[INFO] fetching crate ffi-std 0.1.0...
[INFO] checking ffi-std-0.1.0 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate ffi-std 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate ffi-std 0.1.0 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ffi-std 0.1.0
[INFO] finished tweaking crates.io crate ffi-std 0.1.0
[INFO] tweaked toml for crates.io crate ffi-std 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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] 31f50fa5271dd200a6c57913e5a2303470c52cb053418fb40233839e4e006514
[INFO] running `Command { std: "docker" "start" "-a" "31f50fa5271dd200a6c57913e5a2303470c52cb053418fb40233839e4e006514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31f50fa5271dd200a6c57913e5a2303470c52cb053418fb40233839e4e006514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f50fa5271dd200a6c57913e5a2303470c52cb053418fb40233839e4e006514", kill_on_drop: false }`
[INFO] [stdout] 31f50fa5271dd200a6c57913e5a2303470c52cb053418fb40233839e4e006514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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] f9ffb08e127976cd500cbdc69cbb3719ac8d7d75adf2e7da1188b757f8c4ca64
[INFO] running `Command { std: "docker" "start" "-a" "f9ffb08e127976cd500cbdc69cbb3719ac8d7d75adf2e7da1188b757f8c4ca64", kill_on_drop: false }`
[INFO] [stderr]     Checking ffi-std v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub const unsafe fn get_mut(&mut self) -> &mut T {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:39:44
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub const unsafe fn get_mut(&mut self) -> &mut T {
[INFO] [stdout]    |                                               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `transmute` is not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:40:3
[INFO] [stdout]    |
[INFO] [stdout] 40 |         std::mem::transmute(self)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #53605 <https://github.com/rust-lang/rust/issues/53605> for more information
[INFO] [stdout]    = help: add `#![feature(const_fn_transmute)]` to the crate attributes to enable
[INFO] [stdout]    = note: `transmute` is only allowed in constants and statics for now
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ffi-std`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub const unsafe fn get_mut(&mut self) -> &mut T {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: mutable references are not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:39:44
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub const unsafe fn get_mut(&mut self) -> &mut T {
[INFO] [stdout]    |                                               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
[INFO] [stdout]    = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `transmute` is not allowed in constant functions
[INFO] [stdout]   --> src/lib.rs:40:3
[INFO] [stdout]    |
[INFO] [stdout] 40 |         std::mem::transmute(self)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #53605 <https://github.com/rust-lang/rust/issues/53605> for more information
[INFO] [stdout]    = help: add `#![feature(const_fn_transmute)]` to the crate attributes to enable
[INFO] [stdout]    = note: `transmute` is only allowed in constants and statics for now
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f9ffb08e127976cd500cbdc69cbb3719ac8d7d75adf2e7da1188b757f8c4ca64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9ffb08e127976cd500cbdc69cbb3719ac8d7d75adf2e7da1188b757f8c4ca64", kill_on_drop: false }`
[INFO] [stdout] f9ffb08e127976cd500cbdc69cbb3719ac8d7d75adf2e7da1188b757f8c4ca64