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Remove an old, horrible compatibility hack in the _Concurrency module

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The concurrency module was getting an implicit
`-disable-availability-checking` as a workaround from the Swift 5.6
days. Remove it, because it causes problems with the new `Failure`
type in the async for..in loop.

Fixes a back-deployment issue with async algorithms in the
_Concurrency library that use the async for..in loop.
This commit is contained in:
Doug Gregor
2024-05-15 16:56:59 -07:00
parent c20331b789
commit 214d3f6980
1 changed files with 0 additions and 7 deletions
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7
lib/Frontend/CompilerInvocation.cpp
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@@ -470,13 +470,6 @@ static void SaveModuleInterfaceArgs(ModuleInterfaceOptions &Opts,
interleave(RenderedArgs,
[&](const char *Argument) { PrintArg(OS, Argument, StringRef()); },
[&] { OS << " "; });
// Backward-compatibility hack: disable availability checking in the
// _Concurrency module, so that older (Swift 5.5) compilers that did not
// support back deployment of concurrency do not complain about 'async'
// with older availability.
if (FOpts.ModuleName == "_Concurrency")
OS << " -disable-availability-checking";
}
{
llvm::raw_string_ostream OS(Opts.IgnorablePrivateFlags);