[INFO] cloning repository https://github.com/nathanfaucett/rs-persistent_vector
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nathanfaucett/rs-persistent_vector" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-persistent_vector", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-persistent_vector'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fd42d8b124aa8456855b32019a98fb8a7627479
[INFO] testing nathanfaucett/rs-persistent_vector against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathanfaucett%2Frs-persistent_vector" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nathanfaucett/rs-persistent_vector on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nathanfaucett/rs-persistent_vector
[INFO] finished tweaking git repo https://github.com/nathanfaucett/rs-persistent_vector
[INFO] tweaked toml for git repo https://github.com/nathanfaucett/rs-persistent_vector written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/nathanfaucett/rs-persistent_vector already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0af1fb8287596540eb2bbb3d8db54fa054add7202f27afb901b3c4e3a18e067
[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" "e0af1fb8287596540eb2bbb3d8db54fa054add7202f27afb901b3c4e3a18e067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0af1fb8287596540eb2bbb3d8db54fa054add7202f27afb901b3c4e3a18e067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0af1fb8287596540eb2bbb3d8db54fa054add7202f27afb901b3c4e3a18e067", kill_on_drop: false }`
[INFO] [stdout] e0af1fb8287596540eb2bbb3d8db54fa054add7202f27afb901b3c4e3a18e067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f5003caba94084ff674e4b8e2ac83216c1e41e89d9d5e679a33fe489d5d66b4
[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" "4f5003caba94084ff674e4b8e2ac83216c1e41e89d9d5e679a33fe489d5d66b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling collection_traits v0.1.0 (https://github.com/nathanfaucett/rs-collection_traits#516b19e4)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/516b19e/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(custom_attribute)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/516b19e/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `collection_traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4f5003caba94084ff674e4b8e2ac83216c1e41e89d9d5e679a33fe489d5d66b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f5003caba94084ff674e4b8e2ac83216c1e41e89d9d5e679a33fe489d5d66b4", kill_on_drop: false }`
[INFO] [stdout] 4f5003caba94084ff674e4b8e2ac83216c1e41e89d9d5e679a33fe489d5d66b4