[INFO] fetching crate varint 0.9.0...
[INFO] testing varint-0.9.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate varint 0.9.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate varint 0.9.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate varint 0.9.0
[INFO] finished tweaking crates.io crate varint 0.9.0
[INFO] tweaked toml for crates.io crate varint 0.9.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e26b04e2bfaebfd37df95089cb26f95ada1ef001b49b946dcdbd2b10ce1d8718
[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" "e26b04e2bfaebfd37df95089cb26f95ada1ef001b49b946dcdbd2b10ce1d8718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e26b04e2bfaebfd37df95089cb26f95ada1ef001b49b946dcdbd2b10ce1d8718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e26b04e2bfaebfd37df95089cb26f95ada1ef001b49b946dcdbd2b10ce1d8718", kill_on_drop: false }`
[INFO] [stdout] e26b04e2bfaebfd37df95089cb26f95ada1ef001b49b946dcdbd2b10ce1d8718
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0649836947b6158921916125072f721216e1611d6556e57e3be6ee8ac7130920
[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" "0649836947b6158921916125072f721216e1611d6556e57e3be6ee8ac7130920", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit_utils v0.1.1
[INFO] [stderr]    Compiling varint v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `next_byte` is never read
[INFO] [stdout]   --> src/rawio.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut next_byte: u8 = 0;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "0649836947b6158921916125072f721216e1611d6556e57e3be6ee8ac7130920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0649836947b6158921916125072f721216e1611d6556e57e3be6ee8ac7130920", kill_on_drop: false }`
[INFO] [stdout] 0649836947b6158921916125072f721216e1611d6556e57e3be6ee8ac7130920
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d036c0a3830d6002ca3cfc9ceeb8ccdf4ac8f5350373ffae211286afddc1beb4
[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" "d036c0a3830d6002ca3cfc9ceeb8ccdf4ac8f5350373ffae211286afddc1beb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling varint v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `next_byte` is never read
[INFO] [stdout]   --> src/rawio.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut next_byte: u8 = 0;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `next_byte` is never read
[INFO] [stdout]   --> src/rawio.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut next_byte: u8 = 0;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "d036c0a3830d6002ca3cfc9ceeb8ccdf4ac8f5350373ffae211286afddc1beb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d036c0a3830d6002ca3cfc9ceeb8ccdf4ac8f5350373ffae211286afddc1beb4", kill_on_drop: false }`
[INFO] [stdout] d036c0a3830d6002ca3cfc9ceeb8ccdf4ac8f5350373ffae211286afddc1beb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5ada380141f09c71a05a61eece8cbfd4a3ab7ea37ef1de6401336114519917ec
[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" "5ada380141f09c71a05a61eece8cbfd4a3ab7ea37ef1de6401336114519917ec", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: value assigned to `next_byte` is never read
[INFO] [stdout] running 7 tests
[INFO] [stderr]   --> src/rawio.rs:37:13
[INFO] [stdout] test zigzag::tests::test_u8_i8_zigzag ... ok
[INFO] [stderr]    |
[INFO] [stdout] test zigzag::tests::test_u64_i64_zigzag ... ok
[INFO] [stderr] 37 |         let mut next_byte: u8 = 0;
[INFO] [stdout] test zigzag::tests::test_u16_i16_zigzag ... ok
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stdout] test rawio::test::test_read_write_unsigned_varint_32 ... ok
[INFO] [stderr]    |
[INFO] [stdout] test rawio::test::test_read_write_signed_varint_32 ... ok
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `next_byte` is never read
[INFO] [stderr]   --> src/rawio.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let mut next_byte: u8 = 0;
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/varint-5e812e7703e45921
[INFO] [stdout] test zigzag::tests::test_u32_i32_zigzag ... ok
[INFO] [stdout] test rawio::test::test_read_write_lots_of_unsigned_varint_32 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests varint
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5ada380141f09c71a05a61eece8cbfd4a3ab7ea37ef1de6401336114519917ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ada380141f09c71a05a61eece8cbfd4a3ab7ea37ef1de6401336114519917ec", kill_on_drop: false }`
[INFO] [stdout] 5ada380141f09c71a05a61eece8cbfd4a3ab7ea37ef1de6401336114519917ec