[INFO] fetching crate dress-graph 0.8.3...
[INFO] testing dress-graph-0.8.3 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate dress-graph 0.8.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate dress-graph 0.8.3
[INFO] finished tweaking crates.io crate dress-graph 0.8.3
[INFO] tweaked toml for crates.io crate dress-graph 0.8.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dress-graph 0.8.3 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dress-graph 0.8.3 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff
[INFO] running `Command { std: "docker" "start" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.2.61
[INFO] [stderr]    Compiling dress-graph v0.8.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: suspicious definition of the runtime `malloc` symbol used by the standard library
[INFO] [stdout]    --> src/lib.rs:512:9
[INFO] [stdout]     |
[INFO] [stdout] 512 |         pub fn malloc(size: usize) -> *mut u8;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(usize) -> *mut std::ffi::c_void` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(usize) -> *mut u8`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "malloc")]`, or `#[link_name = "malloc"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 3.66s
[INFO] running `Command { std: "docker" "inspect" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling dress-graph v0.8.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: suspicious definition of the runtime `malloc` symbol used by the standard library
[INFO] [stdout]    --> src/lib.rs:512:9
[INFO] [stdout]     |
[INFO] [stdout] 512 |         pub fn malloc(size: usize) -> *mut u8;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(usize) -> *mut std::ffi::c_void` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(usize) -> *mut u8`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "malloc")]`, or `#[link_name = "malloc"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: suspicious definition of the runtime `malloc` symbol used by the standard library
[INFO] [stdout]    --> src/lib.rs:512:9
[INFO] [stdout]     |
[INFO] [stdout] 512 |         pub fn malloc(size: usize) -> *mut u8;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected `unsafe extern "C" fn(usize) -> *mut std::ffi::c_void` (for the current target)
[INFO] [stdout]             found    `unsafe extern "C" fn(usize) -> *mut u8`
[INFO] [stdout]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "malloc")]`, or `#[link_name = "malloc"]`
[INFO] [stdout]     = help: allow this lint if the signature is compatible
[INFO] [stdout]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling dress-graph v0.8.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: suspicious definition of the runtime `malloc` symbol used by the standard library
[INFO] [stderr]    --> src/lib.rs:512:9
[INFO] [stderr]     |
[INFO] [stderr] 512 |         pub fn malloc(size: usize) -> *mut u8;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected `unsafe extern "C" fn(usize) -> *mut std::ffi::c_void` (for the current target)
[INFO] [stderr]             found    `unsafe extern "C" fn(usize) -> *mut u8`
[INFO] [stderr]     = help: either fix the signature or remove any attributes like `#[unsafe(no_mangle)]`, `#[unsafe(export_name = "malloc")]`, or `#[link_name = "malloc"]`
[INFO] [stderr]     = help: allow this lint if the signature is compatible
[INFO] [stderr]     = note: `#[warn(suspicious_runtime_symbol_definitions)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `dress-graph` (lib) generated 1 warning
[INFO] [stderr] warning: `dress-graph` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 2.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/release/build/dress-graph/0e08553bf453f000/out/dress_graph-0e08553bf453f000)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dress_graph
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 5) - compile ... ok
[INFO] [stdout] test src/lib.rs - DRESS (line 134) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - DRESS (line 134) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:139:63
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_134_0() {
[INFO] [stdout]     |                                      ----------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 139 |                        None, None, Variant::Undirected, false)?;
[INFO] [stdout]     |                                                               ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]     |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]     |
[INFO] [stdout] 135 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_134_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 136 | use dress_graph::{DRESS, Variant};
[INFO] [stdout] ...
[INFO] [stdout] 141 | let d = g.get(0, 2, 100, 1e-6, 1.0);
[INFO] [stdout] 142 +     Ok(())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - DRESS (line 134)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff", kill_on_drop: false }`
[INFO] [stdout] 6a852910cdf9d7bc60397aa6c0b35adae041864aaed9835e8f20d2df3be86aff
