[INFO] fetching crate piccolo 0.3.3...
[INFO] testing piccolo-0.3.3 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate piccolo 0.3.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate piccolo 0.3.3
[INFO] finished tweaking crates.io crate piccolo 0.3.3
[INFO] tweaked toml for crates.io crate piccolo 0.3.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate piccolo 0.3.3 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate piccolo 0.3.3 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d115094a938194233d39ab84e0366018a250e16153adaeb24a623fbb13a38b1
[INFO] running `Command { std: "docker" "start" "-a" "0d115094a938194233d39ab84e0366018a250e16153adaeb24a623fbb13a38b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d115094a938194233d39ab84e0366018a250e16153adaeb24a623fbb13a38b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d115094a938194233d39ab84e0366018a250e16153adaeb24a623fbb13a38b1", kill_on_drop: false }`
[INFO] [stdout] 0d115094a938194233d39ab84e0366018a250e16153adaeb24a623fbb13a38b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa4e282108004e59d4e822eed3d3106c05c4357ea287d0cde1c2c01499150907
[INFO] running `Command { std: "docker" "start" "-a" "aa4e282108004e59d4e822eed3d3106c05c4357ea287d0cde1c2c01499150907", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]    Compiling allocator-api2 v0.2.18
[INFO] [stderr]    Compiling sptr v0.3.2
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling synstructure v0.13.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]    Compiling gc-arena-derive v0.5.3
[INFO] [stderr]    Compiling gc-arena v0.5.3
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]    Compiling piccolo v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/conversion.rs:221:28
[INFO] [stdout]     |
[INFO] [stdout] 221 |                         if let Ok(i) = <$i>::try_from(i) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 240 | impl_int_from!(i64, u64, i32, u32, i16, u16, i8, u8);
[INFO] [stdout]     | ---------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_int_from` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/stack.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         &mut self,
[INFO] [stdout]    |         ^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 79 |         range: R,
[INFO] [stdout] 80 |     ) -> vec::Drain<Value<'gc>, MetricsAlloc<'gc>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 80 |     ) -> vec::Drain<'_, Value<'gc>, MetricsAlloc<'gc>> {
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]   --> src/string.rs:55:65
[INFO] [stdout]    |
[INFO] [stdout] 55 |                         self.metrics.mark_external_deallocation((*ptr).len());
[INFO] [stdout]    |                                                                 ^^---^^^^^^^
[INFO] [stdout]    |                                                                   |
[INFO] [stdout]    |                                                                   this raw pointer has type `*const [u8]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[u8]`
[INFO] [stdout]   --> src/string.rs:55:65
[INFO] [stdout]    |
[INFO] [stdout] 55 |                         self.metrics.mark_external_deallocation((*ptr).len());
[INFO] [stdout]    |                                                                 ^^^^^^
[INFO] [stdout] note: method calls to `len` require a reference
[INFO] [stdout]   --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/core/src/slice/mod.rs:114:4
[INFO] [stdout]    = note: `#[deny(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]    |
[INFO] [stdout] 55 |                         self.metrics.mark_external_deallocation((&(*ptr)).len());
[INFO] [stdout]    |                                                                 ++      +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/thread/thread.rs:206:9
[INFO] [stdout]     |
[INFO] [stdout] 206 |         &self,
[INFO] [stdout]     |         ^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 209 |     ) -> Result<RefMut<ThreadState<'gc>>, BadThreadMode> {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 209 |     ) -> Result<RefMut<'_, ThreadState<'gc>>, BadThreadMode> {
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piccolo` (lib) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "aa4e282108004e59d4e822eed3d3106c05c4357ea287d0cde1c2c01499150907", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa4e282108004e59d4e822eed3d3106c05c4357ea287d0cde1c2c01499150907", kill_on_drop: false }`
[INFO] [stdout] aa4e282108004e59d4e822eed3d3106c05c4357ea287d0cde1c2c01499150907
