[INFO] cloning repository https://github.com/ChangeCaps/rumble
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ChangeCaps/rumble" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChangeCaps%2Frumble", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChangeCaps%2Frumble'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 428cab4b52825aa7b5fdafe14c8cc59d58c1a85f
[INFO] checking ChangeCaps/rumble against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChangeCaps%2Frumble" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ChangeCaps/rumble on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ChangeCaps/rumble
[INFO] finished tweaking git repo https://github.com/ChangeCaps/rumble
[INFO] tweaked toml for git repo https://github.com/ChangeCaps/rumble written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ChangeCaps/rumble already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8ab4760da6a6c285ee8b1be91be7bedfe1e4dc0ca74277f90d60751134d53c0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a8ab4760da6a6c285ee8b1be91be7bedfe1e4dc0ca74277f90d60751134d53c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8ab4760da6a6c285ee8b1be91be7bedfe1e4dc0ca74277f90d60751134d53c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8ab4760da6a6c285ee8b1be91be7bedfe1e4dc0ca74277f90d60751134d53c0", kill_on_drop: false }`
[INFO] [stdout] a8ab4760da6a6c285ee8b1be91be7bedfe1e4dc0ca74277f90d60751134d53c0
[INFO] running `Command { std: "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=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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcc294b0eccba4d59c9f26de5b33446db391616309665b5c41227b73202e7148
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dcc294b0eccba4d59c9f26de5b33446db391616309665b5c41227b73202e7148", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.5
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling cairo-rs v0.8.1
[INFO] [stderr]     Checking tinystr v0.3.2
[INFO] [stderr]    Compiling gio v0.8.1
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling pango v0.8.0
[INFO] [stderr]    Compiling gdk-pixbuf v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling gdk v0.12.1
[INFO] [stderr]    Compiling atk v0.8.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling gtk v0.8.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking bytemuck v1.2.0
[INFO] [stderr]     Checking instant v0.1.4
[INFO] [stderr]     Checking fluent-syntax v0.9.3
[INFO] [stderr]    Compiling cpal v0.11.0
[INFO] [stderr]    Compiling glib-sys v0.9.1
[INFO] [stderr]    Compiling gobject-sys v0.9.1
[INFO] [stderr]    Compiling gio-sys v0.9.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.9.2
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.9.1
[INFO] [stderr]    Compiling pango-sys v0.9.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling gdk-sys v0.9.1
[INFO] [stderr]    Compiling atk-sys v0.9.1
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling gtk-sys v0.9.2
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling standback v0.2.9
[INFO] [stderr]    Compiling time v0.2.16
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking kurbo v0.6.1
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking num-traits v0.2.12
[INFO] [stderr]     Checking deflate v0.8.4
[INFO] [stderr]     Checking type-map v0.3.0
[INFO] [stderr]     Checking unic-langid v0.9.0
[INFO] [stderr]     Checking simple_logger v1.6.0
[INFO] [stderr]     Checking fluent-langneg v0.13.0
[INFO] [stderr]     Checking intl_pluralrules v7.0.0
[INFO] [stderr]     Checking intl-memoizer v0.5.0
[INFO] [stderr]     Checking tiff v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking png v0.16.4
[INFO] [stderr]     Checking piet v0.1.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.19
[INFO] [stderr]     Checking image v0.23.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.20
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling druid-derive v0.3.1
[INFO] [stderr]     Checking time-macros v0.1.0
[INFO] [stderr]     Checking thiserror v1.0.19
[INFO] [stderr]     Checking pin-project v0.4.20
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking glib v0.9.3
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rental-0.5.5/src/lib.rs:93:12
[INFO] [stdout]     |
[INFO] [stdout] 93  |         #[derive(__rental_traits)]
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     define_rental_traits!(32);
[INFO] [stdout]     |     -------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: message: expected prefix "#[allow(unused)]" not found in "# [allow(unused)] enum ProceduralMasqueradeDummyType\n{ Input = (0, stringify ! (32)) . 0, }"
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rental-0.5.5/src/lib.rs:257:13
[INFO] [stdout]     |
[INFO] [stdout] 257 |               #[derive(__rental_structs_and_impls)]
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 285 | / rental! {
[INFO] [stdout] 286 | |     /// Example types that demonstrate the API generated by the rental macro.
