[INFO] cloning repository https://github.com/phil-opp/rust-issue-51342-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/phil-opp/rust-issue-51342-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphil-opp%2Frust-issue-51342-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphil-opp%2Frust-issue-51342-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52d06cf45476b3544205f177134a8cb523c0b39a
[INFO] checking phil-opp/rust-issue-51342-example against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphil-opp%2Frust-issue-51342-example" "/workspace/builds/worker-52/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-52/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phil-opp/rust-issue-51342-example on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-52/source/.cargo/config
[INFO] started tweaking git repo https://github.com/phil-opp/rust-issue-51342-example
[INFO] finished tweaking git repo https://github.com/phil-opp/rust-issue-51342-example
[INFO] tweaked toml for git repo https://github.com/phil-opp/rust-issue-51342-example written to /workspace/builds/worker-52/source/Cargo.toml
[INFO] crate git repo https://github.com/phil-opp/rust-issue-51342-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--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-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5870e46de18e1cdb57f239227b6533ce12e80a3bf115a01b0433d7f599d63453
[INFO] running `Command { std: "docker" "start" "-a" "5870e46de18e1cdb57f239227b6533ce12e80a3bf115a01b0433d7f599d63453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5870e46de18e1cdb57f239227b6533ce12e80a3bf115a01b0433d7f599d63453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5870e46de18e1cdb57f239227b6533ce12e80a3bf115a01b0433d7f599d63453", kill_on_drop: false }`
[INFO] [stdout] 5870e46de18e1cdb57f239227b6533ce12e80a3bf115a01b0433d7f599d63453
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 528997ca07d82393b817d453569b11736a9bd78351aa38c1ff90772f0c57620e
[INFO] running `Command { std: "docker" "start" "-a" "528997ca07d82393b817d453569b11736a9bd78351aa38c1ff90772f0c57620e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling testtest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling cortex-m-rt v0.5.2
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(panic_implementation)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: subsumed by `#[panic_handler]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(panic_implementation)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: subsumed by `#[panic_handler]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `panic_implementation` in this scope
[INFO] [stdout]   --> src/main.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[panic_implementation]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `testtest` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: cannot find attribute `panic_implementation` in this scope
[INFO] [stdout]   --> src/main.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[panic_implementation]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "528997ca07d82393b817d453569b11736a9bd78351aa38c1ff90772f0c57620e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "528997ca07d82393b817d453569b11736a9bd78351aa38c1ff90772f0c57620e", kill_on_drop: false }`
[INFO] [stdout] 528997ca07d82393b817d453569b11736a9bd78351aa38c1ff90772f0c57620e