[INFO] fetching crate tuasmavlink 0.1.3...
[INFO] documenting tuasmavlink-0.1.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate tuasmavlink 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate tuasmavlink 0.1.3 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tuasmavlink 0.1.3
[INFO] finished tweaking crates.io crate tuasmavlink 0.1.3
[INFO] tweaked toml for crates.io crate tuasmavlink 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tls-api v0.4.0
[INFO] [stderr]   Downloaded protoc v1.7.5
[INFO] [stderr]   Downloaded httpbis v0.9.1
[INFO] [stderr]   Downloaded tls-api-stub v0.4.0
[INFO] [stderr]   Downloaded grpc-compiler v0.8.1
[INFO] [stderr]   Downloaded protoc-rust-grpc v0.8.1
[INFO] [stderr]   Downloaded grpc v0.8.1
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", 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] ac44977783d6195af4395d2081080b8b20347490a7b99c58c8a64fd4d50be4fc
[INFO] running `Command { std: "docker" "start" "-a" "ac44977783d6195af4395d2081080b8b20347490a7b99c58c8a64fd4d50be4fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac44977783d6195af4395d2081080b8b20347490a7b99c58c8a64fd4d50be4fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac44977783d6195af4395d2081080b8b20347490a7b99c58c8a64fd4d50be4fc", kill_on_drop: false }`
[INFO] [stdout] ac44977783d6195af4395d2081080b8b20347490a7b99c58c8a64fd4d50be4fc
[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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f30bcfbb4ce54c8e599160eb8ce33309af678f8bb1651b206062cdddd27dcf2d
[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" "f30bcfbb4ce54c8e599160eb8ce33309af678f8bb1651b206062cdddd27dcf2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v1.7.5
[INFO] [stderr]    Compiling crc16 v0.3.4
[INFO] [stderr]    Compiling httpbis v0.9.1
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling protobuf v2.17.0
[INFO] [stderr]    Compiling protoc v1.7.5
[INFO] [stderr]     Checking log-ndc v0.2.0
[INFO] [stderr]     Checking tls-api v0.1.22
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]    Compiling syntex_syntax v0.58.1
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling xml-rs v0.2.2
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stdout] error[E0423]: expected function, tuple struct or tuple variant, found struct `ast::Name`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syntex_syntax-0.58.1/src/symbol.rs:146:27
[INFO] [stdout]     |
[INFO] [stdout] 146 |                       name: ast::Name($index),
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 165 | / declare_keywords! {
[INFO] [stdout] 166 | |     // Invalid identifier
[INFO] [stdout] 167 | |     (0,  Invalid,        "")
[INFO] [stdout] 168 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 231 | |     (56, CrateRoot, "{{root}}")
[INFO] [stdout] 232 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]     Checking tls-api v0.4.0
[INFO] [stderr]    Compiling which v4.0.2
[INFO] [stderr]     Checking tls-api-stub v0.4.0
[INFO] [stderr]    Compiling protoc v2.17.0
[INFO] [stderr]    Compiling protobuf-codegen v2.17.0
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[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" "f30bcfbb4ce54c8e599160eb8ce33309af678f8bb1651b206062cdddd27dcf2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f30bcfbb4ce54c8e599160eb8ce33309af678f8bb1651b206062cdddd27dcf2d", kill_on_drop: false }`
[INFO] [stdout] f30bcfbb4ce54c8e599160eb8ce33309af678f8bb1651b206062cdddd27dcf2d