[INFO] [stdout] 287 | |     pub mod examples {
[INFO] [stdout] 288 | |         use std::sync;
[INFO] [stdout] ...   |
[INFO] [stdout] 345 | |     }
[INFO] [stdout] 346 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: message: expected prefix "#[allow(unused)]" not found in "# [allow(unused)] enum ProceduralMasqueradeDummyType\n{\n    Input =\n    (0, stringify !\n     (use std :: sync ; #\n      [doc =\n       r\" The simplest shared rental. The head is a boxed integer, and the suffix is a ref to that integer. This struct demonstrates the basic API that all shared rental structs have. See [`SimpleMut`](struct.SimpleMut.html) for the mutable analog.\"]\n      # [rental] pub struct SimpleRef\n      { head : Box < i32 >, iref : & \'head i32, } #\n      [doc =\n       r\" The simplest mutable rental. Mutable rentals have a slightly different API; compare this struct to [`SimpleRef`](struct.SimpleRef.html) for the clearest picture of how they differ.\"]\n      # [rental_mut] pub struct SimpleMut\n      { head : Box < i32 >, iref : & \'head mut i32, } #\n      [doc =\n       r\" Identical to [`SimpleRef`](struct.SimpleRef.html), but with the `debug` flag enabled. This will provide a `Debug` impl for the struct as long as all of the fields are `Debug`.\"]\n      # [rental(debug)] pub struct SimpleRefDebug\n      { head : Box < i32 >, iref : & \'head i32, } #\n      [doc =\n       r\" Similar to [`SimpleRef`](struct.SimpleRef.html), but with the `clone` flag enabled. This will provide a `Clone` impl for the struct as long as the prefix fields are `CloneStableDeref` and the suffix is `Clone` . Notice that the head is an `Arc`, since a clone of an `Arc` will deref to the same object as the original.\"]\n      # [rental(clone)] pub struct SimpleRefClone\n      { head : sync :: Arc < i32 >, iref : & \'head i32, } #\n      [doc =\n       r\" Identical to [`SimpleRef`](struct.SimpleRef.html), but with the `deref_suffix` flag enabled. This will provide a `Deref` impl for the struct, which will in turn deref the suffix. Notice that this flag also removes the `self` param from all methods, replacing it with an explicit param. This prevents any rental methods from blocking deref.\"]\n      # [rental(deref_suffix)] pub struct SimpleRefDeref\n      { head : Box < i32 >, iref : & \'head i32, } #\n      [doc =\n       r\" Identical to [`SimpleMut`](struct.SimpleMut.html), but with the `deref_mut_suffix` flag enabled. This will provide a `DerefMut` impl for the struct, which will in turn deref the suffix.Notice that this flag also removes the `self` param from all methods, replacing it with an explicit param. This prevents any rental methods from blocking deref.\"]\n      # [rental_mut(deref_mut_suffix)] pub struct SimpleMutDeref\n      { head : Box < i32 >, iref : & \'head mut i32, } #\n      [doc =\n       r\" Identical to [`SimpleRef`](struct.SimpleRef.html), but with the `covariant` flag enabled. For rental structs where the field types have covariant lifetimes, this will allow you to directly borrow the fields, as they can be safely reborrowed to a shorter lifetime. See the [`all`](struct.SimpleRefCovariant.html#method.all) and [`suffix`](struct.SimpleRefCovariant.html#method.suffix) methods.\"]\n      # [rental(covariant)] pub struct SimpleRefCovariant\n      { head : Box < i32 >, iref : & \'head i32, } #\n      [doc =\n       r\" Identical to [`SimpleRef`](struct.SimpleRef.html), but with the `map_suffix` flag enabled. This will allow the type of the suffix to be changed by mapping it to another instantiation of the same struct with the different type param. See the [`map`](struct.SimpleRefMap.html#method.map), [`try_map`](struct.SimpleRefMap.html#method.try_map), and [`try_map_or_drop`](struct.SimpleRefMap.html#method.try_map_or_drop) methods.\"]\n      # [rental(map_suffix = \"T\")] pub struct SimpleRefMap < T : \'static >\n      { head : Box < i32 >, iref : & \'head T, })) . 0\n}"
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rental-0.5.5/src/lib.rs:257:13
[INFO] [stdout]     |
[INFO] [stdout] 257 |               #[derive(__rental_structs_and_impls)]
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 350 | / rental! {
[INFO] [stdout] 351 | |     /// Premade types for the most common use cases.
