[INFO] fetching crate ulib 0.3.3...
[INFO] testing ulib-0.3.3 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate ulib 0.3.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate ulib 0.3.3
[INFO] finished tweaking crates.io crate ulib 0.3.3
[INFO] tweaked toml for crates.io crate ulib 0.3.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ulib 0.3.3 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "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" "+33835004928d3bf65db4d4712e1330766263b0bd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 57 packages to latest compatible versions
[INFO] [stderr]       Adding cc v1.0.106 (available: v1.2.62)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6033751b1a59a0248041724f3590dce17f4b7fd23b9b0886ac19c4501bceaf12
[INFO] running `Command { std: "docker" "start" "-a" "6033751b1a59a0248041724f3590dce17f4b7fd23b9b0886ac19c4501bceaf12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6033751b1a59a0248041724f3590dce17f4b7fd23b9b0886ac19c4501bceaf12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6033751b1a59a0248041724f3590dce17f4b7fd23b9b0886ac19c4501bceaf12", kill_on_drop: false }`
[INFO] [stdout] 6033751b1a59a0248041724f3590dce17f4b7fd23b9b0886ac19c4501bceaf12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cccd79db1d4c52da20879efdf7c5d4f54b72389016995ea6bb5cd1ab7303a53e
[INFO] running `Command { std: "docker" "start" "-a" "cccd79db1d4c52da20879efdf7c5d4f54b72389016995ea6bb5cd1ab7303a53e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.106
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling num-conv v0.2.1
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling num_threads v0.1.7
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling tree-sitter v0.20.10
[INFO] [stderr]    Compiling tree-sitter-cpp v0.20.5
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling simplelog v0.12.2
[INFO] [stderr]    Compiling clilog v0.2.3
[INFO] [stderr]    Compiling ulib-derive v0.1.0
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling ucc v0.2.1
[INFO] [stderr]    Compiling ulib v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]    --> src/uvec.rs:279:13
[INFO] [stdout]     |
[INFO] [stdout] 279 |             (&mut *(self as *const UVec<T> as *mut UVec<T>))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]     = note: even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get`
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ulib` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "cccd79db1d4c52da20879efdf7c5d4f54b72389016995ea6bb5cd1ab7303a53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cccd79db1d4c52da20879efdf7c5d4f54b72389016995ea6bb5cd1ab7303a53e", kill_on_drop: false }`
[INFO] [stdout] cccd79db1d4c52da20879efdf7c5d4f54b72389016995ea6bb5cd1ab7303a53e
