[INFO] crate custom_default 0.0.2 is already in cache
[INFO] checking custom_default-0.0.2 against try#7cb06892a23b4da510686618c8730f0b2e8bd952 for pr-66963
[INFO] extracting crate custom_default 0.0.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate custom_default 0.0.2 on toolchain 7cb06892a23b4da510686618c8730f0b2e8bd952
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate custom_default 0.0.2
[INFO] finished tweaking crates.io crate custom_default 0.0.2
[INFO] tweaked toml for crates.io crate custom_default 0.0.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ced164060072a8bbdba000290f0ea5dca5c562e2f36b633fd7aff77c86225b44
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "ced164060072a8bbdba000290f0ea5dca5c562e2f36b633fd7aff77c86225b44"`
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]    Compiling custom_default v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib.rs:40:2
[INFO] [stderr]    |
[INFO] [stderr] 40 |        return match *data {
[INFO] [stderr]    |  ______^______-
[INFO] [stderr]    | | _____|
[INFO] [stderr]    | ||
[INFO] [stderr] 41 | ||
[INFO] [stderr] 42 | ||         Data::Struct(ref data) => {
[INFO] [stderr] 43 | ||
[INFO] [stderr] ...  ||
[INFO] [stderr] 95 | ||
[INFO] [stderr] 96 | ||     };
[INFO] [stderr]    | ||     ^
[INFO] [stderr]    | ||_____|
[INFO] [stderr]    | |______unreachable expression
[INFO] [stderr]    |        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib.rs:40:2
[INFO] [stderr]    |
[INFO] [stderr] 40 |        return match *data {
[INFO] [stderr]    |  ______^______-
[INFO] [stderr]    | | _____|
[INFO] [stderr]    | ||
[INFO] [stderr] 41 | ||
[INFO] [stderr] 42 | ||         Data::Struct(ref data) => {
[INFO] [stderr] 43 | ||
[INFO] [stderr] ...  ||
[INFO] [stderr] 95 | ||
[INFO] [stderr] 96 | ||     };
[INFO] [stderr]    | ||     ^
[INFO] [stderr]    | ||_____|
[INFO] [stderr]    | |______unreachable expression
[INFO] [stderr]    |        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib.rs:40:2
[INFO] [stderr]    |
[INFO] [stderr] 40 |        return match *data {
[INFO] [stderr]    |  ______^______-
[INFO] [stderr]    | | _____|
[INFO] [stderr]    | ||
[INFO] [stderr] 41 | ||
[INFO] [stderr] 42 | ||         Data::Struct(ref data) => {
[INFO] [stderr] 43 | ||
[INFO] [stderr] ...  ||
[INFO] [stderr] 95 | ||
[INFO] [stderr] 96 | ||     };
[INFO] [stderr]    | ||     ^
[INFO] [stderr]    | ||_____|
[INFO] [stderr]    | |______unreachable expression
[INFO] [stderr]    |        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.12s
[INFO] running `"docker" "inspect" "ced164060072a8bbdba000290f0ea5dca5c562e2f36b633fd7aff77c86225b44"`
[INFO] running `"docker" "rm" "-f" "ced164060072a8bbdba000290f0ea5dca5c562e2f36b633fd7aff77c86225b44"`
[INFO] [stdout] ced164060072a8bbdba000290f0ea5dca5c562e2f36b633fd7aff77c86225b44