[INFO] fetching crate rivia 0.2.10...
[INFO] checking rivia-0.2.10 against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] extracting crate rivia 0.2.10 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate rivia 0.2.10
[INFO] finished tweaking crates.io crate rivia 0.2.10
[INFO] tweaked toml for crates.io crate rivia 0.2.10 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rivia 0.2.10 on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rivia 0.2.10 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded autocfg v1.3.0
[INFO] [stderr]   Downloaded either v1.12.0
[INFO] [stderr]   Downloaded nix v0.23.2
[INFO] [stderr]   Downloaded cc v1.0.98
[INFO] [stderr]   Downloaded libc v0.2.155
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc9e105c4dee58b4fd998ac561948776f0e3da6e28f9a1ac538f1d0ff548816b
[INFO] running `Command { std: "docker" "start" "-a" "dc9e105c4dee58b4fd998ac561948776f0e3da6e28f9a1ac538f1d0ff548816b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc9e105c4dee58b4fd998ac561948776f0e3da6e28f9a1ac538f1d0ff548816b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc9e105c4dee58b4fd998ac561948776f0e3da6e28f9a1ac538f1d0ff548816b", kill_on_drop: false }`
[INFO] [stdout] dc9e105c4dee58b4fd998ac561948776f0e3da6e28f9a1ac538f1d0ff548816b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d80fb1289948a208cc7f837d74592a70b1db19fab59cb028b2977266d277ae4
[INFO] running `Command { std: "docker" "start" "-a" "8d80fb1289948a208cc7f837d74592a70b1db19fab59cb028b2977266d277ae4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking either v1.12.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking nix v0.23.2
[INFO] [stderr]     Checking rivia v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `trying`
[INFO] [stdout]  --> src/sys/fs/entries.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     trying,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `trying`
[INFO] [stdout]   --> src/sys/fs/stdfs/entry.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     trying,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:175:17
[INFO] [stdout]     |
[INFO] [stdout] 175 |         if path.is_empty() {
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `sys::fs::path::PathExt::is_empty(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(path_is_empty)]` to the crate attributes to enable `Path::is_empty`
[INFO] [stdout]    --> src/lib.rs:61:1
[INFO] [stdout]     |
[INFO] [stdout]  61 + #![feature(path_is_empty)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:152:30
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub(crate) fn read_guard(&self) -> MemfsGuard {
[INFO] [stdout]     |                              ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub(crate) fn read_guard(&self) -> MemfsGuard<'_> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:157:31
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub(crate) fn write_guard(&self) -> MemfsGuard {
[INFO] [stdout]     |                               ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub(crate) fn write_guard(&self) -> MemfsGuard<'_> {
[INFO] [stdout]     |                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `trying`
[INFO] [stdout]  --> src/sys/fs/entries.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     trying,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `trying`
[INFO] [stdout]   --> src/sys/fs/stdfs/entry.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     trying,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/core/string.rs:202:26
[INFO] [stdout]     |
[INFO] [stdout] 202 |         assert_eq!("foo".trim_suffix("boo"), "foo"); // no change
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `core::string::StringExt::trim_suffix(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(trim_prefix_suffix)]` to the crate attributes to enable `core::str::<impl str>::trim_suffix`
[INFO] [stdout]    --> src/lib.rs:61:1
[INFO] [stdout]     |
[INFO] [stdout]  61 + #![feature(trim_prefix_suffix)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/core/string.rs:203:26
[INFO] [stdout]     |
[INFO] [stdout] 203 |         assert_eq!("foo".trim_suffix("oo"), "f");
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `core::string::StringExt::trim_suffix(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(trim_prefix_suffix)]` to the crate attributes to enable `core::str::<impl str>::trim_suffix`
[INFO] [stdout]    --> src/lib.rs:61:1
[INFO] [stdout]     |
[INFO] [stdout]  61 + #![feature(trim_prefix_suffix)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/core/string.rs:204:26
[INFO] [stdout]     |
[INFO] [stdout] 204 |         assert_eq!("ƒoo".trim_suffix("o"), "ƒo"); // fancy f!
[INFO] [stdout]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `core::string::StringExt::trim_suffix(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(trim_prefix_suffix)]` to the crate attributes to enable `core::str::<impl str>::trim_suffix`
[INFO] [stdout]    --> src/lib.rs:61:1
[INFO] [stdout]     |
[INFO] [stdout]  61 + #![feature(trim_prefix_suffix)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:175:17
[INFO] [stdout]     |
[INFO] [stdout] 175 |         if path.is_empty() {
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `sys::fs::path::PathExt::is_empty(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(path_is_empty)]` to the crate attributes to enable `std::path::Path::is_empty`
[INFO] [stdout]    --> src/lib.rs:61:1
[INFO] [stdout]     |
[INFO] [stdout]  61 + #![feature(path_is_empty)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/sys/fs/path.rs:1255:35
[INFO] [stdout]      |
[INFO] [stdout] 1255 |         assert_eq!(Path::new("/").is_empty(), false);
[INFO] [stdout]      |                                   ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `sys::fs::path::PathExt::is_empty(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(path_is_empty)]` to the crate attributes to enable `std::path::Path::is_empty`
[INFO] [stdout]     -->  src/lib.rs:61:1
[INFO] [stdout]      |
[INFO] [stdout]   61 + #![feature(path_is_empty)]
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/sys/fs/path.rs:1256:34
[INFO] [stdout]      |
[INFO] [stdout] 1256 |         assert_eq!(Path::new("").is_empty(), true);
[INFO] [stdout]      |                                  ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `sys::fs::path::PathExt::is_empty(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(path_is_empty)]` to the crate attributes to enable `std::path::Path::is_empty`
[INFO] [stdout]     -->  src/lib.rs:61:1
[INFO] [stdout]      |
[INFO] [stdout]   61 + #![feature(path_is_empty)]
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]     --> src/sys/fs/path.rs:1257:38
[INFO] [stdout]      |
[INFO] [stdout] 1257 |         assert_eq!(PathBuf::from("").is_empty(), true);
[INFO] [stdout]      |                                      ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]      = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]      = help: call with fully qualified syntax `sys::fs::path::PathExt::is_empty(...)` to keep using the current method
[INFO] [stdout] help: add `#![feature(path_is_empty)]` to the crate attributes to enable `std::path::Path::is_empty`
[INFO] [stdout]     -->  src/lib.rs:61:1
[INFO] [stdout]      |
[INFO] [stdout]   61 + #![feature(path_is_empty)]
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:152:30
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub(crate) fn read_guard(&self) -> MemfsGuard {
[INFO] [stdout]     |                              ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 152 |     pub(crate) fn read_guard(&self) -> MemfsGuard<'_> {
[INFO] [stdout]     |                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/sys/fs/memfs/vfs.rs:157:31
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub(crate) fn write_guard(&self) -> MemfsGuard {
[INFO] [stdout]     |                               ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub(crate) fn write_guard(&self) -> MemfsGuard<'_> {
[INFO] [stdout]     |                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.31s
[INFO] running `Command { std: "docker" "inspect" "8d80fb1289948a208cc7f837d74592a70b1db19fab59cb028b2977266d277ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d80fb1289948a208cc7f837d74592a70b1db19fab59cb028b2977266d277ae4", kill_on_drop: false }`
[INFO] [stdout] 8d80fb1289948a208cc7f837d74592a70b1db19fab59cb028b2977266d277ae4
