[INFO] cloning repository https://github.com/mdu02/ferric-gb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdu02/ferric-gb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdu02%2Fferric-gb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdu02%2Fferric-gb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1ef738bd3ea7fd7cb254a33c547b150f1a35623
[INFO] testing mdu02/ferric-gb against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdu02%2Fferric-gb" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdu02/ferric-gb
[INFO] finished tweaking git repo https://github.com/mdu02/ferric-gb
[INFO] tweaked toml for git repo https://github.com/mdu02/ferric-gb written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdu02/ferric-gb on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mdu02/ferric-gb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a0ecbc004f53136515effdd82a976977db40cc46267a4dd1ac8a32cca50a9c9
[INFO] running `Command { std: "docker" "start" "-a" "0a0ecbc004f53136515effdd82a976977db40cc46267a4dd1ac8a32cca50a9c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a0ecbc004f53136515effdd82a976977db40cc46267a4dd1ac8a32cca50a9c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a0ecbc004f53136515effdd82a976977db40cc46267a4dd1ac8a32cca50a9c9", kill_on_drop: false }`
[INFO] [stdout] 0a0ecbc004f53136515effdd82a976977db40cc46267a4dd1ac8a32cca50a9c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4b39a20ae36cfbb22198ecc8edb8c7eca4123c7c6f7ee932bdf41064a29b0da
[INFO] running `Command { std: "docker" "start" "-a" "c4b39a20ae36cfbb22198ecc8edb8c7eca4123c7c6f7ee932bdf41064a29b0da", kill_on_drop: false }`
[INFO] [stderr]    Compiling ferric-gb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stdout]    --> src/cpu.rs:314:43
[INFO] [stdout]     |
[INFO] [stdout] 314 |                 self.write_narrow_reg(ry, self.read_narrow_reg(rz));
[INFO] [stdout]     |                 ---- ----------------     ^^^^ second mutable borrow occurs here
[INFO] [stdout]     |                 |    |
[INFO] [stdout]     |                 |    first borrow later used by call
[INFO] [stdout]     |                 first mutable borrow occurs here
[INFO] [stdout]     |
[INFO] [stdout] help: try adding a local storing this argument...
[INFO] [stdout]    --> src/cpu.rs:314:43
[INFO] [stdout]     |
[INFO] [stdout] 314 |                 self.write_narrow_reg(ry, self.read_narrow_reg(rz));
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: ...and then using that local as the argument to this call
[INFO] [stdout]    --> src/cpu.rs:314:17
[INFO] [stdout]     |
[INFO] [stdout] 314 |                 self.write_narrow_reg(ry, self.read_narrow_reg(rz));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ram.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut ram = RAM {
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/register.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut reg: Register = Register { value };
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ferric-gb` (bin "ferric-gb") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c4b39a20ae36cfbb22198ecc8edb8c7eca4123c7c6f7ee932bdf41064a29b0da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4b39a20ae36cfbb22198ecc8edb8c7eca4123c7c6f7ee932bdf41064a29b0da", kill_on_drop: false }`
[INFO] [stdout] c4b39a20ae36cfbb22198ecc8edb8c7eca4123c7c6f7ee932bdf41064a29b0da
