IssueTracker

We don't need the information listed above, that's pretty standard verbiage from the triage bug front end for all Studio issues.

However, that message (Unexpected failure) is normally followed by an actual stacktrace summary which pinpoints the problem. Here's a sample message which is emitted during one of lint's unit tests for this (which deliberately crashes):

src/test/pkg/Foo.java: Error: Unexpected failure during lint analysis of Foo.java (this is a bug in lint or one of the libraries it depends on)

Message: / by zero

The crash seems to involve the detector com.android.tools.lint.client.api.LintDriverCrashTest＄CrashingDetector.
You can try disabling it with something like this:
    android {
        lintOptions {
            disable "_TestCrash"
        }
    }

Stack: ArithmeticException:LintDriverCrashTest＄CrashingDetector＄createUastHandler＄1.visitFile(LintDriverCrashTest.kt:178)
←UElementVisitor＄DispatchPsiVisitor.visitFile(UElementVisitor.kt:707)←UFile＄DefaultImpls.accept(UFile.kt:80)
←JavaUFile.accept(JavaUFile.kt:11)←UElementVisitor＄visitFile＄4.run(UElementVisitor.kt:292)
←LintClient.runReadAction(LintClient.kt:1770)←TestLintClient.runReadAction(TestLintClient.java:893)
←LintDriver＄LintClientWrapper.runReadAction(LintDriver.kt:2615) [LintError]
1 errors, 0 warnings

Do you have similar output?

Here is the full output

mac16:rollertoaster coltonidle$ ./gradlew app:lintFreeDebug

> Configure project :
The Dependency Analysis plugin is only known to work with versions of AGP between 3.5.4 and 7.0.0-alpha05. You are using 7.1.0-alpha01. Proceed at your own risk.

> Configure project :app
WARNING:API 'BaseVariant.getApplicationIdTextResource' is obsolete and has been replaced with 'VariantProperties.applicationId'.
It will be removed in version 7.0 of the Android Gradle plugin.
For more information, see TBD.
To determine what is calling BaseVariant.getApplicationIdTextResource, use -Pandroid.debug.obsoleteApi=true on the command line to display more information.

> Task :app:lintAnalyzeFreeDebug
w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath:
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.5.10/3f4af7aff21c4ec46e3cdd645639d0a63a68d3d0/kotlin-stdlib-jdk8-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.5.10/c49d0703d16c6cb1526cc07b9b46486da1dd8a60/kotlin-stdlib-jdk7-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/1.4.31/63db9d66c3d20f7b8f66196e7ba86969daae8b8a/kotlin-reflect-1.4.31.jar (version 1.4)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.5.10/da6a904b132f0402fa4d79169a3c1770598d4702/kotlin-stdlib-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.5.10/6b84d926e28493be69daf673e40076f89492ef7/kotlin-stdlib-common-1.5.10.jar (version 1.5)
w: Consider providing an explicit dependency on kotlin-reflect 1.5 to prevent strange errors
w: Some runtime JAR files in the classpath have an incompatible version. Consider removing them from the classpath

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.5.10/c49d0703d16c6cb1526cc07b9b46486da1dd8a60/kotlin-stdlib-jdk7-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.5.10/da6a904b132f0402fa4d79169a3c1770598d4702/kotlin-stdlib-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains/annotations/13.0/919f0dfe192fb4e063e7dacadee7f8bb9a2672a9/annotations-13.0.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.5.10/3f4af7aff21c4ec46e3cdd645639d0a63a68d3d0/kotlin-stdlib-jdk8-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.intellij.deps/trove4j/1.0.20181211/216c2e14b070f334479d800987affe4054cd563f/trove4j-1.0.20181211.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.5.10/6b84d926e28493be69daf673e40076f89492ef7/kotlin-stdlib-common-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/com.android.tools.external.com-intellij/intellij-core/30.1.0-alpha01/29f6bd46f757e6915c7eb6cc7d760f3d2a4bd089/intellij-core-30.1.0-alpha01.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/com.android.tools.external.org-jetbrains/uast/30.1.0-alpha01/deb7df8d140b1dea70341eba7fad43e763fb70d5/uast-30.1.0-alpha01.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Scanning app: .............................
Scanning app (Phase 2): .....................

> Task :app:lintFreeDebug FAILED
w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath:
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.5.10/3f4af7aff21c4ec46e3cdd645639d0a63a68d3d0/kotlin-stdlib-jdk8-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.5.10/c49d0703d16c6cb1526cc07b9b46486da1dd8a60/kotlin-stdlib-jdk7-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/1.4.31/63db9d66c3d20f7b8f66196e7ba86969daae8b8a/kotlin-reflect-1.4.31.jar (version 1.4)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.5.10/da6a904b132f0402fa4d79169a3c1770598d4702/kotlin-stdlib-1.5.10.jar (version 1.5)
    /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.5.10/6b84d926e28493be69daf673e40076f89492ef7/kotlin-stdlib-common-1.5.10.jar (version 1.5)
w: Consider providing an explicit dependency on kotlin-reflect 1.5 to prevent strange errors
w: Some runtime JAR files in the classpath have an incompatible version. Consider removing them from the classpath

