[INFO] updating cached repository https://github.com/iohub/piece
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2435d7c783184f70c410675578b16fbfc6330da2
[INFO] checking iohub/piece against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiohub%2Fpiece" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iohub/piece on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/iohub/piece
[INFO] finished tweaking git repo https://github.com/iohub/piece
[INFO] tweaked toml for git repo https://github.com/iohub/piece written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/iohub/piece already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+13f916f63bc6575d5ff1f989237dfabe88981368" "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] fadc6d0f97cd0cae0ceaa7669105696dc1205cb507603aa18fd28011fd1dd875
[INFO] running `"docker" "start" "-a" "fadc6d0f97cd0cae0ceaa7669105696dc1205cb507603aa18fd28011fd1dd875"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling regex-syntax v0.6.5
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling bit-set v0.5.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling llvm-sys v60.3.0
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling do-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::ptr`
[INFO] [stderr]   --> src/codegen.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::ptr;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::ast::*`
[INFO] [stderr]    --> src/codegen.rs:510:9
[INFO] [stderr]     |
[INFO] [stderr] 510 |     use crate::ast::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16144:5
[INFO] [stderr]       |
[INFO] [stderr] 16144 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr]       |
[INFO] [stderr]       = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16155:5
[INFO] [stderr]       |
[INFO] [stderr] 16155 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16166:5
[INFO] [stderr]       |
[INFO] [stderr] 16166 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17246:5
[INFO] [stderr]       |
[INFO] [stderr] 17246 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17304:5
[INFO] [stderr]       |
[INFO] [stderr] 17304 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17380:5
[INFO] [stderr]       |
[INFO] [stderr] 17380 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17414:5
[INFO] [stderr]       |
[INFO] [stderr] 17414 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17553:5
[INFO] [stderr]       |
[INFO] [stderr] 17553 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ptr`
[INFO] [stderr]   --> src/codegen.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::ptr;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16144:5
[INFO] [stderr]       |
[INFO] [stderr] 16144 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr]       |
[INFO] [stderr]       = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16155:5
[INFO] [stderr]       |
[INFO] [stderr] 16155 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:16166:5
[INFO] [stderr]       |
[INFO] [stderr] 16166 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17246:5
[INFO] [stderr]       |
[INFO] [stderr] 17246 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17304:5
[INFO] [stderr]       |
[INFO] [stderr] 17304 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17380:5
[INFO] [stderr]       |
[INFO] [stderr] 17380 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17414:5
[INFO] [stderr]       |
[INFO] [stderr] 17414 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]      --> /opt/rustwide/target/debug/build/do-lang-6a393aa5e555fd99/out/grammar.rs:17553:5
[INFO] [stderr]       |
[INFO] [stderr] 17553 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 46s
[INFO] running `"docker" "inspect" "fadc6d0f97cd0cae0ceaa7669105696dc1205cb507603aa18fd28011fd1dd875"`
[INFO] running `"docker" "rm" "-f" "fadc6d0f97cd0cae0ceaa7669105696dc1205cb507603aa18fd28011fd1dd875"`
[INFO] [stdout] fadc6d0f97cd0cae0ceaa7669105696dc1205cb507603aa18fd28011fd1dd875