[INFO] fetching crate wamp 0.1.0...
[INFO] checking wamp-0.1.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate wamp 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate wamp 0.1.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate wamp 0.1.0
[INFO] removed path dependency rmp from crates.io crate wamp 0.1.0
[INFO] removed path dependency rmp-serde from crates.io crate wamp 0.1.0
[INFO] finished tweaking crates.io crate wamp 0.1.0
[INFO] tweaked toml for crates.io crate wamp 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c4a3186852fc94d38977bd11fcd69d0c5043e812506be84d2d0210e80e2b28b
[INFO] running `"docker" "start" "-a" "7c4a3186852fc94d38977bd11fcd69d0c5043e812506be84d2d0210e80e2b28b"`
[INFO] [stderr]    Compiling syntex_pos v0.39.0
[INFO] [stderr]     Checking rmp v0.7.5
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking syncbox v0.2.4
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking eventual v0.1.7
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]    Compiling syntex_errors v0.39.0
[INFO] [stderr]     Checking rmp-serde v0.9.6
[INFO] [stderr]     Checking ws v0.5.3
[INFO] [stderr]    Compiling syntex_syntax v0.39.0
[INFO] [stderr] error[E0502]: cannot borrow `cx.parse_sess.span_diagnostic` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syntex_syntax-0.39.0/src/ext/expand.rs:659:25
[INFO] [stderr]     |
[INFO] [stderr] 649 |         let mut expander = MacroExpander::new(&mut cx);
[INFO] [stderr]     |                                               ------- mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 659 |         let err_count = cx.parse_sess.span_diagnostic.err_count();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stderr] 660 |         let mut ret = expander.fold_crate(c);
[INFO] [stderr]     |                       -------- mutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: could not compile `syntex_syntax`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7c4a3186852fc94d38977bd11fcd69d0c5043e812506be84d2d0210e80e2b28b"`
[INFO] running `"docker" "rm" "-f" "7c4a3186852fc94d38977bd11fcd69d0c5043e812506be84d2d0210e80e2b28b"`
[INFO] [stdout] 7c4a3186852fc94d38977bd11fcd69d0c5043e812506be84d2d0210e80e2b28b