[INFO] fetching crate cucumber 0.3.1...
[INFO] testing cucumber-0.3.1 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate cucumber 0.3.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cucumber 0.3.1 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cucumber 0.3.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate cucumber 0.3.1
[INFO] tweaked toml for crates.io crate cucumber 0.3.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quasi_macros v0.16.0
[INFO] [stderr]   Downloaded serde_codegen v0.7.15
[INFO] [stderr]   Downloaded aster v0.22.1
[INFO] [stderr]   Downloaded quasi v0.16.0
[INFO] [stderr]   Downloaded quasi_codegen v0.16.0
[INFO] [stderr]   Downloaded syntex v0.39.0
[INFO] [stderr]   Downloaded syntex_errors v0.39.0
[INFO] [stderr]   Downloaded syntex_pos v0.39.0
[INFO] [stderr]   Downloaded serde_codegen_internals v0.4.0
[INFO] [stderr]   Downloaded serde_macros v0.7.15
[INFO] [stderr]   Downloaded syntex_syntax v0.39.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5c6cc8bb82035049ffad31c9cf92b2296de7a18a19bd7cfcf61eb7209e7d11f
[INFO] running `Command { std: "docker" "start" "-a" "b5c6cc8bb82035049ffad31c9cf92b2296de7a18a19bd7cfcf61eb7209e7d11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5c6cc8bb82035049ffad31c9cf92b2296de7a18a19bd7cfcf61eb7209e7d11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5c6cc8bb82035049ffad31c9cf92b2296de7a18a19bd7cfcf61eb7209e7d11f", kill_on_drop: false }`
[INFO] [stdout] b5c6cc8bb82035049ffad31c9cf92b2296de7a18a19bd7cfcf61eb7209e7d11f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39b2a9437f23f7afda1e7b2d2fd5369986b8f149d27bf4e3c675845a9be141e9
[INFO] running `Command { std: "docker" "start" "-a" "39b2a9437f23f7afda1e7b2d2fd5369986b8f149d27bf4e3c675845a9be141e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling syntex_pos v0.39.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling syntex_errors v0.39.0
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling syntex_syntax v0.39.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling serde_json v0.7.4
[INFO] [stdout] error[E0502]: cannot borrow `cx.parse_sess.span_diagnostic` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syntex_syntax-0.39.0/src/ext/expand.rs:659:25
[INFO] [stdout]     |
[INFO] [stdout] 649 |         let mut expander = MacroExpander::new(&mut cx);
[INFO] [stdout]     |                                               ------- mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 659 |         let err_count = cx.parse_sess.span_diagnostic.err_count();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stdout] 660 |         let mut ret = expander.fold_crate(c);
[INFO] [stdout]     |                       -------- mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syntex_syntax`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "39b2a9437f23f7afda1e7b2d2fd5369986b8f149d27bf4e3c675845a9be141e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39b2a9437f23f7afda1e7b2d2fd5369986b8f149d27bf4e3c675845a9be141e9", kill_on_drop: false }`
[INFO] [stdout] 39b2a9437f23f7afda1e7b2d2fd5369986b8f149d27bf4e3c675845a9be141e9