[INFO] crate duckdns 0.1.1 is already in cache
[INFO] extracting crate duckdns 0.1.1 into work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/duckdns/0.1.1
[INFO] extracting crate duckdns 0.1.1 into work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/duckdns/0.1.1
[INFO] validating manifest of duckdns-0.1.1 on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of duckdns-0.1.1 on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing duckdns-0.1.1
[INFO] finished frobbing duckdns-0.1.1
[INFO] frobbed toml for duckdns-0.1.1 written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/duckdns/0.1.1/Cargo.toml
[INFO] started frobbing duckdns-0.1.1
[INFO] finished frobbing duckdns-0.1.1
[INFO] frobbed toml for duckdns-0.1.1 written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/duckdns/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking duckdns-0.1.1 against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/duckdns/0.1.1:/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6da200a46c206abe9b73f93195cb3436276450c382b696ae1fe99298cfe97ffe
[INFO] running `"docker" "start" "-a" "6da200a46c206abe9b73f93195cb3436276450c382b696ae1fe99298cfe97ffe"`
[INFO] [stderr]    Compiling derive-error-chain v0.11.2
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking duckdns v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Checking dotenv v0.11.0
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> examples/update.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | /     duckdns::DuckDns::new(token)
[INFO] [stderr] 7 | |         .domains("duckdns-rs")
[INFO] [stderr] 8 | |         .ipv4("123.45.67.89")
[INFO] [stderr] 9 | |         .update();
[INFO] [stderr]   | |__________________^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.43s
[INFO] running `"docker" "inspect" "6da200a46c206abe9b73f93195cb3436276450c382b696ae1fe99298cfe97ffe"`
[INFO] running `"docker" "rm" "-f" "6da200a46c206abe9b73f93195cb3436276450c382b696ae1fe99298cfe97ffe"`
[INFO] [stdout] 6da200a46c206abe9b73f93195cb3436276450c382b696ae1fe99298cfe97ffe