[INFO] fetching crate rowan 0.15.13...
[INFO] checking rowan-0.15.13 against master#158f00a1c5175648af6f6099b075f78d1d014a28 for pr-121251
[INFO] extracting crate rowan 0.15.13 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rowan 0.15.13 on toolchain 158f00a1c5175648af6f6099b075f78d1d014a28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rowan 0.15.13
[INFO] finished tweaking crates.io crate rowan 0.15.13
[INFO] tweaked toml for crates.io crate rowan 0.15.13 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate rowan 0.15.13 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded m_lexer v0.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b850f9429e31368d4d701567a0cf05519295851785dfde365bca83256ee673f3
[INFO] running `Command { std: "docker" "start" "-a" "b850f9429e31368d4d701567a0cf05519295851785dfde365bca83256ee673f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b850f9429e31368d4d701567a0cf05519295851785dfde365bca83256ee673f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b850f9429e31368d4d701567a0cf05519295851785dfde365bca83256ee673f3", kill_on_drop: false }`
[INFO] [stdout] b850f9429e31368d4d701567a0cf05519295851785dfde365bca83256ee673f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5df51f7ac6025f1406e60eade528b1da09131e24518f996385a8599fcb793c5d
[INFO] running `Command { std: "docker" "start" "-a" "5df51f7ac6025f1406e60eade528b1da09131e24518f996385a8599fcb793c5d", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking countme v3.0.1
[INFO] [stderr]     Checking text-size v1.1.1
[INFO] [stderr]     Checking rowan v0.15.13 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking aho-corasick v1.1.1
[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/green/node.rs:199:35
[INFO] [stdout]     |
[INFO] [stdout] 198 |             let repr: &Repr = &self.ptr;
[INFO] [stdout]     |                                -------- backing allocation comes from here
[INFO] [stdout] 199 |             let repr: &ReprThin = &*(repr as *const Repr as *const ReprThin);
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `ThinArc<GreenNodeHead, GreenChild>` (8 bytes) to `HeaderSlice<GreenNodeHead, [GreenChild; 0]>` (16 bytes)
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[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/green/token.rs:141:35
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let repr: &Repr = &self.ptr;
[INFO] [stdout]     |                                -------- backing allocation comes from here
[INFO] [stdout] 141 |             let repr: &ReprThin = &*(repr as *const Repr as *const ReprThin);
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: casting from `ThinArc<GreenTokenHead, u8>` (8 bytes) to `HeaderSlice<GreenTokenHead, [u8; 0]>` (16 bytes)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]   --> src/arc.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         this.ptr() == other.ptr()
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ambiguous_wide_pointer_comparisons)]` on by default
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]    |
[INFO] [stdout] 86 |         std::ptr::addr_eq(this.ptr(), other.ptr())
[INFO] [stdout]    |         ++++++++++++++++++          ~            +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]    |
[INFO] [stdout] 86 |         std::ptr::eq(this.ptr(), other.ptr())
[INFO] [stdout]    |         +++++++++++++          ~            +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rowan` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5df51f7ac6025f1406e60eade528b1da09131e24518f996385a8599fcb793c5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5df51f7ac6025f1406e60eade528b1da09131e24518f996385a8599fcb793c5d", kill_on_drop: false }`
[INFO] [stdout] 5df51f7ac6025f1406e60eade528b1da09131e24518f996385a8599fcb793c5d
