Typescript compiler crashes when an interface member property is encountered which is a generic function with a type parameter that extends an unknown type

[lorefnon]

TypeScript Version: "3.3.0-dev.20181129"

Search Terms:

• This is unknown parent for type parameter
• 163

Code

export interface Foo {
    preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined 
}

// tsconfig.json
{
    "compilerOptions": {
        "moduleResolution": "node",
        "target": "es6",
        "strict": true,
        "sourceMap": true,
        "declaration": true,
        "declarationDir": "lib",
        "outDir": "lib"
    }
}

Expected behavior:

Compiler reports an error about the type T2 not being defined

Actual behavior:

Compiler crashes and does not provide any information on what needs to be done to resolve the issue.

$ tsc
C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:71037
                throw e;
                ^

Error: Debug Failure. This is unknown parent for type parameter: 165
    at getTypeParameterConstraintVisibilityError (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:64630:37)
    at handleSymbolAccessibilityError (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:64756:33)
    at checkEntityNameVisibility (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:65080:13)
    at visitDeclarationSubtree (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:65226:25)
    at visitNode (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:53392:23)
    at Object.visitEachChild (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:53502:112)
    at visitDeclarationSubtree (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:65278:43)
    at Object.visitNodes (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:53429:48)
    at visitDeclarationSubtree (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:65291:76)
    at Object.visitNode (C:\Users\loref\Projects\ts-test\node_modules\typescript\lib\tsc.js:53392:23)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Playground Link:

Not reproducible

Related Issues:

#25456

[lorefnon]

A reproducer can be found in this repo: https://github.com/lorefnon/ts-issue-28728