[INFO] fetching crate ui_test 0.21.1...
[INFO] checking ui_test-0.21.1 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] extracting crate ui_test 0.21.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate ui_test 0.21.1 on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ui_test 0.21.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ui_test 0.21.1
[INFO] tweaked toml for crates.io crate ui_test 0.21.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] deb439111b89d42ee73b224940605b726a783f4bed757bed8bd783d719645ac0
[INFO] running `Command { std: "docker" "start" "-a" "deb439111b89d42ee73b224940605b726a783f4bed757bed8bd783d719645ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "deb439111b89d42ee73b224940605b726a783f4bed757bed8bd783d719645ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "deb439111b89d42ee73b224940605b726a783f4bed757bed8bd783d719645ac0", kill_on_drop: false }`
[INFO] [stdout] deb439111b89d42ee73b224940605b726a783f4bed757bed8bd783d719645ac0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0baf968b770a86fc3481fd55857fbfa0d76055355c467ed358e3d097b7d6db1
[INFO] running `Command { std: "docker" "start" "-a" "d0baf968b770a86fc3481fd55857fbfa0d76055355c467ed358e3d097b7d6db1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.188
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[INFO] [stderr]     Checking rustfix v0.6.1
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[INFO] [stderr]     Checking ui_test v0.21.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `config.out_dir` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:561:5
[INFO] [stdout]     |
[INFO] [stdout] 559 |     let relative = strip_path_prefix(aux_file.parent().unwrap(), &config.out_dir);
[INFO] [stdout]     |                                                                  --------------- immutable borrow occurs here
[INFO] [stdout] 560 |
[INFO] [stdout] 561 |     config.out_dir.extend(relative);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^------^^^^^^^^^^
[INFO] [stdout]     |     |              |
[INFO] [stdout]     |     |              immutable borrow later used by call
[INFO] [stdout]     |     mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `config.out_dir` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:636:9
[INFO] [stdout]     |
[INFO] [stdout] 634 |         let relative = strip_path_prefix(path.parent().unwrap(), &config.out_dir);
[INFO] [stdout]     |                                                                  --------------- immutable borrow occurs here
[INFO] [stdout] 635 |
[INFO] [stdout] 636 |         config.out_dir.extend(relative);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------^^^^^^^^^^
[INFO] [stdout]     |         |              |
[INFO] [stdout]     |         |              immutable borrow later used by call
[INFO] [stdout]     |         mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ui_test` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0502]: cannot borrow `config.out_dir` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:561:5
[INFO] [stdout]     |
[INFO] [stdout] 559 |     let relative = strip_path_prefix(aux_file.parent().unwrap(), &config.out_dir);
[INFO] [stdout]     |                                                                  --------------- immutable borrow occurs here
[INFO] [stdout] 560 |
[INFO] [stdout] 561 |     config.out_dir.extend(relative);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^------^^^^^^^^^^
[INFO] [stdout]     |     |              |
[INFO] [stdout]     |     |              immutable borrow later used by call
[INFO] [stdout]     |     mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `config.out_dir` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:636:9
[INFO] [stdout]     |
[INFO] [stdout] 634 |         let relative = strip_path_prefix(path.parent().unwrap(), &config.out_dir);
[INFO] [stdout]     |                                                                  --------------- immutable borrow occurs here
[INFO] [stdout] 635 |
[INFO] [stdout] 636 |         config.out_dir.extend(relative);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------^^^^^^^^^^
[INFO] [stdout]     |         |              |
[INFO] [stdout]     |         |              immutable borrow later used by call
[INFO] [stdout]     |         mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ui_test` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "d0baf968b770a86fc3481fd55857fbfa0d76055355c467ed358e3d097b7d6db1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0baf968b770a86fc3481fd55857fbfa0d76055355c467ed358e3d097b7d6db1", kill_on_drop: false }`
[INFO] [stdout] d0baf968b770a86fc3481fd55857fbfa0d76055355c467ed358e3d097b7d6db1