[INFO] fetching crate mirl 9.2.0...
[INFO] testing mirl-9.2.0 against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] extracting crate mirl 9.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mirl 9.2.0
[INFO] finished tweaking crates.io crate mirl 9.2.0
[INFO] tweaked toml for crates.io crate mirl 9.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mirl 9.2.0 on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mirl 9.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 371580b7e83d0e2257d0427c953b3204b883c608df2ae57b257ec14dd5b90bd4
[INFO] running `Command { std: "docker" "start" "-a" "371580b7e83d0e2257d0427c953b3204b883c608df2ae57b257ec14dd5b90bd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "371580b7e83d0e2257d0427c953b3204b883c608df2ae57b257ec14dd5b90bd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "371580b7e83d0e2257d0427c953b3204b883c608df2ae57b257ec14dd5b90bd4", kill_on_drop: false }`
[INFO] [stdout] 371580b7e83d0e2257d0427c953b3204b883c608df2ae57b257ec14dd5b90bd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48dc1f2147a87c54d5062602b47073fa65d0dc9014da6a963dc995d189565202
[INFO] running `Command { std: "docker" "start" "-a" "48dc1f2147a87c54d5062602b47073fa65d0dc9014da6a963dc995d189565202", kill_on_drop: false }`
[INFO] [stderr]    Compiling mirl v9.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of an internal attribute
[INFO] [stdout]    --> src/text/mod.rs:111:1
[INFO] [stdout]     |
[INFO] [stdout] 111 | #[rustc_allow_const_fn_unstable(const_eval_select)] // fallback impl has same behavior
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stdout]     = note: the `#[rustc_allow_const_fn_unstable]` attribute is an internal implementation detail that will never be stable
[INFO] [stdout]     = note: rustc_allow_const_fn_unstable side-steps feature gating and stability checks
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of an internal attribute
[INFO] [stdout]    --> src/text/mod.rs:253:1
[INFO] [stdout]     |
[INFO] [stdout] 253 | #[rustc_allow_const_fn_unstable(const_eval_select)] // fallback impl has same behavior
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stdout]     = note: the `#[rustc_allow_const_fn_unstable]` attribute is an internal implementation detail that will never be stable
[INFO] [stdout]     = note: rustc_allow_const_fn_unstable side-steps feature gating and stability checks
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `rustc_allow_const_fn_unstable`
[INFO] [stdout]   --> src/lib.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | #![feature(rustc_allow_const_fn_unstable)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0635, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mirl` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "48dc1f2147a87c54d5062602b47073fa65d0dc9014da6a963dc995d189565202", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48dc1f2147a87c54d5062602b47073fa65d0dc9014da6a963dc995d189565202", kill_on_drop: false }`
[INFO] [stdout] 48dc1f2147a87c54d5062602b47073fa65d0dc9014da6a963dc995d189565202
