[INFO] fetching crate i-o 0.4.7...
[INFO] testing i-o-0.4.7 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate i-o 0.4.7 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate i-o 0.4.7
[INFO] finished tweaking crates.io crate i-o 0.4.7
[INFO] tweaked toml for crates.io crate i-o 0.4.7 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate i-o 0.4.7 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 52 packages to latest compatible versions
[INFO] [stderr]       Adding quickcheck v0.7.2 (available: v1.1.0)
[INFO] [stderr]       Adding quickcheck_macros v0.7.0 (available: v1.2.0)
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb756b8113be34792271b4c644dea7a0ca1fd1ae79fde9daccb2481e7e106b18
[INFO] running `Command { std: "docker" "start" "-a" "bb756b8113be34792271b4c644dea7a0ca1fd1ae79fde9daccb2481e7e106b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb756b8113be34792271b4c644dea7a0ca1fd1ae79fde9daccb2481e7e106b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb756b8113be34792271b4c644dea7a0ca1fd1ae79fde9daccb2481e7e106b18", kill_on_drop: false }`
[INFO] [stdout] bb756b8113be34792271b4c644dea7a0ca1fd1ae79fde9daccb2481e7e106b18
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12795dc630f000e60f09a373100c095a697b379a831aef21edd84e4755d28418
[INFO] running `Command { std: "docker" "start" "-a" "12795dc630f000e60f09a373100c095a697b379a831aef21edd84e4755d28418", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling ptr v0.2.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling hash-table v0.2.5
[INFO] [stderr]    Compiling containers v0.9.13
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling heap v0.1.0
[INFO] [stderr]    Compiling rel v0.2.0
[INFO] [stderr]    Compiling abort v0.1.3
[INFO] [stderr]    Compiling i-o v0.4.7 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling fallible v0.1.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr] warning: i-o@0.4.7: cannot set `RUSTC_BOOTSTRAP=1` from build script of `i-o v0.4.7 (/opt/rustwide/workdir)`.
[INFO] [stderr] note: crates cannot set `RUSTC_BOOTSTRAP` themselves, as doing so would subvert the stability guarantees of Rust for your project.
[INFO] [stderr]    Compiling loca v0.7.4
[INFO] [stderr]    Compiling default_allocator v0.3.0
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:24:46
[INFO] [stdout]    |
[INFO] [stdout] 24 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:26:46
[INFO] [stdout]    |
[INFO] [stdout] 26 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:31:46
[INFO] [stdout]    |
[INFO] [stdout] 31 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:33:46
[INFO] [stdout]    |
[INFO] [stdout] 33 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:38:46
[INFO] [stdout]    |
[INFO] [stdout] 38 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 22 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 22 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:24:46
[INFO] [stdout]    |
[INFO] [stdout] 24 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 24 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 24 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:26:46
[INFO] [stdout]    |
[INFO] [stdout] 26 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 26 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 26 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:31:46
[INFO] [stdout]    |
[INFO] [stdout] 31 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 31 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 31 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:33:46
[INFO] [stdout]    |
[INFO] [stdout] 33 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 33 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 33 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_allocator_nounwind` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/default_allocator-0.3.0/src/lib.rs:38:46
[INFO] [stdout]    |
[INFO] [stdout] 38 |     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: a built-in attribute with a similar name exists
[INFO] [stdout]    |
[INFO] [stdout] 38 -     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_nounwind)]
[INFO] [stdout] 38 +     #[cfg_attr(not(feature = "stable-rust"), rustc_allocator_zeroed)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `default_allocator` (lib) due to 12 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "12795dc630f000e60f09a373100c095a697b379a831aef21edd84e4755d28418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12795dc630f000e60f09a373100c095a697b379a831aef21edd84e4755d28418", kill_on_drop: false }`
[INFO] [stdout] 12795dc630f000e60f09a373100c095a697b379a831aef21edd84e4755d28418