[INFO] fetching crate ab-riscv-primitives 0.0.4...
[INFO] checking ab-riscv-primitives-0.0.4 against 1.95.0 for pr-155915
[INFO] extracting crate ab-riscv-primitives 0.0.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate ab-riscv-primitives 0.0.4
[INFO] finished tweaking crates.io crate ab-riscv-primitives 0.0.4
[INFO] tweaked toml for crates.io crate ab-riscv-primitives 0.0.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ab-riscv-primitives 0.0.4 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ab-riscv-primitives 0.0.4 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ab-riscv-macros-common v0.0.4
[INFO] [stderr]   Downloaded ab-riscv-macros-common v0.0.3
[INFO] [stderr]   Downloaded ab-riscv-macros v0.0.4
[INFO] [stderr]   Downloaded ab-riscv-macros-impl v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7951a0bbf8816e23494fac07dfb542d53e35de1b8f18d154632e64720296b464
[INFO] running `Command { std: "docker" "start" "-a" "7951a0bbf8816e23494fac07dfb542d53e35de1b8f18d154632e64720296b464", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7951a0bbf8816e23494fac07dfb542d53e35de1b8f18d154632e64720296b464", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7951a0bbf8816e23494fac07dfb542d53e35de1b8f18d154632e64720296b464", kill_on_drop: false }`
[INFO] [stdout] 7951a0bbf8816e23494fac07dfb542d53e35de1b8f18d154632e64720296b464
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d78f3573d65d491a3467cbd869dba96de027e99c1376d07a9a02ed0ed8411d0
[INFO] running `Command { std: "docker" "start" "-a" "9d78f3573d65d491a3467cbd869dba96de027e99c1376d07a9a02ed0ed8411d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling ab-riscv-macros-common v0.0.4
[INFO] [stderr]    Compiling ab-riscv-macros-common v0.0.3
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling ab-riscv-macros-impl v0.0.3
[INFO] [stderr]    Compiling ab-riscv-macros v0.0.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/ab-riscv-macros-0.0.4/src/lib.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout]  5 | /     feature(
[INFO] [stdout]  6 | |         bool_to_result,
[INFO] [stdout]  7 | |         map_try_insert,
[INFO] [stdout]  8 | |         result_option_map_or_default,
[INFO] [stdout]  9 | |         try_blocks
[INFO] [stdout] 10 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ab-riscv-macros` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9d78f3573d65d491a3467cbd869dba96de027e99c1376d07a9a02ed0ed8411d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d78f3573d65d491a3467cbd869dba96de027e99c1376d07a9a02ed0ed8411d0", kill_on_drop: false }`
[INFO] [stdout] 9d78f3573d65d491a3467cbd869dba96de027e99c1376d07a9a02ed0ed8411d0
