[INFO] fetching crate compiler_builtins 0.1.52...
[INFO] testing compiler_builtins-0.1.52 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate compiler_builtins 0.1.52 into /workspace/builds/worker-37/source
[INFO] validating manifest of crates.io crate compiler_builtins 0.1.52 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate compiler_builtins 0.1.52
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate compiler_builtins 0.1.52
[INFO] tweaked toml for crates.io crate compiler_builtins 0.1.52 written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] crate crates.io crate compiler_builtins 0.1.52 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ede791c85eff06057d62e136d1ec7f8c8e1c1ba5c02351a188763768fbfea64
[INFO] running `Command { std: "docker" "start" "-a" "8ede791c85eff06057d62e136d1ec7f8c8e1c1ba5c02351a188763768fbfea64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ede791c85eff06057d62e136d1ec7f8c8e1c1ba5c02351a188763768fbfea64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ede791c85eff06057d62e136d1ec7f8c8e1c1ba5c02351a188763768fbfea64", kill_on_drop: false }`
[INFO] [stdout] 8ede791c85eff06057d62e136d1ec7f8c8e1c1ba5c02351a188763768fbfea64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a9ec47b74cc0656451bc3a78a88b976e5dd9b2a1e16385fee0f2b86429f87c1
[INFO] running `Command { std: "docker" "start" "-a" "9a9ec47b74cc0656451bc3a78a88b976e5dd9b2a1e16385fee0f2b86429f87c1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling compiler_builtins v0.1.52 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]  --> src/float/pow.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut pow = i32::abs_diff(b, 0);
[INFO] [stdout]   |                   ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]   = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]   = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]   = help: call with fully qualified syntax `Int::abs_diff(...)` to keep using the current method
[INFO] [stdout]   = help: add `#![feature(int_abs_diff)]` to the crate attributes to enable `num::<impl i32>::abs_diff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `Command { std: "docker" "inspect" "9a9ec47b74cc0656451bc3a78a88b976e5dd9b2a1e16385fee0f2b86429f87c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a9ec47b74cc0656451bc3a78a88b976e5dd9b2a1e16385fee0f2b86429f87c1", kill_on_drop: false }`
[INFO] [stdout] 9a9ec47b74cc0656451bc3a78a88b976e5dd9b2a1e16385fee0f2b86429f87c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d4e2e9d9554c2df308e14a3ea31557b1f2c8a93a801dac3f8a9cdfbded0fc7e
[INFO] running `Command { std: "docker" "start" "-a" "2d4e2e9d9554c2df308e14a3ea31557b1f2c8a93a801dac3f8a9cdfbded0fc7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling compiler_builtins v0.1.52 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]  --> src/float/pow.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut pow = i32::abs_diff(b, 0);
[INFO] [stdout]   |                   ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]   = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]   = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]   = help: call with fully qualified syntax `Int::abs_diff(...)` to keep using the current method
[INFO] [stdout]   = help: add `#![feature(int_abs_diff)]` to the crate attributes to enable `num::<impl i32>::abs_diff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `panic_handler`
[INFO] [stdout]   --> examples/intrinsics.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | extern crate panic_handler;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compiler_builtins` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2d4e2e9d9554c2df308e14a3ea31557b1f2c8a93a801dac3f8a9cdfbded0fc7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d4e2e9d9554c2df308e14a3ea31557b1f2c8a93a801dac3f8a9cdfbded0fc7e", kill_on_drop: false }`
[INFO] [stdout] 2d4e2e9d9554c2df308e14a3ea31557b1f2c8a93a801dac3f8a9cdfbded0fc7e