[INFO] fetching crate prefix-varint 0.0.1-alpha.6...
[INFO] testing prefix-varint-0.0.1-alpha.6 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate prefix-varint 0.0.1-alpha.6 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate prefix-varint 0.0.1-alpha.6
[INFO] finished tweaking crates.io crate prefix-varint 0.0.1-alpha.6
[INFO] tweaked toml for crates.io crate prefix-varint 0.0.1-alpha.6 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate prefix-varint 0.0.1-alpha.6 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 70 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.7.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded criterion-plot v0.4.5
[INFO] [stderr]   Downloaded criterion v0.3.6
[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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] edd466ddd1a1223c28c7ee4a71e88c9cbb3f22f6edec1534b1858e4205698e92
[INFO] running `Command { std: "docker" "start" "-a" "edd466ddd1a1223c28c7ee4a71e88c9cbb3f22f6edec1534b1858e4205698e92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "edd466ddd1a1223c28c7ee4a71e88c9cbb3f22f6edec1534b1858e4205698e92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edd466ddd1a1223c28c7ee4a71e88c9cbb3f22f6edec1534b1858e4205698e92", kill_on_drop: false }`
[INFO] [stdout] edd466ddd1a1223c28c7ee4a71e88c9cbb3f22f6edec1534b1858e4205698e92
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91f67eb20131290c45cd7011324d240649dbce9bd0a5346f712bf479bb2dfa7e
[INFO] running `Command { std: "docker" "start" "-a" "91f67eb20131290c45cd7011324d240649dbce9bd0a5346f712bf479bb2dfa7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling prefix-varint v0.0.1-alpha.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0635]: unknown feature `cursor_remaining`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cursor_remaining)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prefix-varint` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "91f67eb20131290c45cd7011324d240649dbce9bd0a5346f712bf479bb2dfa7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91f67eb20131290c45cd7011324d240649dbce9bd0a5346f712bf479bb2dfa7e", kill_on_drop: false }`
[INFO] [stdout] 91f67eb20131290c45cd7011324d240649dbce9bd0a5346f712bf479bb2dfa7e