[INFO] cloning repository https://github.com/Avi-D-coder/gc-generic-std
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Avi-D-coder/gc-generic-std" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvi-D-coder%2Fgc-generic-std", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvi-D-coder%2Fgc-generic-std'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0a094a47d2a4e57efcf9b222d91bbda431475f4
[INFO] checking Avi-D-coder/gc-generic-std against try#ddcf048784667508cd676fef4667f88ae15628a3 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvi-D-coder%2Fgc-generic-std" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Avi-D-coder/gc-generic-std
[INFO] finished tweaking git repo https://github.com/Avi-D-coder/gc-generic-std
[INFO] tweaked toml for git repo https://github.com/Avi-D-coder/gc-generic-std written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Avi-D-coder/gc-generic-std on toolchain ddcf048784667508cd676fef4667f88ae15628a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Avi-D-coder/gc-generic-std 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" "+ddcf048784667508cd676fef4667f88ae15628a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3f10a4aaf2808f5d47d0a762e67551e84d04ca252c3e7f3287b5947e64c2f62
[INFO] running `Command { std: "docker" "start" "-a" "e3f10a4aaf2808f5d47d0a762e67551e84d04ca252c3e7f3287b5947e64c2f62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3f10a4aaf2808f5d47d0a762e67551e84d04ca252c3e7f3287b5947e64c2f62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f10a4aaf2808f5d47d0a762e67551e84d04ca252c3e7f3287b5947e64c2f62", kill_on_drop: false }`
[INFO] [stdout] e3f10a4aaf2808f5d47d0a762e67551e84d04ca252c3e7f3287b5947e64c2f62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94fb94186d7270f5833ebaaedb81d1e92f6d965fa6d5009b4dc27f9f1162e4b6
[INFO] running `Command { std: "docker" "start" "-a" "94fb94186d7270f5833ebaaedb81d1e92f6d965fa6d5009b4dc27f9f1162e4b6", kill_on_drop: false }`
[INFO] [stderr]     Checking generic-std v0.1.0
[INFO] [stderr]     Checking gc-generic-std v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(optin_builtin_traits)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in 1.50.0; see <https://github.com/rust-lang/rust/pull/79336> for more information
[INFO] [stdout]   = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 137 |     pub unsafe auto trait NoGc {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:155:5
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub unsafe auto trait Immutable {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 163 |     pub auto trait NotDerived {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(optin_builtin_traits)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in 1.50.0; see <https://github.com/rust-lang/rust/pull/79336> for more information
[INFO] [stdout]   = note: renamed to `auto_traits`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 137 |     pub unsafe auto trait NoGc {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:155:5
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub unsafe auto trait Immutable {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy
[INFO] [stdout]    --> src/main.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 163 |     pub auto trait NotDerived {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
[INFO] [stdout]     = help: add `#![feature(auto_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-29; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0367]: `!Immutable` impl requires `T: Sized` but the struct it is implemented for does not
[INFO] [stdout]    --> src/main.rs:158:10
[INFO] [stdout]     |
[INFO] [stdout] 158 |     impl<T> !Immutable for UnsafeCell<T> {}
[INFO] [stdout]     |          ^
[INFO] [stdout]     |
[INFO] [stdout] note: the implementor must specify the same requirement
[INFO] [stdout]    --> /rustc/ddcf048784667508cd676fef4667f88ae15628a3/library/core/src/cell.rs:2289:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:34:14
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn a<'a>(t: <String as UnPlugLife>::T) {}
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:35:14
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn b<'a>(t: <usize as UnPlugLife>::T) {}
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn c<'a, T: UnPlugLife>(t: <Gc<'a, T> as UnPlugLife>::T) {}
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]    --> src/main.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |             arena: &'a Arena<Self>,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next`
