[INFO] cloning repository https://github.com/nelhage/feature-in-mod
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nelhage/feature-in-mod" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Ffeature-in-mod", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Ffeature-in-mod'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ceb2d2e6646635f5161c3a99739889e4d0092eef
[INFO] testing nelhage/feature-in-mod against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Ffeature-in-mod" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nelhage/feature-in-mod on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nelhage/feature-in-mod
[INFO] finished tweaking git repo https://github.com/nelhage/feature-in-mod
[INFO] tweaked toml for git repo https://github.com/nelhage/feature-in-mod written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/nelhage/feature-in-mod already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa9fbc2a935285f0167a2714cec73193fe0a2df5ab145d0aa4d3311a4ad1c154
[INFO] running `Command { std: "docker" "start" "-a" "aa9fbc2a935285f0167a2714cec73193fe0a2df5ab145d0aa4d3311a4ad1c154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa9fbc2a935285f0167a2714cec73193fe0a2df5ab145d0aa4d3311a4ad1c154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa9fbc2a935285f0167a2714cec73193fe0a2df5ab145d0aa4d3311a4ad1c154", kill_on_drop: false }`
[INFO] [stdout] aa9fbc2a935285f0167a2714cec73193fe0a2df5ab145d0aa4d3311a4ad1c154
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 083a7aea77c751fbe4feec451d4cc62858ec0b526d940d7afb2ea12c9840601a
[INFO] running `Command { std: "docker" "start" "-a" "083a7aea77c751fbe4feec451d4cc62858ec0b526d940d7afb2ea12c9840601a", kill_on_drop: false }`
[INFO] [stderr]    Compiling feature-in-mod v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: box pattern syntax is experimental
[INFO] [stdout]  --> src/transform.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |         AST::Add(box AST::Add(ll, lr), r) => AST::Add(ll, Box::new(AST::Add(lr, r))),
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #29641 <https://github.com/rust-lang/rust/issues/29641> for more information
[INFO] [stdout]   = help: add `#![feature(box_patterns)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `feature-in-mod` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "083a7aea77c751fbe4feec451d4cc62858ec0b526d940d7afb2ea12c9840601a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "083a7aea77c751fbe4feec451d4cc62858ec0b526d940d7afb2ea12c9840601a", kill_on_drop: false }`
[INFO] [stdout] 083a7aea77c751fbe4feec451d4cc62858ec0b526d940d7afb2ea12c9840601a