[INFO] fetching crate limit_read 0.2.0...
[INFO] testing limit_read-0.2.0 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] extracting crate limit_read 0.2.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate limit_read 0.2.0 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate limit_read 0.2.0
[INFO] finished tweaking crates.io crate limit_read 0.2.0
[INFO] tweaked toml for crates.io crate limit_read 0.2.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f86968fef1a961cab555ead857a6ea0cf9d44d9ad51d124703c16b882e1a52d
[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" "7f86968fef1a961cab555ead857a6ea0cf9d44d9ad51d124703c16b882e1a52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f86968fef1a961cab555ead857a6ea0cf9d44d9ad51d124703c16b882e1a52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f86968fef1a961cab555ead857a6ea0cf9d44d9ad51d124703c16b882e1a52d", kill_on_drop: false }`
[INFO] [stdout] 7f86968fef1a961cab555ead857a6ea0cf9d44d9ad51d124703c16b882e1a52d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cc35f057315538b289b9ad2e73055c327d4ddc59a9a3fafb15a196af130854f
[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" "2cc35f057315538b289b9ad2e73055c327d4ddc59a9a3fafb15a196af130854f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling limit_read v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `Command { std: "docker" "inspect" "2cc35f057315538b289b9ad2e73055c327d4ddc59a9a3fafb15a196af130854f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cc35f057315538b289b9ad2e73055c327d4ddc59a9a3fafb15a196af130854f", kill_on_drop: false }`
[INFO] [stdout] 2cc35f057315538b289b9ad2e73055c327d4ddc59a9a3fafb15a196af130854f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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] 4fcf3446ce226777a88cd00757138a45299b047ab39744c83df48d45f8e51d96
[INFO] running `Command { std: "docker" "start" "-a" "4fcf3446ce226777a88cd00757138a45299b047ab39744c83df48d45f8e51d96", kill_on_drop: false }`
[INFO] [stderr]    Compiling limit_read v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stdout]    --> src/lib.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 | /     buf_reader
[INFO] [stdout] 195 | |       .read_until_lim(';' as u8, &mut buf, &short_lim)
[INFO] [stdout] 196 | |       .is_err();
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stdout]    --> src/lib.rs:215:5
[INFO] [stdout]     |
[INFO] [stdout] 215 |     buf_reader.read_line_lim(&mut buf, &short_lim).is_err();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "4fcf3446ce226777a88cd00757138a45299b047ab39744c83df48d45f8e51d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fcf3446ce226777a88cd00757138a45299b047ab39744c83df48d45f8e51d96", kill_on_drop: false }`
[INFO] [stdout] 4fcf3446ce226777a88cd00757138a45299b047ab39744c83df48d45f8e51d96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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] 79e51e4ffc480a37852c5c76fa7485560093dd384aceb890619b898e3edac801
[INFO] running `Command { std: "docker" "start" "-a" "79e51e4ffc480a37852c5c76fa7485560093dd384aceb890619b898e3edac801", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stdout] running 4 tests
[INFO] [stderr]    --> src/lib.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 | /     buf_reader
[INFO] [stderr] 195 | |       .read_until_lim(';' as u8, &mut buf, &short_lim)
[INFO] [stderr] 196 | |       .is_err();
[INFO] [stderr]     | |________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stderr]    --> src/lib.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 |     buf_reader.read_line_lim(&mut buf, &short_lim).is_err();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/limit_read-4aea9b1804af4374)
[INFO] [stdout] test tests::read_line_lim ... ok
[INFO] [stderr]    Doc-tests limit_read
[INFO] [stdout] test tests::read_until_lim ... ok
[INFO] [stdout] test tests::lines_lim ... ok
[INFO] [stdout] test tests::split_lim ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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" "79e51e4ffc480a37852c5c76fa7485560093dd384aceb890619b898e3edac801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79e51e4ffc480a37852c5c76fa7485560093dd384aceb890619b898e3edac801", kill_on_drop: false }`
[INFO] [stdout] 79e51e4ffc480a37852c5c76fa7485560093dd384aceb890619b898e3edac801