[INFO] fetching crate rhythmc_macros 0.0.2...
[INFO] testing rhythmc_macros-0.0.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate rhythmc_macros 0.0.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate rhythmc_macros 0.0.2
[INFO] finished tweaking crates.io crate rhythmc_macros 0.0.2
[INFO] tweaked toml for crates.io crate rhythmc_macros 0.0.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rhythmc_macros 0.0.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] [stderr]       Adding glsl v6.0.2 (available: v7.0.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glsl v6.0.2
[INFO] [stderr]   Downloaded rhythmc_compiler v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 625ad3e15c326fc678bcd415843b0285bcf0fca208e361e22bfbefdbe6329581
[INFO] running `Command { std: "docker" "start" "-a" "625ad3e15c326fc678bcd415843b0285bcf0fca208e361e22bfbefdbe6329581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "625ad3e15c326fc678bcd415843b0285bcf0fca208e361e22bfbefdbe6329581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "625ad3e15c326fc678bcd415843b0285bcf0fca208e361e22bfbefdbe6329581", kill_on_drop: false }`
[INFO] [stdout] 625ad3e15c326fc678bcd415843b0285bcf0fca208e361e22bfbefdbe6329581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd2782deb3cdeb7eaef3c9b37a96c8e81ac276fcb5442806e43ca2cd281efa10
[INFO] running `Command { std: "docker" "start" "-a" "fd2782deb3cdeb7eaef3c9b37a96c8e81ac276fcb5442806e43ca2cd281efa10", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling glsl v6.0.2
[INFO] [stderr]    Compiling rhythmc_compiler v0.0.2
[INFO] [stderr]    Compiling rhythmc_macros v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |   custom_inner_attributes,
[INFO] [stdout] 3 | |   proc_macro_span,
[INFO] [stdout] 4 | |   proc_macro_diagnostic,
[INFO] [stdout] 5 | |   proc_macro_def_site
[INFO] [stdout] 6 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `source_file` found for struct `proc_macro::Span` in the current scope
[INFO] [stdout]   --> src/lib.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 |     Span::call_site().source_file().path(),
[INFO] [stdout]    |                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `source` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 32 -     Span::call_site().source_file().path(),
[INFO] [stdout] 32 +     Span::call_site().source().path(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rhythmc_macros` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "fd2782deb3cdeb7eaef3c9b37a96c8e81ac276fcb5442806e43ca2cd281efa10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd2782deb3cdeb7eaef3c9b37a96c8e81ac276fcb5442806e43ca2cd281efa10", kill_on_drop: false }`
[INFO] [stdout] fd2782deb3cdeb7eaef3c9b37a96c8e81ac276fcb5442806e43ca2cd281efa10