[INFO] cloning repository https://github.com/nelhage/feature-in-mod
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Ffeature-in-mod'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ceb2d2e6646635f5161c3a99739889e4d0092eef
[INFO] checking nelhage/feature-in-mod against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Ffeature-in-mod" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nelhage/feature-in-mod on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-11/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 `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 11cb0c064aaad9041e433ff1a3d771b35064983fed474afac0d389240241cb0c
[INFO] running `"docker" "start" "-a" "11cb0c064aaad9041e433ff1a3d771b35064983fed474afac0d389240241cb0c"`
[INFO] [stderr]     Checking feature-in-mod v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: box pattern syntax is experimental
[INFO] [stderr]  --> src/transform.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         AST::Add(box AST::Add(ll, lr), r) => AST::Add(ll, Box::new(AST::Add(lr, r))),
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #29641 <https://github.com/rust-lang/rust/issues/29641> for more information
[INFO] [stderr]   = help: add `#![feature(box_patterns)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `feature-in-mod`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: box pattern syntax is experimental
[INFO] [stderr]  --> src/transform.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         AST::Add(box AST::Add(ll, lr), r) => AST::Add(ll, Box::new(AST::Add(lr, r))),
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #29641 <https://github.com/rust-lang/rust/issues/29641> for more information
[INFO] [stderr]   = help: add `#![feature(box_patterns)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `feature-in-mod`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "11cb0c064aaad9041e433ff1a3d771b35064983fed474afac0d389240241cb0c"`
[INFO] running `"docker" "rm" "-f" "11cb0c064aaad9041e433ff1a3d771b35064983fed474afac0d389240241cb0c"`
[INFO] [stdout] 11cb0c064aaad9041e433ff1a3d771b35064983fed474afac0d389240241cb0c