[INFO] crate cfg 0.5.0 is already in cache
[INFO] checking cfg-0.5.0 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate cfg 0.5.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate cfg 0.5.0 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate cfg 0.5.0
[INFO] finished tweaking crates.io crate cfg 0.5.0
[INFO] tweaked toml for crates.io crate cfg 0.5.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dbedbe669d5c752e12d932777a4e78d0c8bc8911ede932f4a93f9be5a220a8aa
[INFO] running `"docker" "start" "-a" "dbedbe669d5c752e12d932777a4e78d0c8bc8911ede932f4a93f9be5a220a8aa"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]     Checking bit-vec v0.6.1
[INFO] [stderr]     Checking optional v0.5.0
[INFO] [stderr]     Checking bit-matrix v0.6.0
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking cfg v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/symbol/source.rs:48:34
[INFO] [stderr]     |
[INFO] [stderr] 48  |           impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 60  | / impl_generate!(
[INFO] [stderr] 61  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 62  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 63  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] ...   |
[INFO] [stderr] 106 | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 107 | | );
[INFO] [stderr]     | |__- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:13:24
[INFO] [stderr]     |
[INFO] [stderr] 13  | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]     |                        ^^^^^^^^
[INFO] [stderr]     = note: `#[deny(unused_parens)]` implied by `#[deny(warnings)]`
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/symbol/source.rs:48:34
[INFO] [stderr]     |
[INFO] [stderr] 48  |           impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 60  | / impl_generate!(
[INFO] [stderr] 61  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 62  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 63  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] ...   |
[INFO] [stderr] 106 | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stderr] 107 | | );
[INFO] [stderr]     | |__- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `cfg`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "dbedbe669d5c752e12d932777a4e78d0c8bc8911ede932f4a93f9be5a220a8aa"`
[INFO] running `"docker" "rm" "-f" "dbedbe669d5c752e12d932777a4e78d0c8bc8911ede932f4a93f9be5a220a8aa"`
[INFO] [stdout] dbedbe669d5c752e12d932777a4e78d0c8bc8911ede932f4a93f9be5a220a8aa