These are typically cases that will typecheck quickly once the developer corrects the actual programming error, so the warning is just reporting something that only the Swift team can fix.
You're using an internal debugging option, not a supported feature of the compiler. We want to know why things are slow even when they fail to typecheck.
Additional Detail from JIRA
| | | |------------------|-----------------| |Votes | 0 | |Component/s | Compiler | |Labels | Improvement | |Assignee | None | |Priority | Medium | md5: 9491af4c8216f39e3e6b19866ea30431Issue Description:
These are typically cases that will typecheck quickly once the developer corrects the actual programming error, so the warning is just reporting something that only the Swift team can fix.