[INFO] cloning repository https://github.com/LooMaclin/concat_const_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LooMaclin/concat_const_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bdc5902bdcf36109bf683566f15bfa0021882f43
[INFO] testing LooMaclin/concat_const_example against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LooMaclin/concat_const_example on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LooMaclin/concat_const_example
[INFO] finished tweaking git repo https://github.com/LooMaclin/concat_const_example
[INFO] tweaked toml for git repo https://github.com/LooMaclin/concat_const_example written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/LooMaclin/concat_const_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/Candunc/const-concat`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", 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] 7c5a1d7edbc00f19243b4f139c4c17b950f93bc777c47463759ae571c8d39d86
[INFO] running `Command { std: "docker" "start" "-a" "7c5a1d7edbc00f19243b4f139c4c17b950f93bc777c47463759ae571c8d39d86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c5a1d7edbc00f19243b4f139c4c17b950f93bc777c47463759ae571c8d39d86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c5a1d7edbc00f19243b4f139c4c17b950f93bc777c47463759ae571c8d39d86", kill_on_drop: false }`
[INFO] [stdout] 7c5a1d7edbc00f19243b4f139c4c17b950f93bc777c47463759ae571c8d39d86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50f006a23d0f6a53641ec5076d8747cb42b5187f8f79c6cfdcb1aa5e0127331c
[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" "50f006a23d0f6a53641ec5076d8747cb42b5187f8f79c6cfdcb1aa5e0127331c", kill_on_drop: false }`
[INFO] [stderr]    Compiling const-concat v0.1.1 (https://github.com/Candunc/const-concat?branch=patch-1#7fbd831e)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/const-concat-07bb967c112852f5/7fbd831/src/lib.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(const_fn, const_fn_union, const_str_as_bytes, const_str_len, untagged_unions)]
[INFO] [stdout]    |            ^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: unions may not contain fields that need dropping
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/const-concat-07bb967c112852f5/7fbd831/src/lib.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         from: From,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: wrap the type with `std::mem::ManuallyDrop` and ensure it is manually dropped
[INFO] [stdout]    |
[INFO] [stdout] 29 |         from: std::mem::ManuallyDrop<From>,
[INFO] [stdout]    |               +++++++++++++++++++++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0557, E0740.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-concat` due to 3 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "50f006a23d0f6a53641ec5076d8747cb42b5187f8f79c6cfdcb1aa5e0127331c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50f006a23d0f6a53641ec5076d8747cb42b5187f8f79c6cfdcb1aa5e0127331c", kill_on_drop: false }`
[INFO] [stdout] 50f006a23d0f6a53641ec5076d8747cb42b5187f8f79c6cfdcb1aa5e0127331c