"multiple return types for content-type ..." problem not shown in VS Code

[mikekistler]

Removing the @error decorator from the error schema will produce a compile error:

error @cadl-lang/rest/duplicate-response: Multiple return types for content type application/json and status code 200

But this error is not highlighted when the code is viewed in VS Code with the Cadl VS Code extension enabled.

Compiler version: Cadl compiler v0.38.3

[timotheeguerin]

Ok so we found that the error is due to the auth.cadl has an invalid js doc by having p@55w0rd string inside

/**
 *  p@55w0rd 
 */
model BasicAuth {}

but because right now only the ide parse jsdoc then we odn't see that issue in the compiler.

The reason it doesn't show anythjing is :

1. we don't show errors in non opened files: in this case an insalled library file
2. if there is any errors we don't continue to the next step(validate) to prevent cascade of errors

[nguerrera]

Immediate issue fixed by #1438 (#1442 merged to main)

Follow-up issues to prevent regression:

#1439, #1441