[INFO] fetching crate hifive 0.2.0...
[INFO] checking hifive-0.2.0 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate hifive 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate hifive 0.2.0 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hifive 0.2.0
[INFO] finished tweaking crates.io crate hifive 0.2.0
[INFO] tweaked toml for crates.io crate hifive 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded riscv v0.3.0
[INFO] [stderr]   Downloaded e310x-hal v0.2.0
[INFO] [stderr]   Downloaded riscv-rt v0.3.0
[INFO] [stderr]   Downloaded e310x v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6328792e3b800876c09e1d9379fa3808d4acfd7224bc0d46ca953b517b7b5787
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6328792e3b800876c09e1d9379fa3808d4acfd7224bc0d46ca953b517b7b5787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6328792e3b800876c09e1d9379fa3808d4acfd7224bc0d46ca953b517b7b5787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6328792e3b800876c09e1d9379fa3808d4acfd7224bc0d46ca953b517b7b5787", kill_on_drop: false }`
[INFO] [stdout] 6328792e3b800876c09e1d9379fa3808d4acfd7224bc0d46ca953b517b7b5787
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6fca64f878815d3a4c2746929db1d6bc47042b4bda1f6a936a3dd4530c1f5784
[INFO] running `Command { std: "docker" "start" "-a" "6fca64f878815d3a4c2746929db1d6bc47042b4bda1f6a936a3dd4530c1f5784", kill_on_drop: false }`
[INFO] [stderr]    Compiling riscv-rt v0.3.0
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling e310x-hal v0.2.0
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]     Checking riscv v0.3.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.3.0/src/lib.rs:169:12
[INFO] [stdout]     |
[INFO] [stdout] 169 | #![feature(panic_implementation)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: subsumed by `#[panic_handler]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `panic_implementation` in this scope
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.3.0/src/lang_items.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[panic_implementation]
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `riscv-rt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6fca64f878815d3a4c2746929db1d6bc47042b4bda1f6a936a3dd4530c1f5784", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fca64f878815d3a4c2746929db1d6bc47042b4bda1f6a936a3dd4530c1f5784", kill_on_drop: false }`
[INFO] [stdout] 6fca64f878815d3a4c2746929db1d6bc47042b4bda1f6a936a3dd4530c1f5784