[INFO] fetching crate ifmt-impl 0.3.3...
[INFO] checking ifmt-impl-0.3.3 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate ifmt-impl 0.3.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate ifmt-impl 0.3.3 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ifmt-impl 0.3.3
[INFO] finished tweaking crates.io crate ifmt-impl 0.3.3
[INFO] tweaked toml for crates.io crate ifmt-impl 0.3.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f00e6e67502685cc5b36af4965f3e170c0690523466833e19b6609d4ad826a2e
[INFO] running `Command { std: "docker" "start" "-a" "f00e6e67502685cc5b36af4965f3e170c0690523466833e19b6609d4ad826a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f00e6e67502685cc5b36af4965f3e170c0690523466833e19b6609d4ad826a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f00e6e67502685cc5b36af4965f3e170c0690523466833e19b6609d4ad826a2e", kill_on_drop: false }`
[INFO] [stdout] f00e6e67502685cc5b36af4965f3e170c0690523466833e19b6609d4ad826a2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2d9c1cb5c28f7eb6f292da87a8c3c47ac9f1be5dfc0ed2e8f81111cd4206789
[INFO] running `Command { std: "docker" "start" "-a" "d2d9c1cb5c28f7eb6f292da87a8c3c47ac9f1be5dfc0ed2e8f81111cd4206789", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking syn v1.0.75
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking ifmt-impl v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]   --> src/lib.rs:82:24
[INFO] [stdout]    |
[INFO] [stdout] 82 |     panic!("unbalanced {");
[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] 82 |     panic!("{}", "unbalanced {");
[INFO] [stdout]    |            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]   --> src/lib.rs:82:24
[INFO] [stdout]    |
[INFO] [stdout] 82 |     panic!("unbalanced {");
[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] 82 |     panic!("{}", "unbalanced {");
[INFO] [stdout]    |            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]    --> src/lib.rs:326:43
[INFO] [stdout]     |
[INFO] [stdout] 326 |                         panic!("unmatched }");
[INFO] [stdout]     |                                           ^
[INFO] [stdout]     |
[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] 326 |                         panic!("{}", "unmatched }");
[INFO] [stdout]     |                                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]    --> src/lib.rs:326:43
[INFO] [stdout]     |
[INFO] [stdout] 326 |                         panic!("unmatched }");
[INFO] [stdout]     |                                           ^
[INFO] [stdout]     |
[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] 326 |                         panic!("{}", "unmatched }");
[INFO] [stdout]     |                                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.18s
[INFO] running `Command { std: "docker" "inspect" "d2d9c1cb5c28f7eb6f292da87a8c3c47ac9f1be5dfc0ed2e8f81111cd4206789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2d9c1cb5c28f7eb6f292da87a8c3c47ac9f1be5dfc0ed2e8f81111cd4206789", kill_on_drop: false }`
[INFO] [stdout] d2d9c1cb5c28f7eb6f292da87a8c3c47ac9f1be5dfc0ed2e8f81111cd4206789