[INFO] fetching crate fnconcat 0.2.3...
[INFO] checking fnconcat-0.2.3 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate fnconcat 0.2.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate fnconcat 0.2.3 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fnconcat 0.2.3
[INFO] finished tweaking crates.io crate fnconcat 0.2.3
[INFO] tweaked toml for crates.io crate fnconcat 0.2.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59cd9fa4a7d1bf865bb46408672a3543e5c76c5cd60609a6eff009257c585607
[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" "59cd9fa4a7d1bf865bb46408672a3543e5c76c5cd60609a6eff009257c585607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59cd9fa4a7d1bf865bb46408672a3543e5c76c5cd60609a6eff009257c585607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59cd9fa4a7d1bf865bb46408672a3543e5c76c5cd60609a6eff009257c585607", kill_on_drop: false }`
[INFO] [stdout] 59cd9fa4a7d1bf865bb46408672a3543e5c76c5cd60609a6eff009257c585607
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dcdb985caa1ca8795a89f67fbe6215d699c1c84cbad2d052a04ff87827ac6d3
[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" "2dcdb985caa1ca8795a89f67fbe6215d699c1c84cbad2d052a04ff87827ac6d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnconcat v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `,`, `@`, `]`, or `|`, found `..`
[INFO] [stdout]    --> src/lib.rs:102:23
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                       ^^ expected one of `,`, `@`, `]`, or `|`
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to bind the contents of the rest of the array pattern into `rest`, use `@`
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest @ ..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fnconcat` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: expected one of `,`, `@`, `]`, or `|`, found `..`
[INFO] [stdout]    --> src/lib.rs:102:23
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                       ^^ expected one of `,`, `@`, `]`, or `|`
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to bind the contents of the rest of the array pattern into `rest`, use `@`
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest @ ..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `,`, `@`, `]`, or `|`, found `..`
[INFO] [stdout]    --> src/lib.rs:102:23
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                       ^^ expected one of `,`, `@`, `]`, or `|`
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to bind the contents of the rest of the array pattern into `rest`, use `@`
[INFO] [stdout]     |
[INFO] [stdout] 102 |               ref rest @ ..] if delim.delim == token::DelimToken::Bracket => {
[INFO] [stdout]     |                        +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2dcdb985caa1ca8795a89f67fbe6215d699c1c84cbad2d052a04ff87827ac6d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dcdb985caa1ca8795a89f67fbe6215d699c1c84cbad2d052a04ff87827ac6d3", kill_on_drop: false }`
[INFO] [stdout] 2dcdb985caa1ca8795a89f67fbe6215d699c1c84cbad2d052a04ff87827ac6d3