[INFO] cloning repository https://github.com/iohub/piece
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iohub/piece" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiohub%2Fpiece", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiohub%2Fpiece'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2435d7c783184f70c410675578b16fbfc6330da2
[INFO] testing iohub/piece against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiohub%2Fpiece" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iohub/piece on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-9/source/Cargo.toml
[INFO] crate git repo https://github.com/iohub/piece already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ena v0.11.0
[INFO] [stderr]   Downloaded docopt v1.0.2
[INFO] [stderr]   Downloaded syn v0.15.27
[INFO] [stderr]   Downloaded lalrpop v0.16.3
[INFO] [stderr]   Downloaded llvm-sys v60.3.0
[INFO] [stderr]   Downloaded lalrpop-util v0.16.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 344de8f464d5905b151e328893861c6de5e802240fe425488966e11a4a2ab0ff
[INFO] running `Command { std: "docker" "start" "-a" "344de8f464d5905b151e328893861c6de5e802240fe425488966e11a4a2ab0ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "344de8f464d5905b151e328893861c6de5e802240fe425488966e11a4a2ab0ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "344de8f464d5905b151e328893861c6de5e802240fe425488966e11a4a2ab0ff", kill_on_drop: false }`
[INFO] [stdout] 344de8f464d5905b151e328893861c6de5e802240fe425488966e11a4a2ab0ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cd8c1fa7d064e0bfbad0fd3f43a5916491c8c926ff7e8d6c5d4a774fe738d4a
[INFO] running `Command { std: "docker" "start" "-a" "7cd8c1fa7d064e0bfbad0fd3f43a5916491c8c926ff7e8d6c5d4a774fe738d4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.3
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling bit-set v0.5.0
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling regex-syntax v0.6.5
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling llvm-sys v60.3.0
[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] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]   --> src/codegen.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::ptr;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]      --> /opt/rustwide/target/debug/build/do-lang-8f2256c9a8d32191/out/grammar.rs:16144:5
[INFO] [stdout]       |
[INFO] [stdout] 16144 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:16155:5
[INFO] [stdout]       |
[INFO] [stdout] 16155 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:16166:5
[INFO] [stdout]       |
[INFO] [stdout] 16166 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17246:5
[INFO] [stdout]       |
[INFO] [stdout] 17246 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17304:5
[INFO] [stdout]       |
[INFO] [stdout] 17304 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17380:5
[INFO] [stdout]       |
[INFO] [stdout] 17380 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17414:5
[INFO] [stdout]       |
[INFO] [stdout] 17414 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17553:5
[INFO] [stdout]       |
[INFO] [stdout] 17553 |     (__0)
[INFO] [stdout]       |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.09s
[INFO] running `Command { std: "docker" "inspect" "7cd8c1fa7d064e0bfbad0fd3f43a5916491c8c926ff7e8d6c5d4a774fe738d4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd8c1fa7d064e0bfbad0fd3f43a5916491c8c926ff7e8d6c5d4a774fe738d4a", kill_on_drop: false }`
[INFO] [stdout] 7cd8c1fa7d064e0bfbad0fd3f43a5916491c8c926ff7e8d6c5d4a774fe738d4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 620329a864134bb100022e8b921f667750296f4cb4cbf0bd4f7e132771f69307
[INFO] running `Command { std: "docker" "start" "-a" "620329a864134bb100022e8b921f667750296f4cb4cbf0bd4f7e132771f69307", kill_on_drop: false }`
[INFO] [stderr]    Compiling do-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]   --> src/codegen.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::ptr;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ast::*`
[INFO] [stdout]    --> src/codegen.rs:510:9
[INFO] [stdout]     |
[INFO] [stdout] 510 |     use crate::ast::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]      --> /opt/rustwide/target/debug/build/do-lang-8f2256c9a8d32191/out/grammar.rs:16144:5
[INFO] [stdout]       |
[INFO] [stdout] 16144 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:16155:5
[INFO] [stdout]       |
