[INFO] fetching crate ghost-gc 0.2.1...
[INFO] checking ghost-gc-0.2.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate ghost-gc 0.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate ghost-gc 0.2.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ghost-gc 0.2.1
[INFO] tweaked toml for crates.io crate ghost-gc 0.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ghost-gc 0.2.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ghost-gc 0.2.1 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7cf9d0c4092d8a1919dc8c2a2a6843983146f934ca2b4bc4d56b149b1ab300bb
[INFO] running `Command { std: "docker" "start" "-a" "7cf9d0c4092d8a1919dc8c2a2a6843983146f934ca2b4bc4d56b149b1ab300bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7cf9d0c4092d8a1919dc8c2a2a6843983146f934ca2b4bc4d56b149b1ab300bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cf9d0c4092d8a1919dc8c2a2a6843983146f934ca2b4bc4d56b149b1ab300bb", kill_on_drop: false }`
[INFO] [stdout] 7cf9d0c4092d8a1919dc8c2a2a6843983146f934ca2b4bc4d56b149b1ab300bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91b907fea96a1fb1de9605f62ba991efc06e9835221322a9ea3cea515633645e
[INFO] running `Command { std: "docker" "start" "-a" "91b907fea96a1fb1de9605f62ba991efc06e9835221322a9ea3cea515633645e", kill_on_drop: false }`
[INFO] [stderr]     Checking ghost-gc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]  --> src/gc_vtable.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
[INFO] [stdout]   |                              --------- in this derive macro expansion
[INFO] [stdout] 7 | pub struct GcVTable {
[INFO] [stdout] 8 |     collect: unsafe fn(GcBox<Erased>, &Collector),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the address of the same function can vary between different codegen units
[INFO] [stdout]   = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]   = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]   = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]  --> src/gc_vtable.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
[INFO] [stdout]   |                              --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 9 |     drop_in_place: unsafe fn(GcBox<Erased>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the address of the same function can vary between different codegen units
[INFO] [stdout]   = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]   = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]  --> src/gc_vtable.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
[INFO] [stdout]   |                              --------- in this derive macro expansion
[INFO] [stdout] 7 | pub struct GcVTable {
[INFO] [stdout] 8 |     collect: unsafe fn(GcBox<Erased>, &Collector),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the address of the same function can vary between different codegen units
[INFO] [stdout]   = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]   = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]   = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]  --> src/gc_vtable.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
[INFO] [stdout]   |                              --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 9 |     drop_in_place: unsafe fn(GcBox<Erased>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the address of the same function can vary between different codegen units
[INFO] [stdout]   = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]   = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "91b907fea96a1fb1de9605f62ba991efc06e9835221322a9ea3cea515633645e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91b907fea96a1fb1de9605f62ba991efc06e9835221322a9ea3cea515633645e", kill_on_drop: false }`
[INFO] [stdout] 91b907fea96a1fb1de9605f62ba991efc06e9835221322a9ea3cea515633645e