[INFO] cloning repository https://github.com/jakelishman/brainfuck-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakelishman/brainfuck-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakelishman%2Fbrainfuck-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakelishman%2Fbrainfuck-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c91023e66274e2aa20d414c9a19880ff3e44c0d
[INFO] testing jakelishman/brainfuck-rust against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakelishman%2Fbrainfuck-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakelishman/brainfuck-rust on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jakelishman/brainfuck-rust
[INFO] finished tweaking git repo https://github.com/jakelishman/brainfuck-rust
[INFO] tweaked toml for git repo https://github.com/jakelishman/brainfuck-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jakelishman/brainfuck-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", 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] be8a2aae0f4c7d1b2bba5d440182a0b3cf3d590eebe0f8ac2e121f2ba455ffb6
[INFO] running `Command { std: "docker" "start" "-a" "be8a2aae0f4c7d1b2bba5d440182a0b3cf3d590eebe0f8ac2e121f2ba455ffb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be8a2aae0f4c7d1b2bba5d440182a0b3cf3d590eebe0f8ac2e121f2ba455ffb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be8a2aae0f4c7d1b2bba5d440182a0b3cf3d590eebe0f8ac2e121f2ba455ffb6", kill_on_drop: false }`
[INFO] [stdout] be8a2aae0f4c7d1b2bba5d440182a0b3cf3d590eebe0f8ac2e121f2ba455ffb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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] 10e8e9115781e84f031a8577480e546c5f48cf51ef24b58ac6cc3966fe860a88
[INFO] running `Command { std: "docker" "start" "-a" "10e8e9115781e84f031a8577480e546c5f48cf51ef24b58ac6cc3966fe860a88", kill_on_drop: false }`
[INFO] [stderr]    Compiling brainfuck_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:29:18
[INFO] [stdout]    |
[INFO] [stdout] 29 |     in_: &'a mut Read,
[INFO] [stdout]    |                  ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     out: &'a mut Write,
[INFO] [stdout]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |     err: &'a mut Write,
[INFO] [stdout]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StdinLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:268:5
[INFO] [stdout]     |
[INFO] [stdout] 268 |     stdin.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if unused stdin will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StdoutLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     stdout.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused stdout will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StderrLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 270 |     stderr.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused stderr will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.06s
[INFO] running `Command { std: "docker" "inspect" "10e8e9115781e84f031a8577480e546c5f48cf51ef24b58ac6cc3966fe860a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10e8e9115781e84f031a8577480e546c5f48cf51ef24b58ac6cc3966fe860a88", kill_on_drop: false }`
[INFO] [stdout] 10e8e9115781e84f031a8577480e546c5f48cf51ef24b58ac6cc3966fe860a88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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] f401d71f4d4b773dbe1409418b39141453fd2e66af99e2f0b4626ddc338efb92
[INFO] running `Command { std: "docker" "start" "-a" "f401d71f4d4b773dbe1409418b39141453fd2e66af99e2f0b4626ddc338efb92", kill_on_drop: false }`
[INFO] [stderr]    Compiling brainfuck_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:29:18
[INFO] [stdout]    |
[INFO] [stdout] 29 |     in_: &'a mut Read,
[INFO] [stdout]    |                  ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     out: &'a mut Write,
[INFO] [stdout]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/interpreter/main.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |     err: &'a mut Write,
[INFO] [stdout]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StdinLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:268:5
[INFO] [stdout]     |
[INFO] [stdout] 268 |     stdin.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if unused stdin will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StdoutLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     stdout.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused stdout will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `StderrLock` that must be used
[INFO] [stdout]    --> src/interpreter/main.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 270 |     stderr.lock();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused stderr will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "f401d71f4d4b773dbe1409418b39141453fd2e66af99e2f0b4626ddc338efb92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f401d71f4d4b773dbe1409418b39141453fd2e66af99e2f0b4626ddc338efb92", kill_on_drop: false }`
[INFO] [stdout] f401d71f4d4b773dbe1409418b39141453fd2e66af99e2f0b4626ddc338efb92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] dfd4fe92898b4d3126ba297b578ae092b3904167c5d19e7178c0fd8930a0e6dd
[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" "dfd4fe92898b4d3126ba297b578ae092b3904167c5d19e7178c0fd8930a0e6dd", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter/main.rs:29:18
[INFO] [stderr]    |
[INFO] [stderr] 29 |     in_: &'a mut Read,
[INFO] [stderr]    |                  ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter/main.rs:30:18
[INFO] [stderr]    |
[INFO] [stderr] 30 |     out: &'a mut Write,
[INFO] [stderr]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter/main.rs:31:18
[INFO] [stderr]    |
[INFO] [stderr] 31 |     err: &'a mut Write,
[INFO] [stderr]    |                  ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: unused `StdinLock` that must be used
[INFO] [stderr]    --> src/interpreter/main.rs:268:5
[INFO] [stderr]     |
[INFO] [stderr] 268 |     stdin.lock();
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if unused stdin will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: unused `StdoutLock` that must be used
[INFO] [stderr]    --> src/interpreter/main.rs:269:5
[INFO] [stderr]     |
[INFO] [stderr] 269 |     stdout.lock();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if unused stdout will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: unused `StderrLock` that must be used
[INFO] [stderr]    --> src/interpreter/main.rs:270:5
[INFO] [stderr]     |
[INFO] [stderr] 270 |     stderr.lock();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if unused stderr will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: `brainfuck_rust` (bin "bfri" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/bf_rust-c2b0a3db363a5d59)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/bfri-73ded44213a84a54)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests bf_rust
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dfd4fe92898b4d3126ba297b578ae092b3904167c5d19e7178c0fd8930a0e6dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfd4fe92898b4d3126ba297b578ae092b3904167c5d19e7178c0fd8930a0e6dd", kill_on_drop: false }`
[INFO] [stdout] dfd4fe92898b4d3126ba297b578ae092b3904167c5d19e7178c0fd8930a0e6dd