[INFO] [stdout] 16155 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:16166:5
[INFO] [stdout]       |
[INFO] [stdout] 16166 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17246:5
[INFO] [stdout]       |
[INFO] [stdout] 17246 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17304:5
[INFO] [stdout]       |
[INFO] [stdout] 17304 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17380:5
[INFO] [stdout]       |
[INFO] [stdout] 17380 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17414:5
[INFO] [stdout]       |
[INFO] [stdout] 17414 |     (__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/do-lang-8f2256c9a8d32191/out/grammar.rs:17553:5
[INFO] [stdout]       |
[INFO] [stdout] 17553 |     (__0)
[INFO] [stdout]       |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.37s
[INFO] running `Command { std: "docker" "inspect" "620329a864134bb100022e8b921f667750296f4cb4cbf0bd4f7e132771f69307", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "620329a864134bb100022e8b921f667750296f4cb4cbf0bd4f7e132771f69307", kill_on_drop: false }`
[INFO] [stdout] 620329a864134bb100022e8b921f667750296f4cb4cbf0bd4f7e132771f69307
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1378718d4e44168a3d372d25cec2864814f2dee22098383fc69a748685c50533
[INFO] running `Command { std: "docker" "start" "-a" "1378718d4e44168a3d372d25cec2864814f2dee22098383fc69a748685c50533", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/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-8f2256c9a8d32191/out/grammar.rs:17553:5
[INFO] [stderr]       |
[INFO] [stderr] 17553 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: `do-lang` (bin "do-lang" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/do_lang-6b4e3ad6a90d4a30)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test codegen::codegen_test ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- codegen::codegen_test stdout ----
[INFO] [stdout] ; ModuleID = '__module'
[INFO] [stdout] source_filename = "__module"
[INFO] [stdout] 
[INFO] [stdout] define i64 @foo1(i64 %0, i64 %1) {
[INFO] [stdout] entry:
[INFO] [stdout]   %a = alloca i64
[INFO] [stdout]   store i64 %0, i64* %a
[INFO] [stdout]   %b = alloca i64
[INFO] [stdout]   store i64 %1, i64* %b
[INFO] [stdout]   %c = alloca i64
[INFO] [stdout]   %2 = load i64, i64* %a
[INFO] [stdout]   %3 = add i64 %2, 1001
[INFO] [stdout]   store i64 %3, i64* %c
[INFO] [stdout]   %d = alloca i64
[INFO] [stdout]   %ok = alloca float
[INFO] [stdout]   store float 0x405EDD2F20000000, float* %ok
[INFO] [stdout]   %4 = load float, float* %ok
[INFO] [stdout]   %5 = fcmp ogt float %4, 0x405907DF40000000
[INFO] [stdout]   br i1 %5, label %"if:then", label %"if:else"
[INFO] [stdout] 
[INFO] [stdout] "if:then":                                        ; preds = %entry
[INFO] [stdout]   %val = alloca float
[INFO] [stdout]   store float 0x405ECF5C20000000, float* %val
[INFO] [stdout]   %6 = load i64, i64* %b
[INFO] [stdout]   %7 = add i64 %6, 1992
[INFO] [stdout]   %8 = load i64, i64* %c
[INFO] [stdout]   %9 = add i64 %7, %8
[INFO] [stdout]   %10 = load i64, i64* %a
[INFO] [stdout]   %11 = add i64 %9, %10
[INFO] [stdout]   store i64 %11, i64* %d
[INFO] [stdout]   %12 = load float, float* %val
[INFO] [stdout]   %13 = fadd float %12, 0x3FEBD70A40000000
[INFO] [stdout]   store float %13, float* %val
[INFO] [stdout]   br label %"if:merge"
[INFO] [stdout] 
[INFO] [stdout] "if:else":                                        ; preds = %entry
[INFO] [stdout]   br label %"if:merge"
[INFO] [stdout] 
[INFO] [stdout] "if:merge":                                       ; preds = %"if:else", %"if:then"
[INFO] [stdout]   %14 = load i64, i64* %c
[INFO] [stdout]   %15 = icmp sgt i64 %14, 100
[INFO] [stdout]   br i1 %15, label %"if:then1", label %"if:else2"
[INFO] [stdout] 
[INFO] [stdout] "if:then1":                                       ; preds = %"if:merge"
[INFO] [stdout]   %bv = alloca i64
[INFO] [stdout]   store i64 1002, i64* %bv
[INFO] [stdout]   %16 = load i64, i64* %bv
[INFO] [stdout]   %17 = load i64, i64* %c
[INFO] [stdout]   %18 = add i64 %16, %17
[INFO] [stdout]   store i64 %18, i64* %c
[INFO] [stdout]   br label %"if:merge3"
[INFO] [stdout] 
[INFO] [stdout] "if:else2":                                       ; preds = %"if:merge"
[INFO] [stdout]   br label %"if:merge3"
[INFO] [stdout] 
[INFO] [stdout] "if:merge3":                                      ; preds = %"if:else2", %"if:then1"
