[INFO] fetching crate guard_let 0.1.2...
[INFO] checking guard_let-0.1.2 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate guard_let 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate guard_let 0.1.2 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate guard_let 0.1.2
[INFO] finished tweaking crates.io crate guard_let 0.1.2
[INFO] tweaked toml for crates.io crate guard_let 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding pmutil v0.5.3 (available: v0.6.1)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.90)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pmutil v0.5.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9345e6990ce1cfb392447bce372620acd3b2fd43fccf464366941cd4e4fea884
[INFO] running `Command { std: "docker" "start" "-a" "9345e6990ce1cfb392447bce372620acd3b2fd43fccf464366941cd4e4fea884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9345e6990ce1cfb392447bce372620acd3b2fd43fccf464366941cd4e4fea884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9345e6990ce1cfb392447bce372620acd3b2fd43fccf464366941cd4e4fea884", kill_on_drop: false }`
[INFO] [stdout] 9345e6990ce1cfb392447bce372620acd3b2fd43fccf464366941cd4e4fea884
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ae8d25392d90a607a065cb8438deea56514b424c9200c29a3c8ade2f545e984
[INFO] running `Command { std: "docker" "start" "-a" "8ae8d25392d90a607a065cb8438deea56514b424c9200c29a3c8ade2f545e984", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.14
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking pmutil v0.5.3
[INFO] [stderr]     Checking guard_let v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `Enum` doesn't implement `Debug`
[INFO] [stdout]   --> tests/usage.rs:21:38
[INFO] [stdout]    |
[INFO] [stdout] 21 |         println!("v is not A: {:?}", v);
[INFO] [stdout]    |                                      ^ `Enum` cannot be formatted using `{:?}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `Enum`
[INFO] [stdout]    = note: add `#[derive(Debug)]` to `Enum` or manually `impl Debug for Enum`
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Enum` doesn't implement `Debug`
[INFO] [stdout]   --> tests/usage.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 |         println!("v is not C: {:?}", v);
[INFO] [stdout]    |                                      ^ `Enum` cannot be formatted using `{:?}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `Enum`
[INFO] [stdout]    = note: add `#[derive(Debug)]` to `Enum` or manually `impl Debug for Enum`
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `guard_let` (test "usage") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8ae8d25392d90a607a065cb8438deea56514b424c9200c29a3c8ade2f545e984", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ae8d25392d90a607a065cb8438deea56514b424c9200c29a3c8ade2f545e984", kill_on_drop: false }`
[INFO] [stdout] 8ae8d25392d90a607a065cb8438deea56514b424c9200c29a3c8ade2f545e984
