[INFO] fetching crate gluon_base 0.18.2...
[INFO] checking gluon_base-0.18.2 against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] extracting crate gluon_base 0.18.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate gluon_base 0.18.2 on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gluon_base 0.18.2
[INFO] finished tweaking crates.io crate gluon_base 0.18.2
[INFO] tweaked toml for crates.io crate gluon_base 0.18.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded codespan v0.11.1
[INFO] [stderr]   Downloaded serde_state v0.4.8
[INFO] [stderr]   Downloaded compiletest_rs v0.7.1
[INFO] [stderr]   Downloaded collect-mac v0.1.0
[INFO] [stderr]   Downloaded gluon_codegen v0.18.2
[INFO] [stderr]   Downloaded serde_derive_state v0.4.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 407f456f0b2e18a3e96eed5ead79ff7048fdba45cd07398b4a8cf2a7f708f02d
[INFO] running `Command { std: "docker" "start" "-a" "407f456f0b2e18a3e96eed5ead79ff7048fdba45cd07398b4a8cf2a7f708f02d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "407f456f0b2e18a3e96eed5ead79ff7048fdba45cd07398b4a8cf2a7f708f02d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "407f456f0b2e18a3e96eed5ead79ff7048fdba45cd07398b4a8cf2a7f708f02d", kill_on_drop: false }`
[INFO] [stdout] 407f456f0b2e18a3e96eed5ead79ff7048fdba45cd07398b4a8cf2a7f708f02d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db968fed99c9f23d9d6a56333ff0fa828714913bd2bdcc2d3497cb7ffe26c4bf
[INFO] running `Command { std: "docker" "start" "-a" "db968fed99c9f23d9d6a56333ff0fa828714913bd2bdcc2d3497cb7ffe26c4bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking typed-arena v2.0.2
[INFO] [stderr]    Compiling ahash v0.7.7
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking collect-mac v0.1.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking pretty v0.10.0
[INFO] [stderr]     Checking codespan v0.11.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking ordered-float v2.10.1
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking env_logger v0.9.3
[INFO] [stderr]    Compiling gluon_codegen v0.18.2
[INFO] [stderr]     Checking gluon_base v0.18.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/ast.rs:1328:32
[INFO] [stdout]      |
[INFO] [stdout] 1328 |             struct Guard<'tag>(&'tag $crate::ast::InvariantLifetime<'tag>);
[INFO] [stdout]      |                    -----       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |                    |
[INFO] [stdout]      |                    field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 1346 |         mk_ast_arena!(arena);
[INFO] [stdout]      |         -------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]      = note: this warning originates in the macro `mk_ast_arena` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1328 |             struct Guard<'tag>(());
[INFO] [stdout]      |                                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]     --> src/ast.rs:1328:32
[INFO] [stdout]      |
[INFO] [stdout] 1328 |             struct Guard<'tag>(&'tag $crate::ast::InvariantLifetime<'tag>);
[INFO] [stdout]      |                    -----       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |                    |
[INFO] [stdout]      |                    field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 1346 |         mk_ast_arena!(arena);
[INFO] [stdout]      |         -------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]      = note: this warning originates in the macro `mk_ast_arena` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]      |
[INFO] [stdout] 1328 |             struct Guard<'tag>(());
[INFO] [stdout]      |                                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.74s
[INFO] running `Command { std: "docker" "inspect" "db968fed99c9f23d9d6a56333ff0fa828714913bd2bdcc2d3497cb7ffe26c4bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db968fed99c9f23d9d6a56333ff0fa828714913bd2bdcc2d3497cb7ffe26c4bf", kill_on_drop: false }`
[INFO] [stdout] db968fed99c9f23d9d6a56333ff0fa828714913bd2bdcc2d3497cb7ffe26c4bf