[INFO] [stdout]   %19 = load i64, i64* %a
[INFO] [stdout]   ret i64 %19
[INFO] [stdout] }
[INFO] [stdout] 
[INFO] [stdout] define i1 @"foo2\AE\7F"(i64 %0) {
[INFO] [stdout] entry:
[INFO] [stdout]   %a = alloca i64
[INFO] [stdout]   store i64 %0, i64* %a
[INFO] [stdout]   %1 = load i64, i64* %a
[INFO] [stdout]   %2 = icmp eq i64 %1, 100
[INFO] [stdout]   ret i1 %2
[INFO] [stdout] }
[INFO] [stdout] 
[INFO] [stdout] define i64 @"fact\AE\7F"(i64 %0) {
[INFO] [stdout] entry:
[INFO] [stdout]   %n = alloca i64
[INFO] [stdout]   store i64 %0, i64* %n
[INFO] [stdout]   %1 = load i64, i64* %n
[INFO] [stdout]   %2 = icmp eq i64 %1, 1
[INFO] [stdout]   br i1 %2, label %"if:then", label %"if:else"
[INFO] [stdout] 
[INFO] [stdout] "if:then":                                        ; preds = %entry
[INFO] [stdout]   ret i64 1
[INFO] [stdout] 
[INFO] [stdout] "if:else":                                        ; preds = %entry
[INFO] [stdout]   %3 = load i64, i64* %n
[INFO] [stdout]   %4 = sub i64 %3, 1
[INFO] [stdout]   %5 = call i64 @"fact\AE\7F"(i64 %4)
[INFO] [stdout]   %6 = load i64, i64* %n
[INFO] [stdout]   %7 = mul i64 %5, %6
[INFO] [stdout]   ret i64 %7
[INFO] [stdout] }
[INFO] [stdout] 
[INFO] [stdout] define i64 @"main\AE\7F"() {
[INFO] [stdout] entry:
[INFO] [stdout]   %a = alloca i64
[INFO] [stdout]   store i64 1010, i64* %a
[INFO] [stdout]   %b = alloca i64
[INFO] [stdout]   %0 = load i64, i64* %a
[INFO] [stdout]   %1 = call i64 @foo1(i64 %0, i64 1001)
[INFO] [stdout]   %2 = add i64 %1, 123
[INFO] [stdout]   %3 = load i64, i64* %a
[INFO] [stdout]   %4 = call i64 @foo1(i64 %3, i64 201)
[INFO] [stdout]   %5 = add i64 %2, %4
[INFO] [stdout]   store i64 %5, i64* %a
[INFO] [stdout]   %6 = load i64, i64* %a
[INFO] [stdout]   %7 = call i64 @foo1(i64 123, i64 %6)
[INFO] [stdout]   store i64 %7, i64* %b
[INFO] [stdout]   br label %"while:cond"
[INFO] [stdout] 
[INFO] [stdout] "while:cond":                                     ; preds = %"while:body", %entry
[INFO] [stdout]   %8 = load i64, i64* %b
[INFO] [stdout]   %9 = add i64 %8, 100
[INFO] [stdout]   %10 = load i64, i64* %a
[INFO] [stdout]   %11 = icmp sgt i64 %10, %9
[INFO] [stdout]   br i1 %11, label %"while:body", label %"while:merge"
[INFO] [stdout] 
[INFO] [stdout] "while:body":                                     ; preds = %"while:cond"
[INFO] [stdout]   %12 = load i64, i64* %a
[INFO] [stdout]   %13 = load i64, i64* %b
[INFO] [stdout]   %14 = call i64 @foo1(i64 %12, i64 %13)
[INFO] [stdout]   %15 = load i64, i64* %a
[INFO] [stdout]   %16 = add i64 %15, %14
[INFO] [stdout]   store i64 %16, i64* %b
[INFO] [stdout]   br label %"while:cond"
[INFO] [stdout] 
[INFO] [stdout] "while:merge":                                    ; preds = %"while:cond"
[INFO] [stdout] }
[INFO] [stdout] 
[INFO] [stdout] thread 'codegen::codegen_test' panicked at '[err] write demo: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }', src/codegen.rs:120:59
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55a79eab7c70 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x55a79eab7c70 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55a79eab7c70 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x55a79eab7c70 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x55a79eadc1cc - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x55a79eab4bd5 - std::io::Write::write_fmt::h5f34a676f60246b5
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x55a79eab9deb - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x55a79eab9deb - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x55a79eab9deb - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x55a79eab98fc - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x55a79eaba4b4 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x55a79eab9f97 - std::panicking::begin_panic_handler::{{closure}}::he5778f1729cff84a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x55a79eab814c - std::sys_common::backtrace::__rust_end_short_backtrace::h2d11ca8b453b4b1d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x55a79eab9ef9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x55a79e82bd01 - core::panicking::panic_fmt::hf9de31d4acbce4db
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x55a79e82bdf3 - core::result::unwrap_failed::ha0c84e81219e5878
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/result.rs:1599:5
[INFO] [stdout]   16:     0x55a79e9f74e9 - core::result::Result<T,E>::expect::hdbc0736b374cdf0b
