[INFO] fetching crate include_display_mode_tex 0.1.5...
[INFO] testing include_display_mode_tex-0.1.5 against 1.75.0 for beta-1.76-1
[INFO] extracting crate include_display_mode_tex 0.1.5 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate include_display_mode_tex 0.1.5 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate include_display_mode_tex 0.1.5
[INFO] finished tweaking crates.io crate include_display_mode_tex 0.1.5
[INFO] tweaked toml for crates.io crate include_display_mode_tex 0.1.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded relative-path v1.9.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eee690c8cd061b94df044b8a6409594cb9123749349e3243baa044f168efc1dc
[INFO] running `Command { std: "docker" "start" "-a" "eee690c8cd061b94df044b8a6409594cb9123749349e3243baa044f168efc1dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eee690c8cd061b94df044b8a6409594cb9123749349e3243baa044f168efc1dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eee690c8cd061b94df044b8a6409594cb9123749349e3243baa044f168efc1dc", kill_on_drop: false }`
[INFO] [stdout] eee690c8cd061b94df044b8a6409594cb9123749349e3243baa044f168efc1dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c2a8b15541df600f493e803e06eb5cde09271100be1874b3c96a0a80dda2d17
[INFO] running `Command { std: "docker" "start" "-a" "9c2a8b15541df600f493e803e06eb5cde09271100be1874b3c96a0a80dda2d17", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling relative-path v1.9.2
[INFO] [stderr]    Compiling include_display_mode_tex v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `include_display_mode_tex` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9c2a8b15541df600f493e803e06eb5cde09271100be1874b3c96a0a80dda2d17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c2a8b15541df600f493e803e06eb5cde09271100be1874b3c96a0a80dda2d17", kill_on_drop: false }`
[INFO] [stdout] 9c2a8b15541df600f493e803e06eb5cde09271100be1874b3c96a0a80dda2d17
