[INFO] fetching crate presto-rs 0.1.0...
[INFO] testing presto-rs-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate presto-rs 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate presto-rs 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate presto-rs 0.1.0
[INFO] finished tweaking crates.io crate presto-rs 0.1.0
[INFO] tweaked toml for crates.io crate presto-rs 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "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-2/source/examples/execute.rs
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded winapi-build v0.1.1
[INFO] [stderr]   Downloaded fuchsia-cprng v0.1.1
[INFO] [stderr]   Downloaded num-iter v0.1.42
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded unicode-xid v0.0.3
[INFO] [stderr]   Downloaded matches v0.1.8
[INFO] [stderr]   Downloaded rand v0.4.6
[INFO] [stderr]   Downloaded serde v0.6.15
[INFO] [stderr]   Downloaded term v0.2.14
[INFO] [stderr]   Downloaded tinyvec v1.1.0
[INFO] [stderr]   Downloaded num-rational v0.1.42
[INFO] [stderr]   Downloaded serde_macros v0.6.14
[INFO] [stderr]   Downloaded unicode-normalization v0.1.16
[INFO] [stderr]   Downloaded num-traits v0.2.14
[INFO] [stderr]   Downloaded autocfg v1.0.1
[INFO] [stderr]   Downloaded libz-sys v1.1.2
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded num-integer v0.1.44
[INFO] [stderr]   Downloaded quasi_codegen v0.7.0
[INFO] [stderr]   Downloaded gdi32-sys v0.2.0
[INFO] [stderr]   Downloaded kernel32-sys v0.2.2
[INFO] [stderr]   Downloaded curl-sys v0.1.35
[INFO] [stderr]   Downloaded serde_json v0.6.1
[INFO] [stderr]   Downloaded syntex_syntax v0.29.3
[INFO] [stderr]   Downloaded serde_codegen v0.6.14
[INFO] [stderr]   Downloaded aster v0.13.1
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded openssl-sys v0.7.17
[INFO] [stderr]   Downloaded tinyvec_macros v0.1.0
[INFO] [stderr]   Downloaded remove_dir_all v0.5.3
[INFO] [stderr]   Downloaded num v0.1.42
[INFO] [stderr]   Downloaded gcc v0.3.55
[INFO] [stderr]   Downloaded unicode-bidi v0.3.4
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded same-file v0.1.3
[INFO] [stderr]   Downloaded rdrand v0.4.0
[INFO] [stderr]   Downloaded lazy_static v0.1.16
[INFO] [stderr]   Downloaded rustc-serialize v0.3.24
[INFO] [stderr]   Downloaded vcpkg v0.2.11
[INFO] [stderr]   Downloaded idna v0.1.5
[INFO] [stderr]   Downloaded num-complex v0.1.43
[INFO] [stderr]   Downloaded log v0.3.9
[INFO] [stderr]   Downloaded bitflags v0.3.3
[INFO] [stderr]   Downloaded percent-encoding v1.0.1
[INFO] [stderr]   Downloaded pnacl-build-helper v1.4.11
[INFO] [stderr]   Downloaded curl v0.2.19
[INFO] [stderr]   Downloaded winapi v0.2.8
[INFO] [stderr]   Downloaded url v1.7.2
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded num-bigint v0.1.44
[INFO] [stderr]   Downloaded winapi v0.3.9
[INFO] [stderr]   Downloaded user32-sys v0.2.0
[INFO] [stderr]   Downloaded walkdir v1.0.7
[INFO] [stderr]   Downloaded quasi v0.7.0
[INFO] [stderr]   Downloaded pkg-config v0.3.19
[INFO] [stderr]   Downloaded syntex v0.29.2
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded quasi_macros v0.7.0
[INFO] [stderr]   Downloaded libressl-pnacl-sys v2.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08b1f02eefeb64eeb7c52a56353c8d8af05264f7a0f68c411a96b2a43b7dd811
[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" "08b1f02eefeb64eeb7c52a56353c8d8af05264f7a0f68c411a96b2a43b7dd811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08b1f02eefeb64eeb7c52a56353c8d8af05264f7a0f68c411a96b2a43b7dd811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08b1f02eefeb64eeb7c52a56353c8d8af05264f7a0f68c411a96b2a43b7dd811", kill_on_drop: false }`
[INFO] [stdout] 08b1f02eefeb64eeb7c52a56353c8d8af05264f7a0f68c411a96b2a43b7dd811
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c95ad58d76b0dcc80aeeb6e4019f91e1ea4070608c0ac4e99b1524b9c4b172f
[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" "2c95ad58d76b0dcc80aeeb6e4019f91e1ea4070608c0ac4e99b1524b9c4b172f", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/execute.rs
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling openssl-sys v0.7.17
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling term v0.2.14
[INFO] [stderr]    Compiling curl-sys v0.1.35
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling syntex_syntax v0.29.3
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling serde v0.6.15
[INFO] [stderr]    Compiling serde_json v0.6.1
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2c95ad58d76b0dcc80aeeb6e4019f91e1ea4070608c0ac4e99b1524b9c4b172f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c95ad58d76b0dcc80aeeb6e4019f91e1ea4070608c0ac4e99b1524b9c4b172f", kill_on_drop: false }`
[INFO] [stdout] 2c95ad58d76b0dcc80aeeb6e4019f91e1ea4070608c0ac4e99b1524b9c4b172f