[INFO] fetching crate interpol 0.2.1...
[INFO] checking interpol-0.2.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate interpol 0.2.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate interpol 0.2.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate interpol 0.2.1
[INFO] finished tweaking crates.io crate interpol 0.2.1
[INFO] tweaked toml for crates.io crate interpol 0.2.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15132f0c92a3d0c5960dbab6bfd3fa8786a9945c4b6ee540421f8f1bc7595ce5
[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" "15132f0c92a3d0c5960dbab6bfd3fa8786a9945c4b6ee540421f8f1bc7595ce5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15132f0c92a3d0c5960dbab6bfd3fa8786a9945c4b6ee540421f8f1bc7595ce5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15132f0c92a3d0c5960dbab6bfd3fa8786a9945c4b6ee540421f8f1bc7595ce5", kill_on_drop: false }`
[INFO] [stdout] 15132f0c92a3d0c5960dbab6bfd3fa8786a9945c4b6ee540421f8f1bc7595ce5
[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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9396e2001334dccd8f93283abd470ee7a8d3d6df029f531c4e1fe1839f6850c5
[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" "9396e2001334dccd8f93283abd470ee7a8d3d6df029f531c4e1fe1839f6850c5", kill_on_drop: false }`
[INFO] [stderr]     Checking interpol v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]    --> src/lib.rs:104:49
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("incorrect occurence of `}`");
[INFO] [stdout]     |                                                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("{}", "incorrect occurence of `}`");
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]    --> src/lib.rs:104:49
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("incorrect occurence of `}`");
[INFO] [stdout]     |                                                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("{}", "incorrect occurence of `}`");
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]    --> src/lib.rs:104:49
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("incorrect occurence of `}`");
[INFO] [stdout]     |                                                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 panic!("{}", "incorrect occurence of `}`");
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.18s
[INFO] running `Command { std: "docker" "inspect" "9396e2001334dccd8f93283abd470ee7a8d3d6df029f531c4e1fe1839f6850c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9396e2001334dccd8f93283abd470ee7a8d3d6df029f531c4e1fe1839f6850c5", kill_on_drop: false }`
[INFO] [stdout] 9396e2001334dccd8f93283abd470ee7a8d3d6df029f531c4e1fe1839f6850c5