[INFO] running `Command { std: "docker" "start" "-a" "88c1e42c90dea91d8d590f3e85e8990406898577c21bb53894905d95e7038a35", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "88c1e42c90dea91d8d590f3e85e8990406898577c21bb53894905d95e7038a35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88c1e42c90dea91d8d590f3e85e8990406898577c21bb53894905d95e7038a35", kill_on_drop: false }`
[INFO] [stdout] 88c1e42c90dea91d8d590f3e85e8990406898577c21bb53894905d95e7038a35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] 5642904ed3beecef2df650a159069cb26a5c3f6d65406581afce31d8972fc048
[INFO] running `Command { std: "docker" "start" "-a" "5642904ed3beecef2df650a159069cb26a5c3f6d65406581afce31d8972fc048", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rctree-87e7e742c76f7936)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-1cdd7ac026d9c896)
[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] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test children_1 ... ok
[INFO] [stdout] test traverse_1 ... ok
[INFO] [stdout] test weak_1 ... ok
[INFO] [stdout] test make_deep_copy_1 ... ok
[INFO] [stdout] test weak_2 ... ok
[INFO] [stdout] test make_copy_1 ... ok
[INFO] [stdout] test children_2 ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test traverse_2 ... ok
[INFO] [stdout] test append_1 - should panic ... ok
[INFO] [stdout] test insert_after_1 - should panic ... ok
[INFO] [stdout] test insert_before_1 - should panic ... ok
[INFO] [stdout] test iter_1 - should panic ... ok
[INFO] [stdout] test prepend_1 - should panic ... ok
[INFO] [stdout] test stack_overflow ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.11s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rctree
[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" "5642904ed3beecef2df650a159069cb26a5c3f6d65406581afce31d8972fc048", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5642904ed3beecef2df650a159069cb26a5c3f6d65406581afce31d8972fc048", kill_on_drop: false }`
[INFO] [stdout] 5642904ed3beecef2df650a159069cb26a5c3f6d65406581afce31d8972fc048