[INFO] updating cached repository https://github.com/ThatsGobbles/taggu-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5a400888540da38362bbec2a1a450916aea5024d
[INFO] checking ThatsGobbles/taggu-rust against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ftaggu-rust" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThatsGobbles/taggu-rust on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ThatsGobbles/taggu-rust
[INFO] finished tweaking git repo https://github.com/ThatsGobbles/taggu-rust
[INFO] tweaked toml for git repo https://github.com/ThatsGobbles/taggu-rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ThatsGobbles/taggu-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=allow" "-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" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 55d4b72553c60c184a526ca82c83ee97ff9c6fd9b8e961f93687fad037314379
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "55d4b72553c60c184a526ca82c83ee97ff9c6fd9b8e961f93687fad037314379"`
[INFO] [stderr]     Checking maplit v1.0.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking backtrace v0.3.4
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]     Checking taggu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(generators, generator_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(type_ascription)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(entry_or_default)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0720]: opaque type expands to a recursive type
[INFO] [stderr]    --> src/metadata/mod.rs:149:63
[INFO] [stderr]     |
[INFO] [stderr] 149 |     pub fn iter_over<'a>(&'a self, mis: MappingIterScheme) -> impl Iterator<Item = &'a String> {
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expands to a recursive type
[INFO] [stderr]     |
[INFO] [stderr]     = note: expanded type is `generator::GenConverter::gen_to_iter::It<[generator@src/metadata/mod.rs:150:23: 184:10 self:&'a metadata::MetaValue, mis:metadata::MappingIterScheme for<'r, 's, 't0, 't1, 't2, 't3, 't4, 't5, 't6, 't7, 't8, 't9, 't10, 't11, 't12, 't13, 't14, 't15, 't16, 't17, 't18, 't19, 't20, 't21, 't22, 't23, 't24, 't25, 't26, 't27, 't28, 't29, 't30, 't31, 't32, 't33, 't34, 't35, 't36, 't37, 't38, 't39, 't40, 't41, 't42, 't43, 't44, 't45, 't46, 't47, 't48, 't49, 't50, 't51, 't52> {&'r metadata::MetaValue, metadata::MetaValue, &'s std::string::String, &'t0 std::string::String, (), &'t1 std::vec::Vec<metadata::MetaValue>, fn(&'t2 std::vec::Vec<metadata::MetaValue>) -> <&'t2 std::vec::Vec<metadata::MetaValue> as std::iter::IntoIterator>::IntoIter {<&'t2 std::vec::Vec<metadata::MetaValue> as std::iter::IntoIterator>::into_iter}, &'t3 std::vec::Vec<metadata::MetaValue>, std::slice::Iter<'t4, metadata::MetaValue>, std::slice::Iter<'t5, metadata::MetaValue>, &'t6 metadata::MetaValue, &'t7 metadata::MetaValue, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t10 metadata::MetaValue, &'t11 metadata::MetaValue, metadata::MappingIterScheme, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t16 std::string::String, &'t17 std::string::String, &'t18 std::string::String, &'t19 std::string::String, (), &'t20 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>, fn(&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>) -> <&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue> as std::iter::IntoIterator>::IntoIter {<&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue> as std::iter::IntoIterator>::into_iter}, &'t22 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>, std::collections::btree_map::Iter<'t23, metadata::MetaKey, metadata::MetaValue>, std::collections::btree_map::Iter<'t24, metadata::MetaKey, metadata::MetaValue>, (&'t25 metadata::MetaKey, &'t26 metadata::MetaValue), &'t27 metadata::MetaKey, &'t28 metadata::MetaValue, metadata::MappingIterScheme, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t31 metadata::MetaKey, &'t32 metadata::MetaKey, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t37 std::string::String, &'t38 std::string::String, &'t39 std::string::String, &'t40 std::string::String, (), metadata::MappingIterScheme, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t43 metadata::MetaValue, &'t44 metadata::MetaValue, metadata::MappingIterScheme, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t49 std::string::String, &'t50 std::string::String, &'t51 std::string::String, &'t52 std::string::String, ()}]>`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(generators, generator_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(type_ascription)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(entry_or_default)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `G` in the current scope
[INFO] [stderr]   --> src/generator.rs:15:34
[INFO] [stderr]    |
[INFO] [stderr] 15 |                     match self.0.resume() {
