[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-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiohub%2Fpiece" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iohub/piece on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", 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-4/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-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded block-padding v0.1.3
[INFO] [stderr]   Downloaded bit-set v0.5.0
[INFO] [stderr]   Downloaded bit-vec v0.5.0
[INFO] [stderr]   Downloaded llvm-sys v60.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd68b3d25232533a7be0f9be6183e34d7f47e0a2efc8839d6277708ffcbaf991
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bd68b3d25232533a7be0f9be6183e34d7f47e0a2efc8839d6277708ffcbaf991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd68b3d25232533a7be0f9be6183e34d7f47e0a2efc8839d6277708ffcbaf991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd68b3d25232533a7be0f9be6183e34d7f47e0a2efc8839d6277708ffcbaf991", kill_on_drop: false }`
[INFO] [stdout] bd68b3d25232533a7be0f9be6183e34d7f47e0a2efc8839d6277708ffcbaf991
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--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] 2bc9dae9ce1362361b1bcb013bd3b5694caf5e9f41389ad86b9e4db3a347fe96
[INFO] running `Command { std: "docker" "start" "-a" "2bc9dae9ce1362361b1bcb013bd3b5694caf5e9f41389ad86b9e4db3a347fe96", 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 siphasher v0.2.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling regex-syntax v0.6.5
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[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 itertools v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[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 bit-set v0.5.0
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling clap v2.33.0
[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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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 1m 47s
[INFO] running `Command { std: "docker" "inspect" "2bc9dae9ce1362361b1bcb013bd3b5694caf5e9f41389ad86b9e4db3a347fe96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bc9dae9ce1362361b1bcb013bd3b5694caf5e9f41389ad86b9e4db3a347fe96", kill_on_drop: false }`
[INFO] [stdout] 2bc9dae9ce1362361b1bcb013bd3b5694caf5e9f41389ad86b9e4db3a347fe96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--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] 3bc5d6348264513302a1516f7a63342945d7e9d712043106ca62eef027fa71e6
[INFO] running `Command { std: "docker" "start" "-a" "3bc5d6348264513302a1516f7a63342945d7e9d712043106ca62eef027fa71e6", 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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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 7.14s
[INFO] running `Command { std: "docker" "inspect" "3bc5d6348264513302a1516f7a63342945d7e9d712043106ca62eef027fa71e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc5d6348264513302a1516f7a63342945d7e9d712043106ca62eef027fa71e6", kill_on_drop: false }`
[INFO] [stdout] 3bc5d6348264513302a1516f7a63342945d7e9d712043106ca62eef027fa71e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", 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] c45fa21ce01fdedb990e4271747e2e32c23ae710ab51b1eb4d3e5187df8cc3ac
[INFO] running `Command { std: "docker" "start" "-a" "c45fa21ce01fdedb990e4271747e2e32c23ae710ab51b1eb4d3e5187df8cc3ac", kill_on_drop: false }`
[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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/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-6adf6aef78847372/out/grammar.rs:17553:5
[INFO] [stderr]       |
[INFO] [stderr] 17553 |     (__0)
[INFO] [stderr]       |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/do_lang-a204ef5400ee4704
[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;\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;\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;\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;\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: Other, message: "Read-only file system" }', src/codegen.rs:120:59
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5610ea268780 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stdout]    1:     0x5610ea268780 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x5610ea268780 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stdout]    3:     0x5610ea268780 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stdout]    4:     0x5610ea28d17c - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/fmt/mod.rs:1080
[INFO] [stdout]    5:     0x5610ea168856 - std::io::Write::write_fmt::h68b2e5fe4c78e61a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/mod.rs:1516
[INFO] [stdout]    6:     0x5610ea262e0d - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::he9ebec865e28165c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/impls.rs:179
[INFO] [stdout]    7:     0x5610ea26ac9d - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stdout]    8:     0x5610ea26ac9d - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stdout]    9:     0x5610ea26ac9d - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:208
