IssueTracker

From the analysis of b/158018485 the issue is that different incompatible versions of the desugared libary DEX can end up in the "App Under Test" and the "Test APK" when running instrumented tests. Even when shrinking is turned off (and the two copies are identical, so not "incompatible") the handling of duplicate classes on Art/Dalvik VMs is undefined and is known to fail on some VMs.

From the internal work document:

Handle desugared library by collecting the desugared library keep rules from both app and test and use the combination of these when building the desugared library DEX that goes into the app. There will be no desugared library in the test. This will fix b/158018485.