Reject unsupported `extern "{abi}"`s consistently in all positions#142134

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workingjubilee wants to merge 12 commits intorust-lang:masterfrom

workingjubilee:reject-unsupported-abi

Commits on Jun 23, 2025

compiler: plug unsupported ABI leakage from the AST

workingjubilee
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RalfJung
committed
hir_analysis: Avoid repeating unsupported ABI errors
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compiler: Remove unsupported_fn_ptr_calling_conventions lint
workingjubilee
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Clarify note in rustc_ast_lowering still applies

workingjubilee
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RalfJung
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unsupported_calling_conventions: print which ABI this is about

RalfJung
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workingjubilee
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tests: Bless abi_gpu_kernel feature gate test
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tests: Enhance unsupported ABI tests
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tests: Update raw-dylib unsupported ABI test
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tests: Update and bless cmse-nonsecure ABI tests
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tests: Adopt ABI transmute tests from crashtests
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tests: Verify varargs with unsupported fn ptr ABIs must error
workingjubilee
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tests: Bless cannot-be-called and dedup with unsupported ABI test
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