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.5.10/c49d0703d16c6cb1526cc07b9b46486da1dd8a60/kotlin-stdlib-jdk7-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.5.10/da6a904b132f0402fa4d79169a3c1770598d4702/kotlin-stdlib-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains/annotations/13.0/919f0dfe192fb4e063e7dacadee7f8bb9a2672a9/annotations-13.0.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.5.10/3f4af7aff21c4ec46e3cdd645639d0a63a68d3d0/kotlin-stdlib-jdk8-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.intellij.deps/trove4j/1.0.20181211/216c2e14b070f334479d800987affe4054cd563f/trove4j-1.0.20181211.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.5.10/6b84d926e28493be69daf673e40076f89492ef7/kotlin-stdlib-common-1.5.10.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/com.android.tools.external.com-intellij/intellij-core/30.1.0-alpha01/29f6bd46f757e6915c7eb6cc7d760f3d2a4bd089/intellij-core-30.1.0-alpha01.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Custom lint rule jar /Users/coltonidle/.gradle/caches/modules-2/files-2.1/com.android.tools.external.org-jetbrains/uast/30.1.0-alpha01/deb7df8d140b1dea70341eba7fad43e763fb70d5/uast-30.1.0-alpha01.jar does not contain a valid registry manifest key (Lint-Registry-v2).
Either the custom jar is invalid, or it uses an outdated API not supported this lint client

Wrote HTML report to file:///Users/coltonidle/Dev/Projects/rollertoaster/app/build/reports/lint-results-freeDebug.html
Lint found 8 errors. First failure:
/Users/coltonidle/Dev/Projects/rollertoaster/app/src/free/java/com/rollertoaster/app/MockNetwork.kt: Error: Unexpected failure during lint analysis of MockNetwork.kt (this is a bug in lint or one of the libraries it depends on)


The crash seems to involve the detector androidx.fragment.lint.OnCreateDialogIncorrectCallbackDetector.
You can try disabling it with something like this:
    android {
        lintOptions {
            disable "DialogFragmentCallbacksDetector"
        }
    }

Stack: NullPointerException:OnCreateDialogIncorrectCallbackDetector$UastHandler.visitClass(OnCreateDialogIncorrectCallbackDetector.kt:78)←UElementVisitor$DispatchPsiVisitor.visitClass(UElementVisitor.kt:597)←UElementVisitor$DelegatingPsiVisitor.visitClass(UElementVisitor.kt:1156)←AbstractKotlinUClass.accept(KotlinUClass.kt:63)←ImplementationUtilsKt.acceptList(implementationUtils.kt:23)←UFile$DefaultImpls.accept(UFile.kt:83)←KotlinUFile.accept(KotlinUFile.kt:31)←UElementVisitor$visitFile$3.run(UElementVisitor.kt:281)

You can run with --stacktrace or set environment variable LINT_PRINT_STACKTRACE=true to dump a full stacktrace to stdout. [LintError]


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:lintFreeDebug'.
> A failure occurred while executing com.android.build.gradle.internal.lint.AndroidLintTask$AndroidLintLauncherWorkAction
   > There was a failure while executing work items
      > A failure occurred while executing com.android.build.gradle.internal.lint.AndroidLintWorkAction
         > Lint found errors in the project; aborting build.
           
           Fix the issues identified by lint, or add the following to your build script to proceed with errors:
           ...
           android {
               lintOptions {
                   abortOnError false
               }
           }
           ...

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 11s
58 actionable tasks: 3 executed, 9 from cache, 46 up-to-date

If I run the same command above but with --stacktrace I get this

The crash seems to involve the detector androidx.fragment.lint.OnCreateDialogIncorrectCallbackDetector.
You can try disabling it with something like this:
    android {
        lintOptions {
            disable "DialogFragmentCallbacksDetector"
        }
    }

Stack: NullPointerException:OnCreateDialogIncorrectCallbackDetector$UastHandler.visitClass(OnCreateDialogIncorrectCallbackDetector.kt:78)←UElementVisitor$DispatchPsiVisitor.visitClass(UElementVisitor.kt:597)←UElementVisitor$DelegatingPsiVisitor.visitClass(UElementVisitor.kt:1156)←AbstractKotlinUClass.accept(KotlinUClass.kt:63)←ImplementationUtilsKt.acceptList(implementationUtils.kt:23)←UFile$DefaultImpls.accept(UFile.kt:83)←KotlinUFile.accept(KotlinUFile.kt:31)←UElementVisitor$visitFile$3.run(UElementVisitor.kt:281) [LintError]

Thanks! This looks like it's a bug in one of the AndroidX-bundled lint checks; it looks like the problem is with the unsafe null call:

https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:fragment/fragment-lint/src/main/java/androidx/fragment/lint/OnCreateDialogIncorrectCallbackDetector.kt;l=78;drc=52b166175eabed99d14515190bfa0a7cea787004

Reassigning to AndroidX for triage.

Can you attach a sample project or enough code to reproduce this issue?

I don't have a sample project, but the error points to this file seemingly?

package com.rollertoaster.app

import okhttp3.mockwebserver.Dispatcher
import okhttp3.mockwebserver.MockResponse
import okhttp3.mockwebserver.RecordedRequest

val MY_DISPATCHER: Dispatcher =
object : Dispatcher() {
override fun dispatch(request: RecordedRequest): MockResponse {
return MockResponse().setResponseCode(404)
}
}

Some more info here: https://groups.google.com/g/lint-dev/c/HYA_jZckXlI/m/X4O8aGuDAAAJ

But besides that I don't have a repo that shows this publicly available.

This is an unrelated issue, but Tor says "Methods aren't guaranteed to have a surrounding class so probably safest to use the ?. operator..." and so maybe that's what has to be done in this lint check as well?

https://groups.google.com/g/lint-dev/c/Am4ujNS0sBE/m/173DRCkzCQAJ

We've improved this lint check and the updated check will be available in Fragment 1.4.0-alpha03.

Looking forward to it. Thanks!

Are all of your deps up to date? This problem was fixed for me.