[INFO] crate undulate 0.1.0 is already in cache
[INFO] extracting crate undulate 0.1.0 into work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/undulate/0.1.0
[INFO] extracting crate undulate 0.1.0 into work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/undulate/0.1.0
[INFO] validating manifest of undulate-0.1.0 on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of undulate-0.1.0 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "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/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/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/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/undulate/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking undulate-0.1.0 against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-1/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/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=forbid" "-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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 425caf1e892017e6e708d769fe8ed7627d657a881f2abfa7c2a62c02d46fcd47
[INFO] running `"docker" "start" "-a" "425caf1e892017e6e708d769fe8ed7627d657a881f2abfa7c2a62c02d46fcd47"`
[INFO] [stderr]    Compiling curl-sys v0.4.21
[INFO] [stderr]    Compiling libgit2-sys v0.6.19
[INFO] [stderr]     Checking git2 v0.6.11
[INFO] [stderr]     Checking 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 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] 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 42.81s
[INFO] running `"docker" "inspect" "425caf1e892017e6e708d769fe8ed7627d657a881f2abfa7c2a62c02d46fcd47"`
[INFO] running `"docker" "rm" "-f" "425caf1e892017e6e708d769fe8ed7627d657a881f2abfa7c2a62c02d46fcd47"`
[INFO] [stdout] 425caf1e892017e6e708d769fe8ed7627d657a881f2abfa7c2a62c02d46fcd47