[INFO] updating cached repository edbaskerville/cargo-ubuild
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/edbaskerville/cargo-ubuild
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/edbaskerville/cargo-ubuild" "work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/edbaskerville/cargo-ubuild" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/edbaskerville/cargo-ubuild"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/edbaskerville/cargo-ubuild'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9d9169cf6290fcf523a59603491e7ce0745501fb
[INFO] sha for GitHub repo edbaskerville/cargo-ubuild: 9d9169cf6290fcf523a59603491e7ce0745501fb
[INFO] validating manifest of edbaskerville/cargo-ubuild on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of edbaskerville/cargo-ubuild on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing edbaskerville/cargo-ubuild
[INFO] finished frobbing edbaskerville/cargo-ubuild
[INFO] frobbed toml for edbaskerville/cargo-ubuild written to work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild/Cargo.toml
[INFO] started frobbing edbaskerville/cargo-ubuild
[INFO] finished frobbing edbaskerville/cargo-ubuild
[INFO] frobbed toml for edbaskerville/cargo-ubuild written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/edbaskerville/cargo-ubuild/Cargo.toml
[INFO] crate edbaskerville/cargo-ubuild already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing edbaskerville/cargo-ubuild against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] b15ed1fb63f179cd355f6e6b374448936a4d625edd8c822a22c7df654009652e
[INFO] running `"docker" "start" "-a" "b15ed1fb63f179cd355f6e6b374448936a4d625edd8c822a22c7df654009652e"`
[INFO] [stderr]    Compiling utf8parse v0.1.0
[INFO] [stderr]    Compiling vte v0.3.2
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling cargo-ubuild v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Write`, `self`
[INFO] [stderr]  --> src/main.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, Write, BufRead, BufReader};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:60:21
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 let mut reader = BufReader::new(stderr);
[INFO] [stderr]    |                     ----^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `"docker" "inspect" "b15ed1fb63f179cd355f6e6b374448936a4d625edd8c822a22c7df654009652e"`
[INFO] running `"docker" "rm" "-f" "b15ed1fb63f179cd355f6e6b374448936a4d625edd8c822a22c7df654009652e"`
[INFO] [stdout] b15ed1fb63f179cd355f6e6b374448936a4d625edd8c822a22c7df654009652e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ce89988fcf3c2ef7981375e8c2636f7b9d1b25874a8aee751293273849717420
[INFO] running `"docker" "start" "-a" "ce89988fcf3c2ef7981375e8c2636f7b9d1b25874a8aee751293273849717420"`
[INFO] [stderr]    Compiling cargo-ubuild v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Write`, `self`
[INFO] [stderr]  --> src/main.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{self, Write, BufRead, BufReader};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:60:21
[INFO] [stderr]    |
[INFO] [stderr] 60 |                 let mut reader = BufReader::new(stderr);
[INFO] [stderr]    |                     ----^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "ce89988fcf3c2ef7981375e8c2636f7b9d1b25874a8aee751293273849717420"`
[INFO] running `"docker" "rm" "-f" "ce89988fcf3c2ef7981375e8c2636f7b9d1b25874a8aee751293273849717420"`
[INFO] [stdout] ce89988fcf3c2ef7981375e8c2636f7b9d1b25874a8aee751293273849717420
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/edbaskerville/cargo-ubuild:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 1de64f8d4e06e0274e02d879ac9737f66bae141eff46d5ec51d9b4d9eacc40af
[INFO] running `"docker" "start" "-a" "1de64f8d4e06e0274e02d879ac9737f66bae141eff46d5ec51d9b4d9eacc40af"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_ubuild-0a002ba33a76e71d
[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 `"docker" "inspect" "1de64f8d4e06e0274e02d879ac9737f66bae141eff46d5ec51d9b4d9eacc40af"`
[INFO] running `"docker" "rm" "-f" "1de64f8d4e06e0274e02d879ac9737f66bae141eff46d5ec51d9b4d9eacc40af"`
[INFO] [stdout] 1de64f8d4e06e0274e02d879ac9737f66bae141eff46d5ec51d9b4d9eacc40af