[INFO] crate serde_tuple 0.2.2 is already in cache
[INFO] extracting crate serde_tuple 0.2.2 into work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/serde_tuple/0.2.2
[INFO] extracting crate serde_tuple 0.2.2 into work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/serde_tuple/0.2.2
[INFO] validating manifest of serde_tuple-0.2.2 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 serde_tuple-0.2.2 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 serde_tuple-0.2.2
[INFO] finished frobbing serde_tuple-0.2.2
[INFO] frobbed toml for serde_tuple-0.2.2 written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/reg/serde_tuple/0.2.2/Cargo.toml
[INFO] started frobbing serde_tuple-0.2.2
[INFO] finished frobbing serde_tuple-0.2.2
[INFO] frobbed toml for serde_tuple-0.2.2 written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/serde_tuple/0.2.2/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 serde_tuple-0.2.2 against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-3/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/reg/serde_tuple/0.2.2:/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] b011121d0167656bdf7551cf5d20ec4f115364d527e7ff82374a4541d10deb4f
[INFO] running `"docker" "start" "-a" "b011121d0167656bdf7551cf5d20ec4f115364d527e7ff82374a4541d10deb4f"`
[INFO] [stderr]    Compiling serde_tuple v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: suffixes on a tuple index are invalid
[INFO] [stderr]  --> examples/simple.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[derive(Debug, Serialize_tuple, Deserialize_tuple)]
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^ invalid suffix `usize`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `usize` is *temporarily* accepted on tuple index fields as it was incorrectly accepted on stable for a few releases
[INFO] [stderr]   = help: on proc macros, you'll want to use `syn::Index::from` or `proc_macro::Literal::*_unsuffixed` for code that will desugar to tuple field access
[INFO] [stderr]   = note: for more context, see https://github.com/rust-lang/rust/issues/60210
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Cow`
[INFO] [stderr]  --> examples/simple.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::borrow::Cow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `"docker" "inspect" "b011121d0167656bdf7551cf5d20ec4f115364d527e7ff82374a4541d10deb4f"`
[INFO] running `"docker" "rm" "-f" "b011121d0167656bdf7551cf5d20ec4f115364d527e7ff82374a4541d10deb4f"`
[INFO] [stdout] b011121d0167656bdf7551cf5d20ec4f115364d527e7ff82374a4541d10deb4f