[INFO] fetching crate app-error 0.1.1...
[INFO] checking app-error-0.1.1 against 1.95.0 for pr-155915
[INFO] extracting crate app-error 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate app-error 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate app-error 0.1.1
[INFO] tweaked toml for crates.io crate app-error 0.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate app-error 0.1.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate app-error 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 31a98ccf56db6fbd2d557e3bb309d8fa8a62a2766d687b5c325137f90e0fdfbf
[INFO] running `Command { std: "docker" "start" "-a" "31a98ccf56db6fbd2d557e3bb309d8fa8a62a2766d687b5c325137f90e0fdfbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31a98ccf56db6fbd2d557e3bb309d8fa8a62a2766d687b5c325137f90e0fdfbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31a98ccf56db6fbd2d557e3bb309d8fa8a62a2766d687b5c325137f90e0fdfbf", kill_on_drop: false }`
[INFO] [stdout] 31a98ccf56db6fbd2d557e3bb309d8fa8a62a2766d687b5c325137f90e0fdfbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c43b53a2bfdf75f4a128032c5be79ca1be18297c60b0ef3ff4a9d5432c9e122
[INFO] running `Command { std: "docker" "start" "-a" "8c43b53a2bfdf75f4a128032c5be79ca1be18297c60b0ef3ff4a9d5432c9e122", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]     Checking app-error v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:721:3
[INFO] [stdout]     |
[INFO] [stdout] 721 |         assert_matches!(err.as_std_error().source(), None);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:722:3
[INFO] [stdout]     |
[INFO] [stdout] 722 |         assert_matches!(err.into_std_error().source(), None);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:725:3
[INFO] [stdout]     |
[INFO] [stdout] 725 |         assert_matches!(err.as_std_error().source(), Some(err) if err.to_string() == "A");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:726:3
[INFO] [stdout]     |
[INFO] [stdout] 726 |         assert_matches!(err.into_std_error().source(), Some(err) if err.to_string() == "A");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:729:3
[INFO] [stdout]     |
[INFO] [stdout] 729 |         assert_matches!(err.as_std_error().source(), Some(err) if err.to_string() == "A");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:730:3
[INFO] [stdout]     |
[INFO] [stdout] 730 |         assert_matches!(err.into_std_error().source(), Some(err) if err.to_string() == "A");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / #![feature(
[INFO] [stdout] 19 | |     decl_macro,
[INFO] [stdout] 20 | |     try_trait_v2,
[INFO] [stdout] 21 | |     try_trait_v2_residual,
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | |     try_blocks
[INFO] [stdout] 25 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / #![feature(
[INFO] [stdout] 19 | |     decl_macro,
[INFO] [stdout] 20 | |     try_trait_v2,
[INFO] [stdout] 21 | |     try_trait_v2_residual,
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | |     try_blocks
[INFO] [stdout] 25 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `assert_matches`
[INFO] [stdout]    --> src/lib.rs:698:9
[INFO] [stdout]     |
[INFO] [stdout] 698 |         std::{assert_matches, collections::HashSet},
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #82775 <https://github.com/rust-lang/rust/issues/82775> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `app-error` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `app-error` (lib test) due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "8c43b53a2bfdf75f4a128032c5be79ca1be18297c60b0ef3ff4a9d5432c9e122", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c43b53a2bfdf75f4a128032c5be79ca1be18297c60b0ef3ff4a9d5432c9e122", kill_on_drop: false }`
[INFO] [stdout] 8c43b53a2bfdf75f4a128032c5be79ca1be18297c60b0ef3ff4a9d5432c9e122
