[INFO] cloning repository https://github.com/Snektron/mamba [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Snektron/mamba" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnektron%2Fmamba", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnektron%2Fmamba'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 8e16034b3ed9bcf9a5a92b15d9ce65d3bcf8360e [INFO] building Snektron/mamba against try#2cd6942e35a7765b6869d3a149ca54f2598b77ad for pr-93180 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnektron%2Fmamba" "/workspace/builds/worker-14/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Snektron/mamba on toolchain 2cd6942e35a7765b6869d3a149ca54f2598b77ad [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Snektron/mamba [INFO] finished tweaking git repo https://github.com/Snektron/mamba [INFO] tweaked toml for git repo https://github.com/Snektron/mamba written to /workspace/builds/worker-14/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] dc6fd8f616da7075761e78d1b5df76be69f8b666850b6dc0dda3d28caf5e9cc8 [INFO] running `Command { std: "docker" "start" "-a" "dc6fd8f616da7075761e78d1b5df76be69f8b666850b6dc0dda3d28caf5e9cc8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dc6fd8f616da7075761e78d1b5df76be69f8b666850b6dc0dda3d28caf5e9cc8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dc6fd8f616da7075761e78d1b5df76be69f8b666850b6dc0dda3d28caf5e9cc8", kill_on_drop: false }` [INFO] [stdout] dc6fd8f616da7075761e78d1b5df76be69f8b666850b6dc0dda3d28caf5e9cc8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2ff7f2a403fce45f733dc21255cf447923da3edf3552e8c64fb05b533831eed1 [INFO] running `Command { std: "docker" "start" "-a" "2ff7f2a403fce45f733dc21255cf447923da3edf3552e8c64fb05b533831eed1", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.116 [INFO] [stderr] Compiling proc-macro2 v1.0.36 [INFO] [stderr] Compiling syn v1.0.86 [INFO] [stderr] Compiling typenum v1.15.0 [INFO] [stderr] Compiling serde_derive v1.0.136 [INFO] [stderr] Compiling serde v1.0.136 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling byte-tools v0.3.1 [INFO] [stderr] Compiling byteorder v1.4.3 [INFO] [stderr] Compiling fixedbitset v0.1.9 [INFO] [stderr] Compiling either v1.6.1 [INFO] [stderr] Compiling ordermap v0.3.5 [INFO] [stderr] Compiling opaque-debug v0.2.3 [INFO] [stderr] Compiling fake-simd v0.1.2 [INFO] [stderr] Compiling strsim v0.10.0 [INFO] [stderr] Compiling term v0.4.6 [INFO] [stderr] Compiling bit-vec v0.6.3 [INFO] [stderr] Compiling diff v0.1.12 [INFO] [stderr] Compiling lalrpop-util v0.16.3 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling vec_map v0.8.2 [INFO] [stderr] Compiling strsim v0.8.0 [INFO] [stderr] Compiling ansi_term v0.12.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling phf_shared v0.7.24 [INFO] [stderr] Compiling block-padding v0.1.5 [INFO] [stderr] Compiling itertools v0.8.2 [INFO] [stderr] Compiling bit-set v0.5.2 [INFO] [stderr] Compiling ascii-canvas v1.0.0 [INFO] [stderr] Compiling petgraph v0.4.13 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling ena v0.11.0 [INFO] [stderr] Compiling quote v1.0.15 [INFO] [stderr] Compiling clap v2.34.0 [INFO] [stderr] Compiling generic-array v0.12.4 [INFO] [stderr] Compiling block-buffer v0.7.3 [INFO] [stderr] Compiling digest v0.8.1 [INFO] [stderr] Compiling sha2 v0.8.2 [INFO] [stderr] Compiling phf_generator v0.7.24 [INFO] [stderr] Compiling string_cache_codegen v0.4.4 [INFO] [stderr] Compiling string_cache v0.7.5 [INFO] [stderr] Compiling docopt v1.1.1 [INFO] [stderr] Compiling lalrpop v0.16.3 [INFO] [stderr] Compiling mamba v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1861:5 [INFO] [stdout] | [INFO] [stdout] 1861 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1861 - (__0) [INFO] [stdout] 1861 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1934:5 [INFO] [stdout] | [INFO] [stdout] 1934 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1934 - (__0) [INFO] [stdout] 1934 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1947:5 [INFO] [stdout] | [INFO] [stdout] 1947 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1947 - (__0) [INFO] [stdout] 1947 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1995:5 [INFO] [stdout] | [INFO] [stdout] 1995 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1995 - (__0) [INFO] [stdout] 1995 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:2009:5 [INFO] [stdout] | [INFO] [stdout] 2009 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2009 - (__0) [INFO] [stdout] 2009 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:2216:5 [INFO] [stdout] | [INFO] [stdout] 2216 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2216 - (__0) [INFO] [stdout] 2216 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ast/construct.rs:188:13 [INFO] [stdout] | [INFO] [stdout] 188 | let mut t = check_arms(&from, arms, &states, &alphabet)?; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 20s [INFO] running `Command { std: "docker" "inspect" "2ff7f2a403fce45f733dc21255cf447923da3edf3552e8c64fb05b533831eed1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2ff7f2a403fce45f733dc21255cf447923da3edf3552e8c64fb05b533831eed1", kill_on_drop: false }` [INFO] [stdout] 2ff7f2a403fce45f733dc21255cf447923da3edf3552e8c64fb05b533831eed1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+2cd6942e35a7765b6869d3a149ca54f2598b77ad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6d6f848e95da4fe2557e8f316bfa40abb505a36d6665c25320be019bfc0ee39c [INFO] running `Command { std: "docker" "start" "-a" "6d6f848e95da4fe2557e8f316bfa40abb505a36d6665c25320be019bfc0ee39c", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling mamba v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1861:5 [INFO] [stdout] | [INFO] [stdout] 1861 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1861 - (__0) [INFO] [stdout] 1861 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1934:5 [INFO] [stdout] | [INFO] [stdout] 1934 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1934 - (__0) [INFO] [stdout] 1934 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1947:5 [INFO] [stdout] | [INFO] [stdout] 1947 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1947 - (__0) [INFO] [stdout] 1947 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:1995:5 [INFO] [stdout] | [INFO] [stdout] 1995 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 1995 - (__0) [INFO] [stdout] 1995 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:2009:5 [INFO] [stdout] | [INFO] [stdout] 2009 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2009 - (__0) [INFO] [stdout] 2009 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> /opt/rustwide/target/debug/build/mamba-0a07a0352f8cf3bd/out/parser/grammar.rs:2216:5 [INFO] [stdout] | [INFO] [stdout] 2216 | (__0) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 2216 - (__0) [INFO] [stdout] 2216 + __0 [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ast/construct.rs:188:13 [INFO] [stdout] | [INFO] [stdout] 188 | let mut t = check_arms(&from, arms, &states, &alphabet)?; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.78s [INFO] running `Command { std: "docker" "inspect" "6d6f848e95da4fe2557e8f316bfa40abb505a36d6665c25320be019bfc0ee39c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6d6f848e95da4fe2557e8f316bfa40abb505a36d6665c25320be019bfc0ee39c", kill_on_drop: false }` [INFO] [stdout] 6d6f848e95da4fe2557e8f316bfa40abb505a36d6665c25320be019bfc0ee39c