[INFO] fetching crate mark-flaky-tests 1.0.2...
[INFO] testing mark-flaky-tests-1.0.2 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-3
[INFO] extracting crate mark-flaky-tests 1.0.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mark-flaky-tests 1.0.2
[INFO] finished tweaking crates.io crate mark-flaky-tests 1.0.2
[INFO] tweaked toml for crates.io crate mark-flaky-tests 1.0.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mark-flaky-tests 1.0.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 33 packages to highest compatible versions
[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-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723
[INFO] running `Command { std: "docker" "start" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723", 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" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723" "/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" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723", 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" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling unicode-ident v1.0.27
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling equivalent v1.0.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v2.14.2
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling mark-flaky-tests-macro v1.0.2
[INFO] [stderr]    Compiling mark-flaky-tests v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0119]: conflicting implementations of trait `IsFailure` for type `!`
[INFO] [stdout]   --> src/lib.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     impl IsFailure for std::convert::Infallible {
[INFO] [stdout]    |     ------------------------------------------- first implementation here
[INFO] [stdout] ...
[INFO] [stdout] 71 |     impl IsFailure for Never {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `!`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0119`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mark-flaky-tests` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723", kill_on_drop: false }`
[INFO] [stdout] a48ee88987825e09fa255926cb6aeb00a1a404d603a4ac73fe9c5614c9982723