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/result.rs:1241:23
[INFO] [stdout]   17:     0x55a79e85b570 - do_lang::codegen::LLVMGenerator::run::h3cf522f6abab7a89
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:120:9
[INFO] [stdout]   18:     0x55a79e85f586 - do_lang::codegen::codegen_test::h41f2c7eb0eba0ea3
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:555:5
[INFO] [stdout]   19:     0x55a79e85f3fa - do_lang::codegen::codegen_test::{{closure}}::hc9d6f760c7e0ca5d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:509:1
[INFO] [stdout]   20:     0x55a79e8849ce - core::ops::function::FnOnce::call_once::h7970ea8b4cddeda1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x55a79e9ed4a3 - core::ops::function::FnOnce::call_once::hbb52c4519d3137b0
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   22:     0x55a79e9ed4a3 - test::__rust_begin_short_backtrace::h86fe3a2a5a5121af
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:578:5
[INFO] [stdout]   23:     0x55a79e9ebf58 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfd956bc3d57399be
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   24:     0x55a79e9ebf58 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h40dc93e0ddb5938a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:347:9
[INFO] [stdout]   25:     0x55a79e9ebf58 - std::panicking::try::do_call::h90d07750cb47c562
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   26:     0x55a79e9ebf58 - std::panicking::try::h063c84733ad2a629
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   27:     0x55a79e9ebf58 - std::panic::catch_unwind::h0c464836a84e7c08
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   28:     0x55a79e9ebf58 - test::run_test_in_process::h5cb06ef620b157fc
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:601:18
[INFO] [stdout]   29:     0x55a79e9ebf58 - test::run_test::run_test_inner::{{closure}}::h76f677f4b93f9828
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:493:39
[INFO] [stdout]   30:     0x55a79e9ba6ed - test::run_test::run_test_inner::{{closure}}::h366d01fe04f4d67a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:520:37
[INFO] [stdout]   31:     0x55a79e9ba6ed - std::sys_common::backtrace::__rust_begin_short_backtrace::h7dfa0de4eb395af2
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   32:     0x55a79e9beeb8 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf0a74bb58798037f
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/thread/mod.rs:476:17
[INFO] [stdout]   33:     0x55a79e9beeb8 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb024e854818586ac
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:347:9
[INFO] [stdout]   34:     0x55a79e9beeb8 - std::panicking::try::do_call::hb2dd9f1d0d48e41d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   35:     0x55a79e9beeb8 - std::panicking::try::h4717ae7bac8b2bf3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   36:     0x55a79e9beeb8 - std::panic::catch_unwind::h0dc8a061326ce8d8
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   37:     0x55a79e9beeb8 - std::thread::Builder::spawn_unchecked::{{closure}}::haa369e2d6fd00aa1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/thread/mod.rs:475:30
[INFO] [stdout]   38:     0x55a79e9beeb8 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h36dcf3de8b056f17
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   39:     0x55a79eabf0c7 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h65c29e4642be2358
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   40:     0x55a79eabf0c7 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd0f8f7fbbd9fffbf
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   41:     0x55a79eabf0c7 - std::sys::unix::thread::Thread::new::thread_start::h2fd22fee3ca77b65
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys/unix/thread.rs:74:17
[INFO] [stdout]   42:     0x7fae0810e609 - start_thread
[INFO] [stdout]   43:     0x7fae07ce7293 - clone
[INFO] [stdout]   44:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     codegen::codegen_test
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--bin do-lang'
[INFO] running `Command { std: "docker" "inspect" "1378718d4e44168a3d372d25cec2864814f2dee22098383fc69a748685c50533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1378718d4e44168a3d372d25cec2864814f2dee22098383fc69a748685c50533", kill_on_drop: false }`
[INFO] [stdout] 1378718d4e44168a3d372d25cec2864814f2dee22098383fc69a748685c50533
