[INFO] fetching crate memac 0.5.3...
[INFO] checking memac-0.5.3 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate memac 0.5.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate memac 0.5.3 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate memac 0.5.3
[INFO] finished tweaking crates.io crate memac 0.5.3
[INFO] tweaked toml for crates.io crate memac 0.5.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded synctools v0.3.3
[INFO] [stderr]   Downloaded loom v0.7.1
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4481d0c2218d7632ab6645324badbdef82ad37470a3e9bb9b01532eb3774c65e
[INFO] running `Command { std: "docker" "start" "-a" "4481d0c2218d7632ab6645324badbdef82ad37470a3e9bb9b01532eb3774c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4481d0c2218d7632ab6645324badbdef82ad37470a3e9bb9b01532eb3774c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4481d0c2218d7632ab6645324badbdef82ad37470a3e9bb9b01532eb3774c65e", kill_on_drop: false }`
[INFO] [stdout] 4481d0c2218d7632ab6645324badbdef82ad37470a3e9bb9b01532eb3774c65e
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ad06d4916bfe00b19e41a9b27b7a210275ca82e0d0be05e2a04a98b8298cae5
[INFO] running `Command { std: "docker" "start" "-a" "8ad06d4916bfe00b19e41a9b27b7a210275ca82e0d0be05e2a04a98b8298cae5", kill_on_drop: false }`
[INFO] [stderr]     Checking synctools v0.3.3
[INFO] [stderr]     Checking memac v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 549 | SlabSmall!(Slab16, 64, 4, 0, 0xFFFFFFFF | (0b11 << 32), 16);
[INFO] [stdout]     | ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 554 | SlabSmall!(Slab32, 32, 5, 0xFFFFFFFF, 0b111111111, 32);
[INFO] [stdout]     | ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 559 | SlabSmall!(Slab64, 16, 6, 0xFFFFFFFFFFFF, 0b111, 64);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 564 | SlabSmall!(Slab128, 8, 7, 0xFFFFFFFFFFFFFF, 1, 128);
[INFO] [stdout]     | --------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 569 | SlabSmall!(Slab256, 4, 8, 0xFFFFFFFFFFFFFFF, 1, 256);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 | SlabSmall!(Slab512, 2, 9, 0x3FFFFFFFFFFFFFFF, 1, 512);
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 579 | SlabSmall!(Slab1024, 1, 10, 0x7FFFFFFFFFFFFFFF, 1, 1024);
[INFO] [stdout]     | -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:748:13
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let ptr = &mut (self.buf[0]) as *mut u8;
[INFO] [stdout]     |                        ------------- backing allocation comes from here
[INFO] [stdout] 744 |         let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                     ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 748 |             *ptr64 = self as *mut Slab65512 as usize;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memac` (lib) due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 549 | SlabSmall!(Slab16, 64, 4, 0, 0xFFFFFFFF | (0b11 << 32), 16);
[INFO] [stdout]     | ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 554 | SlabSmall!(Slab32, 32, 5, 0xFFFFFFFF, 0b111111111, 32);
[INFO] [stdout]     | ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 559 | SlabSmall!(Slab64, 16, 6, 0xFFFFFFFFFFFF, 0b111, 64);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 564 | SlabSmall!(Slab128, 8, 7, 0xFFFFFFFFFFFFFF, 1, 128);
[INFO] [stdout]     | --------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 569 | SlabSmall!(Slab256, 4, 8, 0xFFFFFFFFFFFFFFF, 1, 256);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 | SlabSmall!(Slab512, 2, 9, 0x3FFFFFFFFFFFFFFF, 1, 512);
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 579 | SlabSmall!(Slab1024, 1, 10, 0x7FFFFFFFFFFFFFFF, 1, 1024);
[INFO] [stdout]     | -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:748:13
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let ptr = &mut (self.buf[0]) as *mut u8;
[INFO] [stdout]     |                        ------------- backing allocation comes from here
[INFO] [stdout] 744 |         let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                     ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 748 |             *ptr64 = self as *mut Slab65512 as usize;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memac` (lib test) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "8ad06d4916bfe00b19e41a9b27b7a210275ca82e0d0be05e2a04a98b8298cae5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ad06d4916bfe00b19e41a9b27b7a210275ca82e0d0be05e2a04a98b8298cae5", kill_on_drop: false }`
[INFO] [stdout] 8ad06d4916bfe00b19e41a9b27b7a210275ca82e0d0be05e2a04a98b8298cae5
[INFO] checking memac-0.5.3 against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] extracting crate memac 0.5.3 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate memac 0.5.3 on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate memac 0.5.3
[INFO] finished tweaking crates.io crate memac 0.5.3
