method disambiguator fails to find method for type alias

[Strum355]

Question in the Kotlin Slack unfortunately received no responses. We successfully extract the methods of the aliased type which look to include the method we're looking for, but indexOf returns -1. Following image shows the exception:

While this image shows the view in the debugger. The variables to observe are originalDesc (the "unwrapped" version of desc, the constructor), and the list of methods.

Commented-out test that triggers the bug: https://github.com/sourcegraph/lsif-kotlin/blob/main/semanticdb-kotlinc/src/test/kotlin/com/sourcegraph/semanticdb_kotlinc/test/SemanticdbSymbolsTest.kt#L92-L101