[INFO] cloning repository https://github.com/dobrakmato/rust-brainfuck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dobrakmato/rust-brainfuck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Frust-brainfuck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Frust-brainfuck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fa3572c26c888987b9519d610f3b59b9d5aefee
[INFO] checking dobrakmato/rust-brainfuck against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdobrakmato%2Frust-brainfuck" "/workspace/builds/worker-20/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-20/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dobrakmato/rust-brainfuck on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dobrakmato/rust-brainfuck
[INFO] finished tweaking git repo https://github.com/dobrakmato/rust-brainfuck
[INFO] tweaked toml for git repo https://github.com/dobrakmato/rust-brainfuck written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate git repo https://github.com/dobrakmato/rust-brainfuck already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09f23b4885f2330db51c4a9fd2d8b9cceb0c51cb913dad7ffd9461801f04e943
[INFO] running `Command { std: "docker" "start" "-a" "09f23b4885f2330db51c4a9fd2d8b9cceb0c51cb913dad7ffd9461801f04e943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f23b4885f2330db51c4a9fd2d8b9cceb0c51cb913dad7ffd9461801f04e943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f23b4885f2330db51c4a9fd2d8b9cceb0c51cb913dad7ffd9461801f04e943", kill_on_drop: false }`
[INFO] [stdout] 09f23b4885f2330db51c4a9fd2d8b9cceb0c51cb913dad7ffd9461801f04e943
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91f0a8730781932fcfe18a75419a4756ff0f2724c2677c731550992773dfb72f
[INFO] running `Command { std: "docker" "start" "-a" "91f0a8730781932fcfe18a75419a4756ff0f2724c2677c731550992773dfb72f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking bfjit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `mul_unsigned`
[INFO] [stdout]    --> src/assembler.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn mul_unsigned(&mut self, reg: X64Register) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mov_to_mem_offset`
[INFO] [stdout]    --> src/assembler.rs:282:12
[INFO] [stdout]     |
[INFO] [stdout] 282 |     pub fn mov_to_mem_offset(&mut self, to_memory: X64Register, from_reg: X64Register, offset: i8) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Noop`
[INFO] [stdout]   --> src/ir.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Noop(Link),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Brainfuck`, which is not FFI-safe
[INFO] [stdout]    --> src/compiler.rs:146:31
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub extern "C" fn execute(self) {
[INFO] [stdout]     |                               ^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/compiler.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | / pub struct Brainfuck {
[INFO] [stdout] 127 | |     pub program: MmapMut,
[INFO] [stdout] 128 | |     pub length: usize,
[INFO] [stdout] 129 | |     memory: [u8; MAX_MEMORY],
[INFO] [stdout] 130 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Brainfuck`, which is not FFI-safe
[INFO] [stdout]    --> src/compiler.rs:146:31
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub extern "C" fn execute(self) {
[INFO] [stdout]     |                               ^^^^ not FFI-safe
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]     = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]     = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]    --> src/compiler.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | / pub struct Brainfuck {
[INFO] [stdout] 127 | |     pub program: MmapMut,
[INFO] [stdout] 128 | |     pub length: usize,
[INFO] [stdout] 129 | |     memory: [u8; MAX_MEMORY],
[INFO] [stdout] 130 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.92s
[INFO] running `Command { std: "docker" "inspect" "91f0a8730781932fcfe18a75419a4756ff0f2724c2677c731550992773dfb72f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91f0a8730781932fcfe18a75419a4756ff0f2724c2677c731550992773dfb72f", kill_on_drop: false }`
[INFO] [stdout] 91f0a8730781932fcfe18a75419a4756ff0f2724c2677c731550992773dfb72f