[INFO] tweaked toml for crates.io crate memac 0.5.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3fadbcbd597b9e4ec9a05f885acef5dd053cb5b8f2f7c635ba432ad6daf33c9
[INFO] running `Command { std: "docker" "start" "-a" "b3fadbcbd597b9e4ec9a05f885acef5dd053cb5b8f2f7c635ba432ad6daf33c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3fadbcbd597b9e4ec9a05f885acef5dd053cb5b8f2f7c635ba432ad6daf33c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3fadbcbd597b9e4ec9a05f885acef5dd053cb5b8f2f7c635ba432ad6daf33c9", kill_on_drop: false }`
[INFO] [stdout] b3fadbcbd597b9e4ec9a05f885acef5dd053cb5b8f2f7c635ba432ad6daf33c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28df65d40986ea56abd92ca215c1365933301bce238fbc82e0a980e86a2684a1
[INFO] running `Command { std: "docker" "start" "-a" "28df65d40986ea56abd92ca215c1365933301bce238fbc82e0a980e86a2684a1", kill_on_drop: false }`
[INFO] [stderr]     Checking synctools v0.3.3
[INFO] [stderr]     Checking memac v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 549 | SlabSmall!(Slab16, 64, 4, 0, 0xFFFFFFFF | (0b11 << 32), 16);
[INFO] [stdout]     | ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 554 | SlabSmall!(Slab32, 32, 5, 0xFFFFFFFF, 0b111111111, 32);
[INFO] [stdout]     | ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 559 | SlabSmall!(Slab64, 16, 6, 0xFFFFFFFFFFFF, 0b111, 64);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 564 | SlabSmall!(Slab128, 8, 7, 0xFFFFFFFFFFFFFF, 1, 128);
[INFO] [stdout]     | --------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 569 | SlabSmall!(Slab256, 4, 8, 0xFFFFFFFFFFFFFFF, 1, 256);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 | SlabSmall!(Slab512, 2, 9, 0x3FFFFFFFFFFFFFFF, 1, 512);
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 579 | SlabSmall!(Slab1024, 1, 10, 0x7FFFFFFFFFFFFFFF, 1, 1024);
[INFO] [stdout]     | -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:748:13
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let ptr = &mut (self.buf[0]) as *mut u8;
[INFO] [stdout]     |                        ------------- backing allocation comes from here
[INFO] [stdout] 744 |         let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                     ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 748 |             *ptr64 = self as *mut Slab65512 as usize;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memac` (lib) due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 549 | SlabSmall!(Slab16, 64, 4, 0, 0xFFFFFFFF | (0b11 << 32), 16);
[INFO] [stdout]     | ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 554 | SlabSmall!(Slab32, 32, 5, 0xFFFFFFFF, 0b111111111, 32);
[INFO] [stdout]     | ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 559 | SlabSmall!(Slab64, 16, 6, 0xFFFFFFFFFFFF, 0b111, 64);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 564 | SlabSmall!(Slab128, 8, 7, 0xFFFFFFFFFFFFFF, 1, 128);
[INFO] [stdout]     | --------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 569 | SlabSmall!(Slab256, 4, 8, 0xFFFFFFFFFFFFFFF, 1, 256);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 | SlabSmall!(Slab512, 2, 9, 0x3FFFFFFFFFFFFFFF, 1, 512);
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:471:21
[INFO] [stdout]     |
[INFO] [stdout] 466 |                 let ptr = &mut (self.buf[idx]) as *mut u8;
[INFO] [stdout]     |                                --------------- backing allocation comes from here
[INFO] [stdout] 467 |                 let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                             ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 471 |                     *ptr64 = self as *mut $id as usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 579 | SlabSmall!(Slab1024, 1, 10, 0x7FFFFFFFFFFFFFFF, 1, 1024);
[INFO] [stdout]     | -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout]     = note: this error originates in the macro `SlabSmall` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting references to a bigger memory layout than the backing allocation is undefined behavior, even if the reference is unused
[INFO] [stdout]    --> src/slab.rs:748:13
[INFO] [stdout]     |
[INFO] [stdout] 743 |         let ptr = &mut (self.buf[0]) as *mut u8;
[INFO] [stdout]     |                        ------------- backing allocation comes from here
[INFO] [stdout] 744 |         let ptr64 = ptr as *mut usize;
[INFO] [stdout]     |                     ----------------- casting happend here
[INFO] [stdout] ...
[INFO] [stdout] 748 |             *ptr64 = self as *mut Slab65512 as usize;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `u8` (1 bytes) to `usize` (8 bytes)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memac` (lib test) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "28df65d40986ea56abd92ca215c1365933301bce238fbc82e0a980e86a2684a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28df65d40986ea56abd92ca215c1365933301bce238fbc82e0a980e86a2684a1", kill_on_drop: false }`
[INFO] [stdout] 28df65d40986ea56abd92ca215c1365933301bce238fbc82e0a980e86a2684a1
