[swift-dev] ExistentialMetatypeType assertion failure on Linux
lukeh at padl.com
Wed Dec 30 16:37:58 CST 2015
> On 31 Dec 2015, at 5:03 AM, Joe Groff <jgroff at apple.com> wrote:
>> On Dec 29, 2015, at 9:04 PM, Luke Howard via swift-dev <swift-dev at swift.org> wrote:
>> I’m seeing an assertion failure when I try to compile the following on Linux:
>> typealias TypeMetadataAccessor = @convention(c) () -> AnyClass?
>> The assertion failing is:
>> assert(getASTContext().LangOpts.EnableObjCInterop ||
>> *repr != MetatypeRepresentation::ObjC);
>> in ExistentialMetatypeType::ExistentialMetatypeType(). Commenting it out and the code compiles and works.
>> Can someone that understands the compiler suggest the correct fix?
> It looks like you're trying to poke at private runtime metadata structures; please don't do that. What are you trying to do?
Per our exchange yesterday – implement NSStringFromClass() heuristics for NSKeyedArchiver
A better solution would be to provide a proposed API/patch to the runtime but I was just trying to get the NSCoding branch testable on Linux first – can’t tackle everything at once.
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