[INFO] fetching crate presto 0.1.0...
[INFO] checking presto-0.1.0 against beta for pr-78714
[INFO] extracting crate presto 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate presto 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate presto 0.1.0
[INFO] finished tweaking crates.io crate presto 0.1.0
[INFO] tweaked toml for crates.io crate presto 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-4/source/examples/execute.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 436f769b14a6aff1aef59cd1a1c0c69454dedf6e9a4b0fe3a41b48d1ffcb61be
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "436f769b14a6aff1aef59cd1a1c0c69454dedf6e9a4b0fe3a41b48d1ffcb61be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "436f769b14a6aff1aef59cd1a1c0c69454dedf6e9a4b0fe3a41b48d1ffcb61be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "436f769b14a6aff1aef59cd1a1c0c69454dedf6e9a4b0fe3a41b48d1ffcb61be", kill_on_drop: false }`
[INFO] [stdout] 436f769b14a6aff1aef59cd1a1c0c69454dedf6e9a4b0fe3a41b48d1ffcb61be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7cc395a962fba6ea804f278048a86d32656de1f5c01d627e3de917d188e52f7c
[INFO] running `Command { std: "docker" "start" "-a" "7cc395a962fba6ea804f278048a86d32656de1f5c01d627e3de917d188e52f7c", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/execute.rs
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking curl-sys v0.1.35
[INFO] [stderr]    Compiling syntex_syntax v0.29.3
[INFO] [stderr]     Checking serde_json v0.6.1
[INFO] [stderr]     Checking curl v0.2.19
[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-0.29.3/src/ext/expand.rs:1325:25
[INFO] [stdout]      |
[INFO] [stdout] 1315 |         let mut expander = MacroExpander::new(&mut cx);
[INFO] [stdout]      |                                               ------- mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 1325 |         let err_count = cx.parse_sess.span_diagnostic.err_count();
[INFO] [stdout]      |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stdout] 1326 |         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" "7cc395a962fba6ea804f278048a86d32656de1f5c01d627e3de917d188e52f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cc395a962fba6ea804f278048a86d32656de1f5c01d627e3de917d188e52f7c", kill_on_drop: false }`
[INFO] [stdout] 7cc395a962fba6ea804f278048a86d32656de1f5c01d627e3de917d188e52f7c