[INFO] fetching crate minicdn_macros 0.2.4...
[INFO] testing minicdn_macros-0.2.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate minicdn_macros 0.2.4 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate minicdn_macros 0.2.4
[INFO] finished tweaking crates.io crate minicdn_macros 0.2.4
[INFO] tweaked toml for crates.io crate minicdn_macros 0.2.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate minicdn_macros 0.2.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 69 packages to latest compatible versions
[INFO] [stderr]       Adding litrs v0.2.3 (available: v1.0.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.108)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded minicdn_core v0.2.4
[INFO] [stderr]   Downloaded webp v0.3.1
[INFO] [stderr]   Downloaded libwebp-sys v0.9.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee0e2687853b798ac9d0349214ca19dbb3f29984652a007ecd4ff61d72a89cb0
[INFO] running `Command { std: "docker" "start" "-a" "ee0e2687853b798ac9d0349214ca19dbb3f29984652a007ecd4ff61d72a89cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee0e2687853b798ac9d0349214ca19dbb3f29984652a007ecd4ff61d72a89cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee0e2687853b798ac9d0349214ca19dbb3f29984652a007ecd4ff61d72a89cb0", kill_on_drop: false }`
[INFO] [stdout] ee0e2687853b798ac9d0349214ca19dbb3f29984652a007ecd4ff61d72a89cb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd79574e565733a9924443283075769c84fd3876edeebe34e1d89d924fd57841
[INFO] running `Command { std: "docker" "start" "-a" "cd79574e565733a9924443283075769c84fd3876edeebe34e1d89d924fd57841", kill_on_drop: false }`
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling litrs v0.2.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling minicdn_core v0.2.4
[INFO] [stderr]    Compiling minicdn_macros v0.2.4 (/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(proc_macro_span)]
[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:167:59
[INFO] [stdout]     |
[INFO] [stdout] 167 |         let mut root_path = proc_macro::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] 167 -         let mut root_path = proc_macro::Span::call_site().source_file().path();
[INFO] [stdout] 167 +         let mut root_path = proc_macro::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 `minicdn_macros` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cd79574e565733a9924443283075769c84fd3876edeebe34e1d89d924fd57841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd79574e565733a9924443283075769c84fd3876edeebe34e1d89d924fd57841", kill_on_drop: false }`
[INFO] [stdout] cd79574e565733a9924443283075769c84fd3876edeebe34e1d89d924fd57841