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Manish Goregaokar 3d86aac990
Rollup merge of #88782 - asquared31415:issue-79559, r=cjgillot 
Fix ICE when `start` lang item has wrong generics

In my previous pr #87875 I missed the requirements on the `start` lang item due to its relative difficulty to test and opting for more conservative estimates.  This fixes that by updating the requirement to be exactly one generic type.

The `start` lang item should have exactly one generic type for the return type of the `main` fn ptr passed to it.  I believe having zero would previously *sometimes* compile (often with the use of `fn() -> ()` as the fn ptr but it was likely UB to call if the return type of `main` was not `()` as far as I know) however it also sometimes would not for various errors including ICEs and LLVM errors depending on exact situations.  Having more than 1 generic has always failed with an ICE because only the one generic type is expected and provided.

Fixes #79559, fixes #73584, fixes #83117 (all duplicates)
Relevant to #9307

r? ````@cjgillot````
2021-09-30 18:05:20 -07:00
..
rustc Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_apfloat Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_arena Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast_lowering rustc_index: Add some map-like APIs to IndexVec 2021-09-22 03:11:29 +03:00
rustc_ast_passes Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast_pretty Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_attr Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_borrowck Auto merge of #87998 - nneonneo:master, r=oli-obk 2021-09-30 13:23:09 +00:00
rustc_builtin_macros derive: Do not configure or clone items unless necessary 2021-09-24 21:45:51 +03:00
rustc_codegen_cranelift Auto merge of #89092 - bjorn3:sync_cg_clif-2021-09-19, r=bjorn3 2021-09-26 23:31:01 +00:00
rustc_codegen_gcc Merge commit 'cd4810de42c57b64b74dae09c530a4c3a41f87b9' into libgccjit-codegen 2021-09-28 09:33:06 -04:00
rustc_codegen_llvm Enable new pass manager on LLVM 13 2021-09-25 11:24:23 +02:00
rustc_codegen_ssa Auto merge of #89030 - nbdd0121:box2, r=jonas-schievink 2021-09-25 11:01:13 +00:00
rustc_const_eval Report heap allocation instead of non-const fn for exchange_malloc call 2021-09-25 01:08:41 +01:00
rustc_data_structures More tracing instrumentation 2021-09-28 12:28:22 +00:00
rustc_driver Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_error_codes Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_errors Rollup merge of #89046 - oli-obk:fix_oflo, r=estebank 2021-09-22 19:03:22 +02:00
rustc_expand Improve help for recursion limit errors 2021-09-28 22:17:13 +02:00
rustc_feature Stabilize feature(macro_attributes_in_derive_output) 2021-09-24 21:48:30 +03:00
rustc_fs_util Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_graphviz Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_hir Rollup merge of #88782 - asquared31415:issue-79559, r=cjgillot 2021-09-30 18:05:20 -07:00
rustc_hir_pretty Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_incremental Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_index rustc_index: Add some map-like APIs to IndexVec 2021-09-22 03:11:29 +03:00
rustc_infer More tracing instrumentation 2021-09-28 12:28:22 +00:00
rustc_interface rustc_session: Remove lint store from Session 2021-09-28 11:56:15 +03:00
rustc_lexer Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_lint rustc_session: Remove lint store from Session 2021-09-28 11:56:15 +03:00
rustc_lint_defs Auto merge of #88865 - guswynn:must_not_suspend, r=oli-obk 2021-09-22 06:43:33 +00:00
rustc_llvm PassWrapper: handle function rename from upstream D36850 2021-09-27 18:11:21 -04:00
rustc_macros Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_metadata Auto merge of #89016 - lcnr:non_blanket_impls, r=nikomatsakis,michaelwoerister 2021-09-23 15:44:53 +00:00
rustc_middle More tracing instrumentation 2021-09-28 12:28:22 +00:00
rustc_mir_build Auto merge of #89386 - ehuss:rollup-idf4dmj, r=ehuss 2021-09-30 04:51:41 +00:00
rustc_mir_dataflow More tracing instrumentation 2021-09-28 12:28:22 +00:00
rustc_mir_transform Auto merge of #89030 - nbdd0121:box2, r=jonas-schievink 2021-09-25 11:01:13 +00:00
rustc_monomorphize Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_parse Check for macros in built-in attributes that don't support them. 2021-09-25 09:03:15 -07:00
rustc_parse_format Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_passes Auto merge of #88865 - guswynn:must_not_suspend, r=oli-obk 2021-09-22 06:43:33 +00:00
rustc_plugin_impl Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_privacy Auto merge of #89103 - Mark-Simulacrum:migrate-2021, r=estebank 2021-09-21 19:25:49 +00:00
rustc_query_impl Auto merge of #89120 - In-line:remove_unneded_visible_parents_map, r=estebank 2021-09-24 05:29:49 +00:00
rustc_query_system Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_resolve More tracing instrumentation 2021-09-28 12:28:22 +00:00
rustc_save_analysis Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_serialize Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_session rustc_session: Remove lint store from Session 2021-09-28 11:56:15 +03:00
rustc_span Rollup merge of #89072 - bjorn3:less_symbol_as_str, r=michaelwoerister 2021-09-24 11:40:12 -07:00
rustc_symbol_mangling Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_target Add SOLID targets 2021-09-28 11:31:47 +09:00
rustc_trait_selection Improve help for recursion limit errors 2021-09-28 22:17:13 +02:00
rustc_traits Improve cause information for NLL higher-ranked errors 2021-09-27 10:23:45 -05:00
rustc_ty_utils Auto merge of #89144 - sexxi-goose:insig_stdlib, r=nikomatsakis 2021-09-26 19:36:00 +00:00
rustc_type_ir Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_typeck Auto merge of #89282 - sexxi-goose:fix-88118, r=nikomatsakis 2021-09-30 20:23:47 +00:00