[INFO] fetching crate cfg 0.5.0...
[INFO] testing cfg-0.5.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate cfg 0.5.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate cfg 0.5.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69ec01e58fbbb4e38195121b43842da9adf0dfb95818211b273048c820e31380
[INFO] running `Command { std: "docker" "start" "-a" "69ec01e58fbbb4e38195121b43842da9adf0dfb95818211b273048c820e31380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69ec01e58fbbb4e38195121b43842da9adf0dfb95818211b273048c820e31380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69ec01e58fbbb4e38195121b43842da9adf0dfb95818211b273048c820e31380", kill_on_drop: false }`
[INFO] [stdout] 69ec01e58fbbb4e38195121b43842da9adf0dfb95818211b273048c820e31380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25e88ecfd5367326d3c11001d5cbe253646a79f92b7849763a2d16a8cf737918
[INFO] running `Command { std: "docker" "start" "-a" "25e88ecfd5367326d3c11001d5cbe253646a79f92b7849763a2d16a8cf737918", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling optional v0.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling bit-matrix v0.6.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling cfg v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/symbol/source.rs:48:34
[INFO] [stdout]     |
[INFO] [stdout] 48  |           impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout]     |                                    ^                 ^
[INFO] [stdout] ...
[INFO] [stdout] 60  |   impl_generate!(
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 61  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 62  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 63  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 107 | | );
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_generate` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 48  -         impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout] 48  +         impl SymbolContainer for  Symbol $(, $T)*  {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/remap.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         mem::replace(self.grammar.sym_source_mut(), intern.source);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.27s
[INFO] running `Command { std: "docker" "inspect" "25e88ecfd5367326d3c11001d5cbe253646a79f92b7849763a2d16a8cf737918", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e88ecfd5367326d3c11001d5cbe253646a79f92b7849763a2d16a8cf737918", kill_on_drop: false }`
[INFO] [stdout] 25e88ecfd5367326d3c11001d5cbe253646a79f92b7849763a2d16a8cf737918
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21895affadac95bf7556efd2e3171c4720da9ce72673901f289e54257765341b
[INFO] running `Command { std: "docker" "start" "-a" "21895affadac95bf7556efd2e3171c4720da9ce72673901f289e54257765341b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cfg v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/symbol/source.rs:48:34
[INFO] [stdout]     |
[INFO] [stdout] 48  |           impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout]     |                                    ^                 ^
[INFO] [stdout] ...
[INFO] [stdout] 60  |   impl_generate!(
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 61  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 62  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 63  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 107 | | );
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_generate` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 48  -         impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout] 48  +         impl SymbolContainer for  Symbol $(, $T)*  {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/remap.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         mem::replace(self.grammar.sym_source_mut(), intern.source);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary parentheses around type
[INFO] [stdout]    --> src/symbol/source.rs:48:34
[INFO] [stdout]     |
[INFO] [stdout] 48  |           impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout]     |                                    ^                 ^
[INFO] [stdout] ...
[INFO] [stdout] 60  |   impl_generate!(
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 61  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 62  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 63  | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] ...   |
[INFO] [stdout] 106 | |     Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
[INFO] [stdout] 107 | | );
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:13:24
[INFO] [stdout]     |
[INFO] [stdout] 13  | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_parens)]` implied by `#[deny(warnings)]`
[INFO] [stdout]     = note: this error originates in the macro `impl_generate` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 48  -         impl SymbolContainer for ( Symbol $(, $T)* ) {
[INFO] [stdout] 48  +         impl SymbolContainer for  Symbol $(, $T)*  {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/remap.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         mem::replace(self.grammar.sym_source_mut(), intern.source);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:13:24
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cfg` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "21895affadac95bf7556efd2e3171c4720da9ce72673901f289e54257765341b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21895affadac95bf7556efd2e3171c4720da9ce72673901f289e54257765341b", kill_on_drop: false }`
[INFO] [stdout] 21895affadac95bf7556efd2e3171c4720da9ce72673901f289e54257765341b