[INFO] cloning repository https://github.com/sanderhahn/rust-expr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sanderhahn/rust-expr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanderhahn%2Frust-expr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanderhahn%2Frust-expr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68ff888206d4f7a015f5929174912f4529dc7cbd
[INFO] checking sanderhahn/rust-expr against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanderhahn%2Frust-expr" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sanderhahn/rust-expr on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sanderhahn/rust-expr
[INFO] finished tweaking git repo https://github.com/sanderhahn/rust-expr
[INFO] tweaked toml for git repo https://github.com/sanderhahn/rust-expr written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/sanderhahn/rust-expr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii-canvas v2.0.0
[INFO] [stderr]   Downloaded ena v0.13.0
[INFO] [stderr]   Downloaded lalrpop v0.17.2
[INFO] [stderr]   Downloaded serde v1.0.100
[INFO] [stderr]   Downloaded lalrpop-util v0.17.2
[INFO] [stderr]   Downloaded serde_derive v1.0.100
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 97423ded6f31ab528f774f656800cea8f81b5385faf1cbf79e9ac196e512e2a4
[INFO] running `Command { std: "docker" "start" "-a" "97423ded6f31ab528f774f656800cea8f81b5385faf1cbf79e9ac196e512e2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97423ded6f31ab528f774f656800cea8f81b5385faf1cbf79e9ac196e512e2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97423ded6f31ab528f774f656800cea8f81b5385faf1cbf79e9ac196e512e2a4", kill_on_drop: false }`
[INFO] [stdout] 97423ded6f31ab528f774f656800cea8f81b5385faf1cbf79e9ac196e512e2a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1156c51d05828aede21340e691772f16d6d83a9bc38d1be84ecc42878c51f2f3
[INFO] running `Command { std: "docker" "start" "-a" "1156c51d05828aede21340e691772f16d6d83a9bc38d1be84ecc42878c51f2f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling lalrpop-util v0.17.2
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking ucd-util v0.1.5
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling block-padding v0.1.4
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.2
[INFO] [stderr]    Compiling rust-expr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:860:5
[INFO] [stdout]     |
[INFO] [stdout] 860 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:884:5
[INFO] [stdout]     |
[INFO] [stdout] 884 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:908:5
[INFO] [stdout]     |
[INFO] [stdout] 908 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:860:5
[INFO] [stdout]     |
[INFO] [stdout] 860 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:884:5
[INFO] [stdout]     |
[INFO] [stdout] 884 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/rust-expr-7885e633e9936003/out/grammar.rs:908:5
[INFO] [stdout]     |
[INFO] [stdout] 908 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 42s
[INFO] running `Command { std: "docker" "inspect" "1156c51d05828aede21340e691772f16d6d83a9bc38d1be84ecc42878c51f2f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1156c51d05828aede21340e691772f16d6d83a9bc38d1be84ecc42878c51f2f3", kill_on_drop: false }`
[INFO] [stdout] 1156c51d05828aede21340e691772f16d6d83a9bc38d1be84ecc42878c51f2f3