[INFO] [stderr]    |                                  ^^^^^^ method not found in `G`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the type parameter is bounded by the trait
[INFO] [stderr] help: the following trait defines an item `resume`, perhaps you need to restrict type parameter `G` with it:
[INFO] [stderr]    |
[INFO] [stderr] 10 |         impl<G: std::ops::Generator + Generator<Return = ()>> Iterator for It<G> {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599, E0720.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `taggu`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0720]: opaque type expands to a recursive type
[INFO] [stderr]    --> src/metadata/mod.rs:149:63
[INFO] [stderr]     |
[INFO] [stderr] 149 |     pub fn iter_over<'a>(&'a self, mis: MappingIterScheme) -> impl Iterator<Item = &'a String> {
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expands to a recursive type
[INFO] [stderr]     |
[INFO] [stderr]     = note: expanded type is `generator::GenConverter::gen_to_iter::It<[generator@src/metadata/mod.rs:150:23: 184:10 self:&'a metadata::MetaValue, mis:metadata::MappingIterScheme for<'r, 's, 't0, 't1, 't2, 't3, 't4, 't5, 't6, 't7, 't8, 't9, 't10, 't11, 't12, 't13, 't14, 't15, 't16, 't17, 't18, 't19, 't20, 't21, 't22, 't23, 't24, 't25, 't26, 't27, 't28, 't29, 't30, 't31, 't32, 't33, 't34, 't35, 't36, 't37, 't38, 't39, 't40, 't41, 't42, 't43, 't44, 't45, 't46, 't47, 't48, 't49, 't50, 't51, 't52> {&'r metadata::MetaValue, metadata::MetaValue, &'s std::string::String, &'t0 std::string::String, (), &'t1 std::vec::Vec<metadata::MetaValue>, fn(&'t2 std::vec::Vec<metadata::MetaValue>) -> <&'t2 std::vec::Vec<metadata::MetaValue> as std::iter::IntoIterator>::IntoIter {<&'t2 std::vec::Vec<metadata::MetaValue> as std::iter::IntoIterator>::into_iter}, &'t3 std::vec::Vec<metadata::MetaValue>, std::slice::Iter<'t4, metadata::MetaValue>, std::slice::Iter<'t5, metadata::MetaValue>, &'t6 metadata::MetaValue, &'t7 metadata::MetaValue, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t10 metadata::MetaValue, &'t11 metadata::MetaValue, metadata::MappingIterScheme, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t16 std::string::String, &'t17 std::string::String, &'t18 std::string::String, &'t19 std::string::String, (), &'t20 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>, fn(&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>) -> <&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue> as std::iter::IntoIterator>::IntoIter {<&'t21 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue> as std::iter::IntoIterator>::into_iter}, &'t22 std::collections::BTreeMap<metadata::MetaKey, metadata::MetaValue>, std::collections::btree_map::Iter<'t23, metadata::MetaKey, metadata::MetaValue>, std::collections::btree_map::Iter<'t24, metadata::MetaKey, metadata::MetaValue>, (&'t25 metadata::MetaKey, &'t26 metadata::MetaValue), &'t27 metadata::MetaKey, &'t28 metadata::MetaValue, metadata::MappingIterScheme, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t31 metadata::MetaKey, &'t32 metadata::MetaKey, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t37 std::string::String, &'t38 std::string::String, &'t39 std::string::String, &'t40 std::string::String, (), metadata::MappingIterScheme, fn(std::boxed::Box<impl std::iter::Iterator>) -> <std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::IntoIter {<std::boxed::Box<impl std::iter::Iterator> as std::iter::IntoIterator>::into_iter}, fn(impl std::iter::Iterator) -> std::boxed::Box<impl std::iter::Iterator> {std::boxed::Box::<impl std::iter::Iterator>::new}, &'t43 metadata::MetaValue, &'t44 metadata::MetaValue, metadata::MappingIterScheme, impl std::iter::Iterator, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, std::boxed::Box<impl std::iter::Iterator>, &'t49 std::string::String, &'t50 std::string::String, &'t51 std::string::String, &'t52 std::string::String, ()}]>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `resume` found for type `G` in the current scope
[INFO] [stderr]   --> src/generator.rs:15:34
[INFO] [stderr]    |
[INFO] [stderr] 15 |                     match self.0.resume() {
[INFO] [stderr]    |                                  ^^^^^^ method not found in `G`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the type parameter is bounded by the trait
[INFO] [stderr] help: the following trait defines an item `resume`, perhaps you need to restrict type parameter `G` with it:
[INFO] [stderr]    |
[INFO] [stderr] 10 |         impl<G: std::ops::Generator + Generator<Return = ()>> Iterator for It<G> {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599, E0720.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `taggu`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "55d4b72553c60c184a526ca82c83ee97ff9c6fd9b8e961f93687fad037314379"`
[INFO] running `"docker" "rm" "-f" "55d4b72553c60c184a526ca82c83ee97ff9c6fd9b8e961f93687fad037314379"`
[INFO] [stdout] 55d4b72553c60c184a526ca82c83ee97ff9c6fd9b8e961f93687fad037314379