[INFO] fetching crate conftaal 0.1.1...
[INFO] checking conftaal-0.1.1 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4
[INFO] extracting crate conftaal 0.1.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate conftaal 0.1.1 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate conftaal 0.1.1
[INFO] finished tweaking crates.io crate conftaal 0.1.1
[INFO] tweaked toml for crates.io crate conftaal 0.1.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36bb5055642021f85ab4d90fe4cb31d3626ea6eefdf510f4e5410c733e48a084
[INFO] running `Command { std: "docker" "start" "-a" "36bb5055642021f85ab4d90fe4cb31d3626ea6eefdf510f4e5410c733e48a084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36bb5055642021f85ab4d90fe4cb31d3626ea6eefdf510f4e5410c733e48a084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36bb5055642021f85ab4d90fe4cb31d3626ea6eefdf510f4e5410c733e48a084", kill_on_drop: false }`
[INFO] [stdout] 36bb5055642021f85ab4d90fe4cb31d3626ea6eefdf510f4e5410c733e48a084
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7476d265de48048e78adb88a2b7b1903692da4fdd8a396a49c7c5133947f539d
[INFO] running `Command { std: "docker" "start" "-a" "7476d265de48048e78adb88a2b7b1903692da4fdd8a396a49c7c5133947f539d", kill_on_drop: false }`
[INFO] [stderr]     Checking conftaal v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `*current` as mutable more than once at a time
[INFO] [stdout]    --> src/parse/mod.rs:287:19
[INFO] [stdout]     |
[INFO] [stdout] 269 |   fn find_lhs<'a, 'b>(
[INFO] [stdout]     |                   -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 278 |                   op: e_op,
[INFO] [stdout]     |                       ---- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 283 |                   expr = Rc::get_mut(match e_op {
[INFO] [stdout]     |  ________________________-
[INFO] [stdout] 284 | |                     Op::UnaryOp{rhs, ..} | Op::BinaryOp{rhs, ..} => rhs
[INFO] [stdout] 285 | |                 }).unwrap();
[INFO] [stdout]     | |__________________- argument requires that `current.op` is borrowed for `'b`
[INFO] [stdout] 286 |               }
[INFO] [stdout] 287 |               _ => return Ok(current)
[INFO] [stdout]     |                              ^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `conftaal` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0499]: cannot borrow `*current` as mutable more than once at a time
[INFO] [stdout]    --> src/parse/mod.rs:287:19
[INFO] [stdout]     |
[INFO] [stdout] 269 |   fn find_lhs<'a, 'b>(
[INFO] [stdout]     |                   -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 278 |                   op: e_op,
[INFO] [stdout]     |                       ---- first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 283 |                   expr = Rc::get_mut(match e_op {
[INFO] [stdout]     |  ________________________-
[INFO] [stdout] 284 | |                     Op::UnaryOp{rhs, ..} | Op::BinaryOp{rhs, ..} => rhs
[INFO] [stdout] 285 | |                 }).unwrap();
[INFO] [stdout]     | |__________________- argument requires that `current.op` is borrowed for `'b`
[INFO] [stdout] 286 |               }
[INFO] [stdout] 287 |               _ => return Ok(current)
[INFO] [stdout]     |                              ^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `conftaal` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7476d265de48048e78adb88a2b7b1903692da4fdd8a396a49c7c5133947f539d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7476d265de48048e78adb88a2b7b1903692da4fdd8a396a49c7c5133947f539d", kill_on_drop: false }`
[INFO] [stdout] 7476d265de48048e78adb88a2b7b1903692da4fdd8a396a49c7c5133947f539d