[INFO] [stdout] 352 | |     pub mod common {
[INFO] [stdout] 353 | |         use std::ops::DerefMut;
[INFO] [stdout] ...   |
[INFO] [stdout] 484 | |     }
[INFO] [stdout] 485 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: message: expected prefix "#[allow(unused)]" not found in "# [allow(unused)] enum ProceduralMasqueradeDummyType\n{\n    Input =\n    (0, stringify !\n     (use std :: ops :: DerefMut ; use stable_deref_trait :: StableDeref ; use\n      std :: cell ; use std :: sync ; #\n      [doc = r\" Stores an owner and a shared reference in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentRef;\"] # [doc = r\" # fn main() {\"] #\n      [doc = r\" let r = RentRef::new(Box::new(5), |i| &*i);\"] #\n      [doc = r\" assert_eq!(*r, RentRef::rent(&r, |iref| **iref));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental(debug, clone, deref_suffix, covariant, map_suffix = \"T\")] pub\n      struct RentRef < H : \'static + StableDeref, T : \'static >\n      { head : H, suffix : & \'head T, } #\n      [doc = r\" Stores an owner and a mutable reference in the same struct.\"]\n      # [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"]\n      # [doc = r\" # use rental::common::RentMut;\"] # [doc = r\" # fn main() {\"]\n      # [doc = r\" let mut r = RentMut::new(Box::new(5), |i| &mut *i);\"] #\n      [doc = r\" *r = 12;\"] #\n      [doc = r\" assert_eq!(12, RentMut::rent(&mut r, |iref| **iref));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental_mut(debug, deref_mut_suffix, covariant, map_suffix = \"T\")] pub\n      struct RentMut < H : \'static + StableDeref + DerefMut, T : \'static >\n      { head : H, suffix : & \'head mut T, } #\n      [doc = r\" Stores a `RefCell` and a `Ref` in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentRefCell;\"] #\n      [doc = r\" # fn main() {\"] # [doc = r\" use std::cell;\"] # [doc = r\"\"] #\n      [doc =\n       r\" let r = RentRefCell::new(Box::new(cell::RefCell::new(5)), |c| c.borrow());\"]\n      # [doc = r\" assert_eq!(*r, RentRefCell::rent(&r, |c| **c));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental(debug, clone, deref_suffix, covariant, map_suffix = \"T\")] pub\n      struct RentRefCell < H : \'static + StableDeref, T : \'static >\n      { head : H, suffix : cell :: Ref < \'head, T >, } #\n      [doc = r\" Stores a `RefCell` and a `RefMut` in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentRefCellMut;\"] #\n      [doc = r\" # fn main() {\"] # [doc = r\" use std::cell;\"] # [doc = r\"\"] #\n      [doc =\n       r\" let mut r = RentRefCellMut::new(Box::new(cell::RefCell::new(5)), |c| c.borrow_mut());\"]\n      # [doc = r\" *r = 12;\"] #\n      [doc = r\" assert_eq!(12, RentRefCellMut::rent(&r, |c| **c));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental_mut(debug, deref_mut_suffix, covariant, map_suffix = \"T\")] pub\n      struct RentRefCellMut < H : \'static + StableDeref + DerefMut, T :\n      \'static > { head : H, suffix : cell :: RefMut < \'head, T >, } #\n      [doc = r\" Stores a `Mutex` and a `MutexGuard` in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentMutex;\"] # [doc = r\" # fn main() {\"]\n      # [doc = r\" use std::sync;\"] # [doc = r\"\"] #\n      [doc =\n       r\" let mut r = RentMutex::new(Box::new(sync::Mutex::new(5)), |c| c.lock().unwrap());\"]\n      # [doc = r\" *r = 12;\"] #\n      [doc = r\" assert_eq!(12, RentMutex::rent(&r, |c| **c));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental(debug, clone, deref_mut_suffix, covariant, map_suffix = \"T\")]\n      pub struct RentMutex < H : \'static + StableDeref + DerefMut, T : \'static\n      > { head : H, suffix : sync :: MutexGuard < \'head, T >, } #\n      [doc =\n       r\" Stores an `RwLock` and an `RwLockReadGuard` in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentRwLock;\"] #\n      [doc = r\" # fn main() {\"] # [doc = r\" use std::sync;\"] # [doc = r\"\"] #\n      [doc =\n       r\" let r = RentRwLock::new(Box::new(sync::RwLock::new(5)), |c| c.read().unwrap());\"]\n      # [doc = r\" assert_eq!(*r, RentRwLock::rent(&r, |c| **c));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental(debug, clone, deref_suffix, covariant, map_suffix = \"T\")] pub\n      struct RentRwLock < H : \'static + StableDeref, T : \'static >\n      { head : H, suffix : sync :: RwLockReadGuard < \'head, T >, } #\n      [doc =\n       r\" Stores an `RwLock` and an `RwLockWriteGuard` in the same struct.\"] #\n      [doc = r\"\"] # [doc = r\" ```rust\"] # [doc = r\" # extern crate rental;\"] #\n      [doc = r\" # use rental::common::RentRwLockMut;\"] #\n      [doc = r\" # fn main() {\"] # [doc = r\" use std::sync;\"] # [doc = r\"\"] #\n      [doc =\n       r\" let mut r = RentRwLockMut::new(Box::new(sync::RwLock::new(5)), |c| c.write().unwrap());\"]\n      # [doc = r\" *r = 12;\"] #\n      [doc = r\" assert_eq!(12, RentRwLockMut::rent(&r, |c| **c));\"] #\n      [doc = r\" # }\"] # [doc = r\" ```\"] #\n      [rental(debug, clone, deref_mut_suffix, covariant, map_suffix = \"T\")]\n      pub struct RentRwLockMut < H : \'static + StableDeref, T : \'static >\n      { head : H, suffix : sync :: RwLockWriteGuard < \'head, T >, })) . 0\n}"
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rental`.
[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 `Command { std: "docker" "inspect" "dcc294b0eccba4d59c9f26de5b33446db391616309665b5c41227b73202e7148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc294b0eccba4d59c9f26de5b33446db391616309665b5c41227b73202e7148", kill_on_drop: false }`
[INFO] [stdout] dcc294b0eccba4d59c9f26de5b33446db391616309665b5c41227b73202e7148