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Can you give some more details on how to reproduce this? Which specific API is flagged for example?

I've attached a simple repro project; I have a java.time reference, and commented out core library desugaring; with that, lint correctly flags the problem:

$ ./gradlew :app:lint
...
DesugaringTest/app/src/main/java/com/example/desugaringtest/MainActivity.kt:13: Error: Call requires API level 26 (current min is 24): java.time.LocalTime#getHour [NewApi]
        println(time.hour)
                     ~~~~
1 errors, 0 warnings

When I uncomment the library desugaring statements at the bottom of app/build.gradle, lint stops complaining:

$  ./gradlew :app:lint

BUILD SUCCESSFUL in 1s
20 actionable tasks: 3 executed, 17 up-to-date

Looks like the desugared code has to be in a separate module. I modified your project to repro and attached here.

Thanks for the repro case! Investigating.

I just bumped into this as well. To reproduce, you can use the reproducer-260755411 branch of the Confetti project, especially this commit and run ./gradlew :shared:lintDebug:

$ ./gradlew :shared:lintDebug

> Configure project :shared
> Task :shared:lintReportDebug
Wrote HTML report to file:///Users/mbonnin/git/Confetti/shared/build/reports/lint-results-debug.html

> Task :shared:lintDebug FAILED
Lint found 1 errors, 0 warnings. First failure:

/Users/mbonnin/git/Confetti/shared/src/androidMain/kotlin/dev/johnoreilly/confetti/utils/AndroidDateTimeFormatter.kt:15: Error: Cast from Instant to TemporalAccessor requires API level 26 (current min is 21) [NewApi]
        return formatter.withZone(ZoneId.of(timeZone.id)).format(instant.toJavaInstant())
                                                                 ~~~~~~~~~~~~~~~~~~~~~~~

There was no error on AGP 7.3.1

This bug is fixed by https://cs.android.com/android-studio/platform/tools/base/+/7bc755425b0261bb6897e8975de1d8006c6c17df for both 8.1.0-dev and 8.0.0-beta; will also consider for 7.4.1.

There was also a related fix here for the scenario where you run lint on the library itself: https://cs.android.com/android-studio/platform/tools/base/+/a97632c01407e83dc3fa4fd9c393a5e54e4a0514

Thanks for the report and especially the clear repro!

Actually it sounds from the initial report like this wasn't broken in 7.4 (comment #5, did you jump straight from 7.3.1 to 8.0.0-alpha?) so I guess only 8.0 is relevant here.

comment #7 sorry I missed this notification but you're right, I went straight to 8.0.0-alpha09.

Also I just tried 8.0.0-alpha10 and it seems to be fixed there as well 👍

Thanks for confirming, glad to hear it!