[Bug]: @typespec/openapi3 - TypeError: Cannot read properties of undefined (reading 'add')

[btiernay]

Describe the bug

The following will crash the compiler:

import "@typespec/http";

using TypeSpec.Http;

@service({title: "test"})
@useAuth(TestModel)
namespace TestNamespace {
    op call(): void;
}

model TestModel {}

With this output:

Internal compiler error!  
File issue at https://github.com/microsoft/typespec

ExternalError: Emitter "@typespec/openapi3" crashed! This is a bug.  
Please file an issue at https://github.com/microsoft/typespec/issues

TypeError: Cannot read properties of undefined (reading 'add')  
at getOpenAPI3SchemeInternal (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:1288:29)
at getOpenAPI3Scheme (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:1254:24)
at getOpenAPISecuritySchemes (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:1217:28)
at initializeEmitter (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:153:33)
at getOpenApiFromVersion (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:419:13)
at getProjectedOpenAPIDocument (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:307:36)
at getOpenAPI (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:258:40)
at Object.emitOpenAPI (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:106:32)
at Object.$onEmit [as emitFunction] (file:///node_modules/@typespec/openapi3/dist/src/openapi.js:25:19)
at runEmitter (file:///node_modules/@typespec/compiler/dist/src/core/program.js:452:27)

--------------------------------------------------  
Library Version                0.59.1  
TypeSpec Compiler Version      0.59.1  
--------------------------------------------------  
at runEmitter (file:///node_modules/@typespec/compiler/dist/src/core/program.js:455:19)
at async compile (file:///node_modules/@typespec/compiler/dist/src/core/program.js:132:9)
at async compile (file:///node_modules/@typespec/compiler/dist/src/server/compile-service.js:54:27)
at async #update (file:///node_modules/@typespec/compiler/dist/src/server/update-manager.js:30:9)

Reproduction

https://typespec.io/playground?c=aW1wb3J0ICJAdHlwZXNwZWMvaHR0cCI7Cgp1c2luZyBUeXBlU3BlYy5IdHRwOwoKQHNlcnZpY2Uoe3RpdGxlOiAidGVzdCJ9KQpAdXNlQXV0aChUZXN0TW9kZWwpCm5hbWVzcGFjZSDEFU7JDnsKICAgIG9wIGNhbGwoKTogdm9pZDsKfQoKbcQ5xS7FQyB7fQ%3D%3D&e=%40typespec%2Fopenapi3&options=%7B%7D

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[chrisradek]

This is a duplicate of #4097

Just checked and looks like #4133 will fix this once merged.