[INFO] fetching crate ffigen 0.0.1...
[INFO] checking ffigen-0.0.1 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate ffigen 0.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ffigen 0.0.1 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ffigen 0.0.1
[INFO] finished tweaking crates.io crate ffigen 0.0.1
[INFO] tweaked toml for crates.io crate ffigen 0.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d87e5bdb27f995703c1b2054d761eadada710d58b90e10158db83f0caf407ca5
[INFO] running `Command { std: "docker" "start" "-a" "d87e5bdb27f995703c1b2054d761eadada710d58b90e10158db83f0caf407ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d87e5bdb27f995703c1b2054d761eadada710d58b90e10158db83f0caf407ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d87e5bdb27f995703c1b2054d761eadada710d58b90e10158db83f0caf407ca5", kill_on_drop: false }`
[INFO] [stdout] d87e5bdb27f995703c1b2054d761eadada710d58b90e10158db83f0caf407ca5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02118e64ecac64d8c06832ae1c64e56f2a34bd47b852c4ed070996f4a9abbf17
[INFO] running `Command { std: "docker" "start" "-a" "02118e64ecac64d8c06832ae1c64e56f2a34bd47b852c4ed070996f4a9abbf17", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking winnow v0.4.6
[INFO] [stderr]     Checking bitflags v0.5.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking unicode-xid v0.0.3
[INFO] [stderr]     Checking serde_spanned v0.6.2
[INFO] [stderr]     Checking toml_datetime v0.6.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking term v0.2.14
[INFO] [stderr]     Checking syntex_syntax v0.36.0
[INFO] [stderr]     Checking toml_edit v0.19.10
[INFO] [stderr]     Checking toml 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/index.crates.io-6f17d22bba15001f/syntex_syntax-0.36.0/src/ext/expand.rs:1172:25
[INFO] [stdout]      |
[INFO] [stdout] 1162 |         let mut expander = MacroExpander::new(&mut cx);
[INFO] [stdout]      |                                               ------- mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 1172 |         let err_count = cx.parse_sess.span_diagnostic.err_count();
[INFO] [stdout]      |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stdout] 1173 |         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` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "02118e64ecac64d8c06832ae1c64e56f2a34bd47b852c4ed070996f4a9abbf17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02118e64ecac64d8c06832ae1c64e56f2a34bd47b852c4ed070996f4a9abbf17", kill_on_drop: false }`
[INFO] [stdout] 02118e64ecac64d8c06832ae1c64e56f2a34bd47b852c4ed070996f4a9abbf17
