[KSP] Processing crash when two assisted inject constructors are encountered

[ZacSweers]

The following code snippet

package com.squareup.test

import dagger.assisted.Assisted
import dagger.assisted.AssistedInject

class AssistedService @AssistedInject constructor(
  int: Int,
  @Assisted string: String
) {
  @AssistedInject constructor(@Assisted string: String)
}

will correctly error in apt with this message

Type com.squareup.test.AssistedService may only contain one injected constructor. Found: [@dagger.assisted.AssistedInject com.squareup.test.AssistedService, @dagger.assisted.AssistedInject com.squareup.test.AssistedService]

but will crash in KSP processing with the below trace. Note the message appears to be correct, but the crash is cause and reported after it's logged.

This is with Dagger version 2.47.

e: Error occurred in KSP, check log for detail
e: [ksp] /var/folders/nv/96k28mh96ml0g6y4gxkpjfcw0000gn/T/Kotlin-Compilation5455861261926387550/sources/src/main/java/com/squareup/test/Source0.kt:6: Type com.squareup.test.AssistedService may only contain one injected constructor. Found: [@dagger.assisted.AssistedInject com.squareup.test.AssistedService(int, String), @dagger.assisted.AssistedInject com.squareup.test.AssistedService(String)]
e: [ksp] java.lang.IllegalArgumentException: expected one element but was: <<init>, <init>>
	at com.google.common.collect.Iterators.getOnlyElement(Iterators.java:323)
	at com.google.common.collect.Iterables.getOnlyElement(Iterables.java:263)
	at dagger.internal.codegen.binding.AssistedInjectionAnnotations.assistedInjectAssistedParameters(AssistedInjectionAnnotations.java:257)
	at dagger.internal.codegen.processingstep.AssistedInjectProcessingStep$AssistedInjectValidator.validate(AssistedInjectProcessingStep.java:60)
	at dagger.internal.codegen.processingstep.AssistedInjectProcessingStep.process(AssistedInjectProcessingStep.java:51)
	at dagger.internal.codegen.processingstep.AssistedInjectProcessingStep.process(AssistedInjectProcessingStep.java:35)
	at dagger.internal.codegen.processingstep.TypeCheckingProcessingStep.lambda$process$0(TypeCheckingProcessingStep.java:82)
	at com.google.common.collect.RegularImmutableMap.forEach(RegularImmutableMap.java:196)
	at dagger.internal.codegen.processingstep.TypeCheckingProcessingStep.process(TypeCheckingProcessingStep.java:70)
	at dagger.internal.codegen.processingstep.TypeCheckingProcessingStep.process(TypeCheckingProcessingStep.java:48)
	at dagger.spi.shaded.androidx.room.compiler.processing.XProcessingStep.process(XProcessingStep.kt:59)
	at dagger.spi.shaded.androidx.room.compiler.processing.CommonProcessorDelegate.processRound(XBasicAnnotationProcessor.kt:130)
	at dagger.spi.shaded.androidx.room.compiler.processing.ksp.KspBasicAnnotationProcessor.process(KspBasicAnnotationProcessor.kt:62)

[bcorso]

This was fixed by 698f6cb.

The fix will be included in the next release.