[INFO] [stdout]    --> src/main.rs:198:13
[INFO] [stdout]     |
[INFO] [stdout] 198 |             next: impl TyEq<ListL<T>>,
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/main.rs:199:13
[INFO] [stdout]     |
[INFO] [stdout] 199 |             value: impl TyEq<T>,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |             let e = todo!();
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next`
[INFO] [stdout]    --> src/main.rs:233:27
[INFO] [stdout]     |
[INFO] [stdout] 233 |                 Gc(Elem { next, value: v }) => {
[INFO] [stdout]     |                           ^^^^ help: try ignoring the field: `next: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/main.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 243 | /         pub fn insert<'r, 'a: 'r>(
[INFO] [stdout] 244 | |             self,
[INFO] [stdout] 245 | |             index: usize,
[INFO] [stdout] 246 | |             arena: &'a Arena<ElemL<Of<T>>>,
[INFO] [stdout] 247 | |         ) -> List<'r, Ty<'r, T>> {
[INFO] [stdout]     | |________________________________^ cannot return without recursing
[INFO] [stdout] 248 |               let Gc(Elem { value, next }) = self.0.unwrap();
[INFO] [stdout] 249 |               let next = next.insert(index - 1, arena);
[INFO] [stdout]     |                          ----------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:356:45
[INFO] [stdout]     |
[INFO] [stdout] 356 |         fn bad1<'a, 'b, T: Eq + UnPlugLife>(a: Gc<'a, Gc<'a, T>>, b: Ty<'b, Gc<Gc<T>>>) -> bool {
[INFO] [stdout]     |                                             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:357:17
[INFO] [stdout]     |
[INFO] [stdout] 357 |             let t: Gc<Gc<Ty<T>>> = b;
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0367, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0367`.
[INFO] [stdout] 
[INFO] [stdout] error[E0367]: `!Immutable` impl requires `T: Sized` but the struct it is implemented for does not
[INFO] [stdout]    --> src/main.rs:158:10
[INFO] [stdout]     |
[INFO] [stdout] 158 |     impl<T> !Immutable for UnsafeCell<T> {}
[INFO] [stdout]     |          ^
[INFO] [stdout]     |
[INFO] [stdout] note: the implementor must specify the same requirement
[INFO] [stdout]    --> /rustc/ddcf048784667508cd676fef4667f88ae15628a3/library/core/src/cell.rs:2289:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gc-generic-std` (bin "gc-generic-std" test) due to 5 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]    --> src/main.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |             arena: &'a Arena<Self>,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next`
[INFO] [stdout]    --> src/main.rs:198:13
[INFO] [stdout]     |
[INFO] [stdout] 198 |             next: impl TyEq<ListL<T>>,
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_next`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/main.rs:199:13
[INFO] [stdout]     |
[INFO] [stdout] 199 |             value: impl TyEq<T>,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |             let e = todo!();
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next`
[INFO] [stdout]    --> src/main.rs:233:27
[INFO] [stdout]     |
[INFO] [stdout] 233 |                 Gc(Elem { next, value: v }) => {
[INFO] [stdout]     |                           ^^^^ help: try ignoring the field: `next: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/main.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 243 | /         pub fn insert<'r, 'a: 'r>(
[INFO] [stdout] 244 | |             self,
[INFO] [stdout] 245 | |             index: usize,
[INFO] [stdout] 246 | |             arena: &'a Arena<ElemL<Of<T>>>,
[INFO] [stdout] 247 | |         ) -> List<'r, Ty<'r, T>> {
[INFO] [stdout]     | |________________________________^ cannot return without recursing
[INFO] [stdout] 248 |               let Gc(Elem { value, next }) = self.0.unwrap();
[INFO] [stdout] 249 |               let next = next.insert(index - 1, arena);
[INFO] [stdout]     |                          ----------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0367, E0557, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0367`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gc-generic-std` (bin "gc-generic-std") due to 5 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "94fb94186d7270f5833ebaaedb81d1e92f6d965fa6d5009b4dc27f9f1162e4b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94fb94186d7270f5833ebaaedb81d1e92f6d965fa6d5009b4dc27f9f1162e4b6", kill_on_drop: false }`
[INFO] [stdout] 94fb94186d7270f5833ebaaedb81d1e92f6d965fa6d5009b4dc27f9f1162e4b6
