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bors 068609ce76 Auto merge of #138601 - RalfJung:wasm-abi-fcw, r=alexcrichton 
add FCW to warn about wasm ABI transition

See https://github.com/rust-lang/rust/issues/122532 for context: the "C" ABI on wasm32-unk-unk will change. The goal of this lint is to warn about any function definition and calls whose behavior will be affected by the change. My understanding is the following:
- scalar arguments are fine
  - including 128 bit types, they get passed as two `i64` arguments in both ABIs
- `repr(C)` structs (recursively) wrapping a single scalar argument are fine (unless they have extra padding due to over-alignment attributes)
- all return values are fine

`@bjorn3` `@alexcrichton` `@Manishearth` is that correct?

I am making this a "show up in future compat reports" lint to maximize the chances people become aware of this. OTOH this likely means warnings for most users of Diplomat so maybe we shouldn't do this?

IIUC, wasm-bindgen should be unaffected by this lint as they only pass scalar types as arguments.

Tracking issue: https://github.com/rust-lang/rust/issues/138762
Transition plan blog post: https://github.com/rust-lang/blog.rust-lang.org/pull/1531

try-job: dist-various-2
2025-03-26 00:06:46 +00:00
..
rustc Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_abi Use {Decodable,Encodable}_NoContext in type_ir 2025-03-15 06:34:36 +00:00
rustc_arena Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_ast Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors 2025-03-25 18:09:07 +01:00
rustc_ast_ir Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_ast_lowering Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors 2025-03-25 18:09:07 +01:00
rustc_ast_passes Track whether an assoc item is in a trait impl or an inherent impl 2025-03-25 10:12:07 +00:00
rustc_ast_pretty Auto merge of #138747 - matthiaskrgr:rollup-68x44rw, r=matthiaskrgr 2025-03-20 22:35:15 +00:00
rustc_attr_data_structures add rustc_macro_edition_2021 2025-03-19 17:37:35 +01:00
rustc_attr_parsing Avoid kw::Empty when dealing with rustc_allowed_through_unstable_modules. 2025-03-25 16:48:03 +11:00
rustc_baked_icu_data Add unreachable_pub to RUSTC_LINT_FLAGS for compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_borrowck Auto merge of #138719 - lcnr:concrete_opaque_types-closures, r=oli-obk 2025-03-22 06:55:52 +00:00
rustc_builtin_macros Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors 2025-03-25 18:09:07 +01:00
rustc_codegen_cranelift Update compiler-builtins to 0.1.152 2025-03-24 00:29:21 +00:00
rustc_codegen_gcc Remove implicit #[no_mangle] for #[rustc_std_internal_symbol] 2025-03-17 14:08:09 +00:00
rustc_codegen_llvm Rollup merge of #137247 - dpaoliello:cleanllvm, r=Zalathar 2025-03-25 18:09:03 +01:00
rustc_codegen_ssa Auto merge of #138601 - RalfJung:wasm-abi-fcw, r=alexcrichton 2025-03-26 00:06:46 +00:00
rustc_const_eval Rollup merge of #138713 - RalfJung:memory-hook-pointers, r=oli-obk 2025-03-21 06:56:47 +01:00
rustc_data_structures Use hashbrown from crates.io 2025-03-21 07:54:35 +01:00
rustc_driver Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_driver_impl Implement supported-crate-types print request 2025-03-23 19:08:54 +08:00
rustc_error_codes Avoid kw::Empty when dealing with rustc_allowed_through_unstable_modules. 2025-03-25 16:48:03 +11:00
rustc_error_messages Rollup merge of #138404 - bjorn3:sysroot_handling_cleanup, r=petrochenkov,jieyouxu 2025-03-13 11:28:35 +01:00
rustc_errors Do not suggest using -Zmacro-backtrace for builtin macros 2025-03-14 19:50:03 +00:00
rustc_expand Track whether an assoc item is in a trait impl or an inherent impl 2025-03-25 10:12:07 +00:00
rustc_feature Rollup merge of #138717 - jdonszelmann:pin-macro, r=WaffleLapkin 2025-03-21 15:48:57 +01:00
rustc_fluent_macro Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_fs_util Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_graphviz Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_hashes Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_hir Auto merge of #136974 - m-ou-se:fmt-options-64-bit, r=scottmcm 2025-03-22 10:56:14 +00:00
