Rollup of 4 pull requests

[Dylan-DPC]

Successful merges:

• Add assertion that transmute_copy's U is not larger than T #98839 (Add assertion that transmute_copy's U is not larger than T)
• Remove the unused StableSet and StableMap types from rustc_data_structures. #99058 (Remove the unused StableSet and StableMap types from rustc_data_structures.)
• add missing null ptr check in alloc example #99198 (add missing null ptr check in alloc example)
• Add regression test for #95230 #99394 (Add regression test for Outlives error for where-clause with HRTB and no trait bounds #95230)

Failed merges:

• Use LocalDefId in OpaqueTypeKey #99347 (Use LocalDefId in OpaqueTypeKey)

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[rust-log-analyzer]

The job mingw-check failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

    Checking rustc_query_impl v0.0.0 (/checkout/compiler/rustc_query_impl)
    Checking rustc_passes v0.0.0 (/checkout/compiler/rustc_passes)
    Checking rustc_save_analysis v0.0.0 (/checkout/compiler/rustc_save_analysis)
error[E0432]: unresolved import `rustc_data_structures::stable_map`
 --> compiler/rustc_mir_dataflow/src/un_derefer.rs:1:28
1 | use rustc_data_structures::stable_map::FxHashMap;
  |                            ^^^^^^^^^^ could not find `stable_map` in `rustc_data_structures`

error[E0283]: type annotations needed
error[E0283]: type annotations needed
  --> compiler/rustc_mir_dataflow/src/move_paths/builder.rs:37:66
   |
37 |             un_derefer: UnDerefer { tcx: tcx, derefer_sidetable: Default::default() },
   |
   = note: cannot satisfy `_: std::default::Default`

Some errors have detailed explanations: E0283, E0432.