[INFO] fetching crate mutcursor 0.4.0...
[INFO] testing mutcursor-0.4.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate mutcursor 0.4.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate mutcursor 0.4.0
[INFO] finished tweaking crates.io crate mutcursor 0.4.0
[INFO] tweaked toml for crates.io crate mutcursor 0.4.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mutcursor 0.4.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "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" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded maybe-dangling v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 246f852408f312b0b01a8541e466c7fb151ea10db53c7bdb318dd6146849f76d
[INFO] running `Command { std: "docker" "start" "-a" "246f852408f312b0b01a8541e466c7fb151ea10db53c7bdb318dd6146849f76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "246f852408f312b0b01a8541e466c7fb151ea10db53c7bdb318dd6146849f76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "246f852408f312b0b01a8541e466c7fb151ea10db53c7bdb318dd6146849f76d", kill_on_drop: false }`
[INFO] [stdout] 246f852408f312b0b01a8541e466c7fb151ea10db53c7bdb318dd6146849f76d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55d6e3d6384e21bd41596edf16a6f11fff4e36a778a2234ff6a8c31662b27f88
[INFO] running `Command { std: "docker" "start" "-a" "55d6e3d6384e21bd41596edf16a6f11fff4e36a778a2234ff6a8c31662b27f88", kill_on_drop: false }`
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling maybe-dangling v0.1.2
[INFO] [stderr]    Compiling mutcursor v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "55d6e3d6384e21bd41596edf16a6f11fff4e36a778a2234ff6a8c31662b27f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d6e3d6384e21bd41596edf16a6f11fff4e36a778a2234ff6a8c31662b27f88", kill_on_drop: false }`
[INFO] [stdout] 55d6e3d6384e21bd41596edf16a6f11fff4e36a778a2234ff6a8c31662b27f88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74d7c2160317289fc8afffd2338a5ad29feaf8254775caf1389b78e2fd20e3e6
[INFO] running `Command { std: "docker" "start" "-a" "74d7c2160317289fc8afffd2338a5ad29feaf8254775caf1389b78e2fd20e3e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling mutcursor v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "74d7c2160317289fc8afffd2338a5ad29feaf8254775caf1389b78e2fd20e3e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74d7c2160317289fc8afffd2338a5ad29feaf8254775caf1389b78e2fd20e3e6", kill_on_drop: false }`
[INFO] [stdout] 74d7c2160317289fc8afffd2338a5ad29feaf8254775caf1389b78e2fd20e3e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ff303c59a76a6589fa4c92a83f3fdb2f7e75ceb8e6eb2d2c78d8fecf8d4cfced
[INFO] running `Command { std: "docker" "start" "-a" "ff303c59a76a6589fa4c92a83f3fdb2f7e75ceb8e6eb2d2c78d8fecf8d4cfced", 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/mutcursor-8694e448b360e4bc)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test mut_cursor_vec::test::basics_vec ... ok
[INFO] [stdout] test test::basics ... ok
[INFO] [stdout] test rooted_vec::test::rooted_vec_basics ... ok
[INFO] [stdout] test test::test_variance ... ok
[INFO] [stdout] test mut_cursor_vec::test::miri_tagging_issue ... ok
[INFO] [stdout] test test::try_to_alias_mut_with_advance ... ok
[INFO] [stdout] test test::try_to_escape_map_closure ... ok
[INFO] [stdout] test test::multi_thread_test ... ok
[INFO] [stderr]    Doc-tests mutcursor
[INFO] [stdout] test rooted_vec::test::rooted_vec_multi_thread_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - (line 78) ... ignored
[INFO] [stdout] test src/unique.rs - unique (line 15) ... ok
[INFO] [stdout] test src/rooted_vec.rs - rooted_vec::MutCursorRootedVec (line 44) ... ok
[INFO] [stdout] test src/lib.rs - (line 27) ... ok
[INFO] [stdout] test src/lib.rs - MutCursor<'root,T,N>::try_map_into_mut (line 138) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.35s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ff303c59a76a6589fa4c92a83f3fdb2f7e75ceb8e6eb2d2c78d8fecf8d4cfced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff303c59a76a6589fa4c92a83f3fdb2f7e75ceb8e6eb2d2c78d8fecf8d4cfced", kill_on_drop: false }`
[INFO] [stdout] ff303c59a76a6589fa4c92a83f3fdb2f7e75ceb8e6eb2d2c78d8fecf8d4cfced