[INFO] crate undulate 0.1.0 is already in cache
[INFO] extracting crate undulate 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/undulate/0.1.0
[INFO] extracting crate undulate 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/undulate/0.1.0
[INFO] validating manifest of undulate-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of undulate-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing undulate-0.1.0
[INFO] finished frobbing undulate-0.1.0
[INFO] frobbed toml for undulate-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/undulate/0.1.0/Cargo.toml
[INFO] started frobbing undulate-0.1.0
[INFO] finished frobbing undulate-0.1.0
[INFO] frobbed toml for undulate-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/undulate/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing undulate-0.1.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/undulate/0.1.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a9ba7b9a0151450abda559990f90d2ea153a9e7203e6b4902a9738e880657b89
[INFO] running `"docker" "start" "-a" "a9ba7b9a0151450abda559990f90d2ea153a9e7203e6b4902a9738e880657b89"`
[INFO] [stderr]    Compiling undulate v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Read`, `self`
[INFO] [stderr]   --> src/lib.rs:12:15
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::{self, Read, Write};
[INFO] [stderr]    |               ^^^^  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `specifier`
[INFO] [stderr]   --> src/lib.rs:96:30
[INFO] [stderr]    |
[INFO] [stderr] 96 | pub fn remove<T: AsRef<str>>(specifier: T) -> Result<(), RemoveError> {
[INFO] [stderr]    |                              ^^^^^^^^^ help: consider prefixing with an underscore: `_specifier`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `url`
[INFO] [stderr]    --> src/lib.rs:100:16
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub fn install(url: &str) -> Result<(), InstallError> {
[INFO] [stderr]     |                ^^^ help: consider prefixing with an underscore: `_url`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.84s
[INFO] running `"docker" "inspect" "a9ba7b9a0151450abda559990f90d2ea153a9e7203e6b4902a9738e880657b89"`
[INFO] running `"docker" "rm" "-f" "a9ba7b9a0151450abda559990f90d2ea153a9e7203e6b4902a9738e880657b89"`
[INFO] [stdout] a9ba7b9a0151450abda559990f90d2ea153a9e7203e6b4902a9738e880657b89
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/undulate/0.1.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] a156ad8c323ce9e7de1b3c69c055c425793c071201b18f833b778e6e44ce319c
[INFO] running `"docker" "start" "-a" "a156ad8c323ce9e7de1b3c69c055c425793c071201b18f833b778e6e44ce319c"`
[INFO] [stderr]    Compiling undulate v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Read`, `self`
[INFO] [stderr]   --> src/lib.rs:12:15
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::io::{self, Read, Write};
[INFO] [stderr]    |               ^^^^  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `specifier`
[INFO] [stderr]   --> src/lib.rs:96:30
[INFO] [stderr]    |
[INFO] [stderr] 96 | pub fn remove<T: AsRef<str>>(specifier: T) -> Result<(), RemoveError> {
[INFO] [stderr]    |                              ^^^^^^^^^ help: consider prefixing with an underscore: `_specifier`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `url`
[INFO] [stderr]    --> src/lib.rs:100:16
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub fn install(url: &str) -> Result<(), InstallError> {
[INFO] [stderr]     |                ^^^ help: consider prefixing with an underscore: `_url`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `"docker" "inspect" "a156ad8c323ce9e7de1b3c69c055c425793c071201b18f833b778e6e44ce319c"`
[INFO] running `"docker" "rm" "-f" "a156ad8c323ce9e7de1b3c69c055c425793c071201b18f833b778e6e44ce319c"`
[INFO] [stdout] a156ad8c323ce9e7de1b3c69c055c425793c071201b18f833b778e6e44ce319c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/undulate/0.1.0:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 8e094af324b734eb71e463cee24fe0a488a2982baff2c9f61c463fce0a4f0638
[INFO] running `"docker" "start" "-a" "8e094af324b734eb71e463cee24fe0a488a2982baff2c9f61c463fce0a4f0638"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/undulate-21d7c11e122212bb
[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] [stderr]      Running /opt/crater/target/debug/deps/und-ec6d1c6f286883be
[INFO] [stderr]    Doc-tests undulate
[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] [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" "8e094af324b734eb71e463cee24fe0a488a2982baff2c9f61c463fce0a4f0638"`
[INFO] running `"docker" "rm" "-f" "8e094af324b734eb71e463cee24fe0a488a2982baff2c9f61c463fce0a4f0638"`
[INFO] [stdout] 8e094af324b734eb71e463cee24fe0a488a2982baff2c9f61c463fce0a4f0638