[INFO] updating cached repository https://github.com/rmanoka/tygres-macros
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b22905c0eb1951b2e61297af7ab88fa3d3d417bd
[INFO] testing rmanoka/tygres-macros against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frmanoka%2Ftygres-macros" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rmanoka/tygres-macros on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/rmanoka/tygres-macros
[INFO] finished tweaking git repo https://github.com/rmanoka/tygres-macros
[INFO] tweaked toml for git repo https://github.com/rmanoka/tygres-macros written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/rmanoka/tygres-macros already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1138dfb8f0fa94871a1e69768f14ffc7f2229a3d087fa6a64601129bfc3d2103
[INFO] running `"docker" "start" "-a" "1138dfb8f0fa94871a1e69768f14ffc7f2229a3d087fa6a64601129bfc3d2103"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.4
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling Inflector v0.11.3
[INFO] [stderr]    Compiling darling_core v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.8.2
[INFO] [stderr]    Compiling darling v0.8.2
[INFO] [stderr]    Compiling tygres-macros v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_crate_item_prelude, arbitrary_self_types)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `Type`
[INFO] [stderr]  --> src/builder.rs:3:28
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Ident, TypeParamBound, Field, Type,
[INFO] [stderr]   |                            ^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `TypeParamBound`
[INFO] [stderr]    --> src/schema.rs:219:12
[INFO] [stderr]     |
[INFO] [stderr] 219 |     Ident, TypeParamBound, Field, Type,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `token`
[INFO] [stderr]    --> src/setter.rs:228:8
[INFO] [stderr]     |
[INFO] [stderr] 228 |     *, token,
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `token`
[INFO] [stderr]   --> src/getter.rs:91:8
[INFO] [stderr]    |
[INFO] [stderr] 91 |     *, token,
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `punctuated::Punctuated`, `token`
[INFO] [stderr]    --> src/data.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 |     *, token,
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 101 |     punctuated::Punctuated,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/attrs.rs:63:12
[INFO] [stderr]    |
[INFO] [stderr] 63 |         if (path.segments.len() != 1) { return false; }
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TokenStream`
[INFO] [stderr]   --> src/attrs.rs:90:19
[INFO] [stderr]    |
[INFO] [stderr] 90 | use proc_macro2::{TokenStream, Literal};
[INFO] [stderr]    |                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `TypeParamBound`, `Type`, `token`
[INFO] [stderr]   --> src/attrs.rs:92:15
[INFO] [stderr]    |
[INFO] [stderr] 92 |     *, Ident, TypeParamBound, Field, Type,
[INFO] [stderr]    |               ^^^^^^^^^^^^^^  ^^^^^  ^^^^
[INFO] [stderr] 93 |     punctuated::Punctuated,
[INFO] [stderr] 94 |     token,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `tygres-macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1138dfb8f0fa94871a1e69768f14ffc7f2229a3d087fa6a64601129bfc3d2103"`
[INFO] running `"docker" "rm" "-f" "1138dfb8f0fa94871a1e69768f14ffc7f2229a3d087fa6a64601129bfc3d2103"`
[INFO] [stdout] 1138dfb8f0fa94871a1e69768f14ffc7f2229a3d087fa6a64601129bfc3d2103