[INFO] fetching crate demonstrate 0.4.5...
[INFO] checking demonstrate-0.4.5 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate demonstrate 0.4.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate demonstrate 0.4.5 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate demonstrate 0.4.5
[INFO] finished tweaking crates.io crate demonstrate 0.4.5
[INFO] tweaked toml for crates.io crate demonstrate 0.4.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate demonstrate 0.4.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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] acbb5c1c63c8bb470fc14f27af278824621f070ad75130d40050343a0a22afda
[INFO] running `Command { std: "docker" "start" "-a" "acbb5c1c63c8bb470fc14f27af278824621f070ad75130d40050343a0a22afda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acbb5c1c63c8bb470fc14f27af278824621f070ad75130d40050343a0a22afda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acbb5c1c63c8bb470fc14f27af278824621f070ad75130d40050343a0a22afda", kill_on_drop: false }`
[INFO] [stdout] acbb5c1c63c8bb470fc14f27af278824621f070ad75130d40050343a0a22afda
[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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9031938e3206b6d679f262ae3fc7f9fb569f0cfb9bdb9b03f81f3d597fcb8c39
[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" "9031938e3206b6d679f262ae3fc7f9fb569f0cfb9bdb9b03f81f3d597fcb8c39", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking event-listener v2.4.0
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking proc-macro2 v1.0.21
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-mutex v1.3.0
[INFO] [stderr]     Checking async-channel v1.4.2
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking async-std v1.6.3
[INFO] [stderr]    Compiling stfu8 v0.2.4
[INFO] [stderr]    Compiling voca_rs v1.12.0
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling demonstrate v0.4.5 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `demonstrate`
[INFO] [stdout] error[E0601]: `main` function not found in crate `full`
[INFO] [stdout]   --> examples/full.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / use demonstrate::demonstrate;
[INFO] [stdout] 2  | |
[INFO] [stdout] 3  | | fn is_4() -> u8 {
[INFO] [stdout] 4  | |     4
[INFO] [stdout] ...  |
[INFO] [stdout] 40 | |     }
[INFO] [stdout] 41 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `examples/full.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9031938e3206b6d679f262ae3fc7f9fb569f0cfb9bdb9b03f81f3d597fcb8c39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9031938e3206b6d679f262ae3fc7f9fb569f0cfb9bdb9b03f81f3d597fcb8c39", kill_on_drop: false }`
[INFO] [stdout] 9031938e3206b6d679f262ae3fc7f9fb569f0cfb9bdb9b03f81f3d597fcb8c39