rustc_hir_analysis Auto merge of #138719 - lcnr:concrete_opaque_types-closures, r=oli-obk 2025-03-22 06:55:52 +00:00
rustc_hir_pretty Use Option<Ident> for lowered param names. 2025-03-19 20:54:10 +11:00
rustc_hir_typeck Explicitly don't fold coroutine obligations in writeback 2025-03-23 18:34:33 +00:00
rustc_incremental Auto merge of #138629 - Zoxc:graph-anon-hashmap, r=oli-obk 2025-03-24 15:02:09 +00:00
rustc_index Use {Decodable,Encodable}_NoContext in type_ir 2025-03-15 06:34:36 +00:00
rustc_index_macros Add unreachable_pub to RUSTC_LINT_FLAGS for compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_infer Obligation::as_goal 2025-03-23 18:18:47 +00:00
rustc_interface Rollup merge of #138581 - Zoxc:abort-handler-if-locked, r=SparrowLii 2025-03-25 18:09:05 +01:00
rustc_lexer Revert "Rollup merge of #136355 - GuillaumeGomez:proc-macro_add_value_retrieval_methods, r=Amanieu" 2025-03-18 13:28:56 +01:00
rustc_lint Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors 2025-03-25 18:09:07 +01:00
rustc_lint_defs add FCW to warn about wasm ABI transition 2025-03-25 08:22:35 +01:00
rustc_llvm coverage: Add LLVM plumbing for expansion regions 2025-03-20 12:40:36 +11:00
rustc_log Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_macros Move codec module back into middle 2025-03-15 06:42:48 +00:00
rustc_metadata Rollup merge of #138685 - nnethercote:use-Option-Ident-for-lowered-param-names, r=compiler-errors 2025-03-20 15:36:17 +01:00
rustc_middle Auto merge of #136410 - saethlin:clean-up-cgu-internal-copy, r=compiler-errors 2025-03-25 06:36:41 +00:00
rustc_mir_build Rollup merge of #138821 - dianne:cleanup-non-scalar-compare, r=oli-obk 2025-03-24 20:40:08 +01:00
rustc_mir_dataflow Auto merge of #138414 - matthiaskrgr:rollup-9ablqdb, r=matthiaskrgr 2025-03-12 17:27:43 +00:00
rustc_mir_transform coverage: Defer the filtering of hole spans 2025-03-21 21:23:50 +11:00
rustc_monomorphize acquire more accurate HirId for ABI check lints 2025-03-25 11:30:57 +01:00
rustc_next_trait_solver Allow WellFormed goals to be returned from relating in new solver 2025-03-24 16:57:06 +00:00
rustc_parse Use sym::dummy for a dummy arg in parse_fn_params. 2025-03-25 18:00:14 +11:00
rustc_parse_format Slim rustc_parse_format dependencies down 2025-03-23 07:30:18 +01:00
rustc_passes Use Option<Symbol> in DuplicateLangItem. 2025-03-25 16:20:43 +11:00
rustc_pattern_analysis Auto merge of #133889 - compiler-errors:inh-unstable, r=Nadrieril 2025-03-20 14:31:34 +00:00
rustc_privacy privacy: Visit types and traits in impls in type privacy lints 2025-03-25 12:40:02 +03:00
rustc_query_impl Rollup merge of #138581 - Zoxc:abort-handler-if-locked, r=SparrowLii 2025-03-25 18:09:05 +01:00
rustc_query_system Rollup merge of #138581 - Zoxc:abort-handler-if-locked, r=SparrowLii 2025-03-25 18:09:05 +01:00
rustc_resolve Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors 2025-03-25 18:09:07 +01:00
rustc_sanitizers Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_serialize Convert rustc_serialize integration tests to unit tests. 2025-03-20 08:59:50 +11:00
rustc_session Auto merge of #138601 - RalfJung:wasm-abi-fcw, r=alexcrichton 2025-03-26 00:06:46 +00:00
rustc_smir Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_span Move is_used_keyword_conditional. 2025-03-24 18:44:40 +11:00
rustc_symbol_mangling Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_target Auto merge of #138601 - RalfJung:wasm-abi-fcw, r=alexcrichton 2025-03-26 00:06:46 +00:00
rustc_trait_selection Obligation::as_goal 2025-03-23 18:18:47 +00:00
rustc_traits Rollup merge of #138394 - lcnr:yeet-variant, r=compiler-errors 2025-03-12 10:19:32 -07:00
rustc_transmute Add #[cfg(test)] for Transition in dfa 2025-03-18 07:17:16 +00:00
rustc_ty_utils Don't ICE when encountering placeholders in layout computation 2025-03-24 16:57:07 +00:00
rustc_type_ir Remove STILL_FURTHER_SPECIALIZABLE special casing 2025-03-23 18:13:52 +00:00
rustc_type_ir_macros Fold visit into ty 2025-03-15 06:34:36 +00:00
stable_mir Rollup merge of #138536 - makai410:mut-mir-visitor, r=celinval 2025-03-22 11:59:17 +01:00