[INFO] fetching crate narc 0.1.1...
[INFO] testing narc-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate narc 0.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate narc 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate narc 0.1.1
[INFO] finished tweaking crates.io crate narc 0.1.1
[INFO] tweaked toml for crates.io crate narc 0.1.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 655cb93da4658cbcb4abff48a646b983cb0d60d993f604e5309bf19549f4d237
[INFO] running `Command { std: "docker" "start" "-a" "655cb93da4658cbcb4abff48a646b983cb0d60d993f604e5309bf19549f4d237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "655cb93da4658cbcb4abff48a646b983cb0d60d993f604e5309bf19549f4d237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "655cb93da4658cbcb4abff48a646b983cb0d60d993f604e5309bf19549f4d237", kill_on_drop: false }`
[INFO] [stdout] 655cb93da4658cbcb4abff48a646b983cb0d60d993f604e5309bf19549f4d237
[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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 200dc21dfe38c76c4a8afbefd72139d0a166e12c9f806ed5fe3ee557d4a369f0
[INFO] running `Command { std: "docker" "start" "-a" "200dc21dfe38c76c4a8afbefd72139d0a166e12c9f806ed5fe3ee557d4a369f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling nitro_fs v0.1.1
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling narc v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/extract.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use failure::{bail, ensure, Error};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fat`
[INFO] [stdout]   --> src/extract.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let fat = &self.data[fat_offset..fat_offset + file_count * 8];
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_fat`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_u32`
[INFO] [stdout]   --> src/extract.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn read_u32(&self, offset: usize) -> Result<u32, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.32s
[INFO] running `Command { std: "docker" "inspect" "200dc21dfe38c76c4a8afbefd72139d0a166e12c9f806ed5fe3ee557d4a369f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "200dc21dfe38c76c4a8afbefd72139d0a166e12c9f806ed5fe3ee557d4a369f0", kill_on_drop: false }`
[INFO] [stdout] 200dc21dfe38c76c4a8afbefd72139d0a166e12c9f806ed5fe3ee557d4a369f0
[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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f5fc5363d1d0fd090dbe64e4aabddb937c6904d1d0b5ee1fc53eca456965fd4
[INFO] running `Command { std: "docker" "start" "-a" "6f5fc5363d1d0fd090dbe64e4aabddb937c6904d1d0b5ee1fc53eca456965fd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling narc v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/extract.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use failure::{bail, ensure, Error};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fat`
[INFO] [stdout]   --> src/extract.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let fat = &self.data[fat_offset..fat_offset + file_count * 8];
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_fat`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_u32`
[INFO] [stdout]   --> src/extract.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn read_u32(&self, offset: usize) -> Result<u32, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/extract.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use failure::{bail, ensure, Error};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fat`
[INFO] [stdout]   --> src/extract.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let fat = &self.data[fat_offset..fat_offset + file_count * 8];
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_fat`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_u32`
[INFO] [stdout]   --> src/extract.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn read_u32(&self, offset: usize) -> Result<u32, Error> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `Command { std: "docker" "inspect" "6f5fc5363d1d0fd090dbe64e4aabddb937c6904d1d0b5ee1fc53eca456965fd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f5fc5363d1d0fd090dbe64e4aabddb937c6904d1d0b5ee1fc53eca456965fd4", kill_on_drop: false }`
[INFO] [stdout] 6f5fc5363d1d0fd090dbe64e4aabddb937c6904d1d0b5ee1fc53eca456965fd4
[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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7a8e3e7b2232e7d0498780e36a4457bedfa47d48fd9a1c824f8e0ed81c375abd
[INFO] running `Command { std: "docker" "start" "-a" "7a8e3e7b2232e7d0498780e36a4457bedfa47d48fd9a1c824f8e0ed81c375abd", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `bail`
[INFO] [stderr]  --> src/extract.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use failure::{bail, ensure, Error};
[INFO] [stderr]   |               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fat`
[INFO] [stderr]   --> src/extract.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let fat = &self.data[fat_offset..fat_offset + file_count * 8];
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_fat`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `read_u32`
[INFO] [stderr]   --> src/extract.rs:81:8
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn read_u32(&self, offset: usize) -> Result<u32, Error> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `narc` (lib) generated 3 warnings
[INFO] [stderr] warning: `narc` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/narc-35ecaefeb1330a36)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests narc
[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] [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" "7a8e3e7b2232e7d0498780e36a4457bedfa47d48fd9a1c824f8e0ed81c375abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a8e3e7b2232e7d0498780e36a4457bedfa47d48fd9a1c824f8e0ed81c375abd", kill_on_drop: false }`
[INFO] [stdout] 7a8e3e7b2232e7d0498780e36a4457bedfa47d48fd9a1c824f8e0ed81c375abd