[INFO] [stdout]   10:     0x5610ea26a8f2 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:224
[INFO] [stdout]   11:     0x5610ea26b381 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:577
[INFO] [stdout]   12:     0x5610ea26af29 - std::panicking::begin_panic_handler::{{closure}}::h8b43445b254eeb30
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:484
[INFO] [stdout]   13:     0x5610ea268c0c - std::sys_common::backtrace::__rust_end_short_backtrace::hacd691450edfeae0
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stdout]   14:     0x5610ea26aee9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:483
[INFO] [stdout]   15:     0x5610ea28b051 - core::panicking::panic_fmt::h5b17d4a0e853d0f5
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/panicking.rs:85
[INFO] [stdout]   16:     0x5610ea28ae73 - core::option::expect_none_failed::hd08bf36cae411fff
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/option.rs:1234
[INFO] [stdout]   17:     0x5610ea1a710f - core::result::Result<T,E>::expect::haeae2e64932cb97b
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/result.rs:933
[INFO] [stdout]   18:     0x5610ea01366d - do_lang::codegen::LLVMGenerator::run::h58b24a951f07c686
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:120
[INFO] [stdout]   19:     0x5610ea0177b9 - do_lang::codegen::codegen_test::h4818469823dd87b6
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:555
[INFO] [stdout]   20:     0x5610ea01767a - do_lang::codegen::codegen_test::{{closure}}::h5fe1cc4bdd2e292b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/codegen.rs:509
[INFO] [stdout]   21:     0x5610ea018d4e - core::ops::function::FnOnce::call_once::h9dd4b2ae2f2d1820
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   22:     0x5610ea18f643 - core::ops::function::FnOnce::call_once::hcd3fa2f0696c1015
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   23:     0x5610ea18f643 - test::__rust_begin_short_backtrace::h113f97c5e5ab7d4a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:516
[INFO] [stdout]   24:     0x5610ea18db48 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h01fd09163cae2442
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   25:     0x5610ea18db48 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0da6b685ae74a04a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   26:     0x5610ea18db48 - std::panicking::try::do_call::h564a32f132f2c264
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   27:     0x5610ea18db48 - std::panicking::try::h477cfd4b06a2e64a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   28:     0x5610ea18db48 - std::panic::catch_unwind::hdb5abc6d008c399d
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   29:     0x5610ea18db48 - test::run_test_in_process::he8ff7dec91b275be
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:543
[INFO] [stdout]   30:     0x5610ea18db48 - test::run_test::run_test_inner::{{closure}}::hfd9f49e4a4ff9162
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:449
[INFO] [stdout]   31:     0x5610ea167bd6 - std::sys_common::backtrace::__rust_begin_short_backtrace::hee6d60d5bb466aff
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stdout]   32:     0x5610ea16cd45 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h988cecdf9ebbaf00
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:464
[INFO] [stdout]   33:     0x5610ea16cd45 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h330cf727ec126982
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   34:     0x5610ea16cd45 - std::panicking::try::do_call::h6cd25078f4a5ea13
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   35:     0x5610ea16cd45 - std::panicking::try::h84b1d49961301705
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   36:     0x5610ea16cd45 - std::panic::catch_unwind::h6145324593b3654b
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   37:     0x5610ea16cd45 - std::thread::Builder::spawn_unchecked::{{closure}}::ha41e72e8024f9192
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:463
[INFO] [stdout]   38:     0x5610ea16cd45 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hfb5034cf1f1be223
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   39:     0x5610ea27182a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hd4d30e37db281e8f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   40:     0x5610ea27182a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h019185a215ba16e4
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   41:     0x5610ea27182a - std::sys::unix::thread::Thread::new::thread_start::h33c6d7cf25f9291f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys/unix/thread.rs:87
[INFO] [stdout]   42:     0x7f3bf70ed609 - start_thread
[INFO] [stdout]   43:     0x7f3bf6cc7103 - 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
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--bin do-lang'
[INFO] running `Command { std: "docker" "inspect" "c45fa21ce01fdedb990e4271747e2e32c23ae710ab51b1eb4d3e5187df8cc3ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c45fa21ce01fdedb990e4271747e2e32c23ae710ab51b1eb4d3e5187df8cc3ac", kill_on_drop: false }`
[INFO] [stdout] c45fa21ce01fdedb990e4271747e2e32c23ae710ab51b1eb4d3e5187df8cc3ac
