[INFO] fetching crate plex 0.2.5...
[INFO] checking plex-0.2.5 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate plex 0.2.5 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate plex 0.2.5 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate plex 0.2.5
[INFO] finished tweaking crates.io crate plex 0.2.5
[INFO] tweaked toml for crates.io crate plex 0.2.5 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3897fedca3fa4d11803891160dc9bd30789684687826c63a36203399e62bfd5b
[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" "3897fedca3fa4d11803891160dc9bd30789684687826c63a36203399e62bfd5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3897fedca3fa4d11803891160dc9bd30789684687826c63a36203399e62bfd5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3897fedca3fa4d11803891160dc9bd30789684687826c63a36203399e62bfd5b", kill_on_drop: false }`
[INFO] [stdout] 3897fedca3fa4d11803891160dc9bd30789684687826c63a36203399e62bfd5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 074fa2b14056731d4b36b74216a3228f8c41cc03f4d1942838539aec1f178055
[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" "074fa2b14056731d4b36b74216a3228f8c41cc03f4d1942838539aec1f178055", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking vec_map v0.6.0
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]     Checking lalr v0.0.2
[INFO] [stderr]    Compiling bit-set v0.4.0
[INFO] [stderr]     Checking redfa v0.0.2
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking plex v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> examples/demo.rs:173:13
[INFO] [stdout]     |
[INFO] [stdout] 173 |             Ident(var) Equals assign[rhs] => Expr {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> examples/demo.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             Ident(i) => Expr {
[INFO] [stdout]     |             ^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> examples/demo.rs:210:13
[INFO] [stdout]     |
[INFO] [stdout] 210 |             Integer(i) => Expr {
[INFO] [stdout]     |             ^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.95s
[INFO] running `Command { std: "docker" "inspect" "074fa2b14056731d4b36b74216a3228f8c41cc03f4d1942838539aec1f178055", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "074fa2b14056731d4b36b74216a3228f8c41cc03f4d1942838539aec1f178055", kill_on_drop: false }`
[INFO] [stdout] 074fa2b14056731d4b36b74216a3228f8c41cc03f4d1942838539aec1f178055