[INFO] crate lamcal 0.4.0 is already in cache
[INFO] testing lamcal-0.4.0 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate lamcal 0.4.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate lamcal 0.4.0 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate lamcal 0.4.0
[INFO] finished tweaking crates.io crate lamcal 0.4.0
[INFO] tweaked toml for crates.io crate lamcal 0.4.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b4f95ca08108e7627eb715aa09ca57680fa1d7078f6de8ea113424800f77c493
[INFO] running `"docker" "start" "-a" "b4f95ca08108e7627eb715aa09ca57680fa1d7078f6de8ea113424800f77c493"`
[INFO] [stderr]    Compiling lamcal v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/reduction/mod.rs:734:25
[INFO] [stderr]     |
[INFO] [stderr] 734 |             if let Some(mut expand_with) = maybe_expand_with {
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.19s
[INFO] running `"docker" "inspect" "b4f95ca08108e7627eb715aa09ca57680fa1d7078f6de8ea113424800f77c493"`
[INFO] running `"docker" "rm" "-f" "b4f95ca08108e7627eb715aa09ca57680fa1d7078f6de8ea113424800f77c493"`
[INFO] [stdout] b4f95ca08108e7627eb715aa09ca57680fa1d7078f6de8ea113424800f77c493
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6f4908062930ba10cf26975b7eaa8eab58ce93f77cb6803d8ec46e09313de658
[INFO] running `"docker" "start" "-a" "6f4908062930ba10cf26975b7eaa8eab58ce93f77cb6803d8ec46e09313de658"`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.3.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/reduction/mod.rs:734:25
[INFO] [stderr]     |
[INFO] [stderr] 734 |             if let Some(mut expand_with) = maybe_expand_with {
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rand_xoshiro v0.1.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling bstr v0.2.12
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling tinytemplate v1.0.3
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling version-sync v0.5.0
[INFO] [stderr]    Compiling rusty-fork v0.2.2
[INFO] [stderr]    Compiling criterion-plot v0.3.1
[INFO] [stderr]    Compiling proptest v0.8.7
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr] error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-0.8.7/src/arbitrary/_core/iter.rs:44:23
[INFO] [stderr]    |
[INFO] [stderr] 44 |         base.prop_map(Iterator::cloned).boxed()
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: first, the lifetime cannot outlive the lifetime `'a` as defined on the impl at 35:6...
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-0.8.7/src/arbitrary/_core/iter.rs:35:6
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl<'a, T: 'static + Clone, A: fmt::Debug + 'static + Iterator<Item = &'a T>>
[INFO] [stderr]    |      ^^
[INFO] [stderr] note: ...so that the types are compatible
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-0.8.7/src/arbitrary/_core/iter.rs:44:23
[INFO] [stderr]    |
[INFO] [stderr] 44 |         base.prop_map(Iterator::cloned).boxed()
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: expected  `&'a T`
[INFO] [stderr]               found  `&T`
[INFO] [stderr]    = note: but, the lifetime must be valid for the static lifetime...
[INFO] [stderr] note: ...so that the type `strategy::map::Map<S, fn(A) -> core::iter::Cloned<A> {<A as core::iter::Iterator>::cloned::<'_, T>}>` will meet its required lifetime bounds
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proptest-0.8.7/src/arbitrary/_core/iter.rs:44:41
[INFO] [stderr]    |
[INFO] [stderr] 44 |         base.prop_map(Iterator::cloned).boxed()
[INFO] [stderr]    |                                         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0495`.
[INFO] [stderr] error: could not compile `proptest`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6f4908062930ba10cf26975b7eaa8eab58ce93f77cb6803d8ec46e09313de658"`
[INFO] running `"docker" "rm" "-f" "6f4908062930ba10cf26975b7eaa8eab58ce93f77cb6803d8ec46e09313de658"`
[INFO] [stdout] 6f4908062930ba10cf26975b7eaa8eab58ce93f77cb6803d8ec46e09313de658