Compiler crash using private var constructor parameter and user-defined setter for field of the same name #25183
Description
Compiler version
3.3.7 LTS
Minimized code
class Counter(private var count: Int = 0):
def count_=(newCount: Int) = this.count = newCountUpdate based on the simplification that @som-snytt kindly pointed out:
class Counter(private var count: Int):
def count_=(newCount: Int) = this.count = newCountScastie
https://scastie.scala-lang.org/BG0UcXeiSWerJ6n5ju2ZDw
Output (click arrow to expand)
Details
unhandled exception while running MegaPhase{pruneErasedDefs, uninitialized, inlinePatterns, vcInlineMethods, seqLiterals, intercepted, getters, specializeFunctions, specializeTuples, collectNullableFields, elimOuterSelect, resolveSuper, functionXXLForwarders, paramForwarding, genericTuples, letOverApply, arrayConstructors} on /tmp/scastie3548195071586370706/src/main/scala/main.scala
An unhandled exception was thrown in the compiler.
Please file a crash report here:
https://github.com/scala/scala3/issues/new/choose
For non-enriched exceptions, compile with -Xno-enrich-error-messages.
while compiling: /tmp/scastie3548195071586370706/src/main/scala/main.scala
during phase: MegaPhase{pruneErasedDefs, uninitialized, inlinePatterns, vcInlineMethods, seqLiterals, intercepted, getters, specializeFunctions, specializeTuples, collectNullableFields, elimOuterSelect, resolveSuper, functionXXLForwarders, paramForwarding, genericTuples, letOverApply, arrayConstructors}
mode: Mode(ImplicitsEnabled)
library version: version 2.13.16
compiler version: version 3.3.7
settings: -classpath /tmp/scastie3548195071586370706/target/scala-3.3.7/classes:/scastie-cache/coursier/https/repo1.maven.org/maven2/org/scala-lang/scala3-library_3/3.3.7/scala3-library_3-3.3.7.jar:/home/sbtRunnerContainer/.ivy2/local/org.scastie/runtime-scala_3/1.0.0-SNAPSHOT/jars/runtime-scala_3.jar:/scastie-cache/coursier/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.16/scala-library-2.13.16.jar -d /tmp/scastie3548195071586370706/target/scala-3.3.7/classes -deprecation true -feature true
Stack trace:
java.lang.AssertionError: assertion failed: method count
at scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8)
at dotty.tools.dotc.ast.tpd$TreeOps$.becomes$extension(tpd.scala:1093)
at dotty.tools.dotc.transform.Getters.transformAssign(Getters.scala:117)
at dotty.tools.dotc.transform.MegaPhase.goAssign(MegaPhase.scala:750)
at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:353)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:448)
at dotty.tools.dotc.transform.MegaPhase.mapDefDef$1(MegaPhase.scala:259)
at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:262)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:446)
at dotty.tools.dotc.transform.MegaPhase.loop$1(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:370)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:448)
at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:266)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:446)
at dotty.tools.dotc.transform.MegaPhase.loop$1(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:370)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:448)
at dotty.tools.dotc.transform.MegaPhase.transformNamed$1(MegaPhase.scala:266)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:446)
at dotty.tools.dotc.transform.MegaPhase.loop$1(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.transformStats(MegaPhase.scala:459)
at dotty.tools.dotc.transform.MegaPhase.mapPackage$1(MegaPhase.scala:390)
at dotty.tools.dotc.transform.MegaPhase.transformUnnamed$1(MegaPhase.scala:393)
at dotty.tools.dotc.transform.MegaPhase.transformTree(MegaPhase.scala:448)
at dotty.tools.dotc.transform.MegaPhase.transformUnit(MegaPhase.scala:475)
at dotty.tools.dotc.transform.MegaPhase.run(MegaPhase.scala:487)
at dotty.tools.dotc.core.Phases$Phase.runOn$$anonfun$1(Phases.scala:341)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.immutable.List.foreach(List.scala:334)
at dotty.tools.dotc.core.Phases$Phase.runOn(Phases.scala:337)
at dotty.tools.dotc.Run.runPhases$1$$anonfun$1(Run.scala:351)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1324)
at dotty.tools.dotc.Run.runPhases$1(Run.scala:344)
at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:384)
at dotty.tools.dotc.Run.compileUnits$$anonfun$adapted$1(Run.scala:393)
at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:69)
at dotty.tools.dotc.Run.compileUnits(Run.scala:393)
at dotty.tools.dotc.Run.compileSources(Run.scala:297)
at dotty.tools.dotc.Run.compile(Run.scala:282)
at dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
at dotty.tools.xsbt.CompilerBridgeDriver.run(CompilerBridgeDriver.java:141)
at dotty.tools.xsbt.CompilerBridge.run(CompilerBridge.java:22)
at sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:91)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$7(MixedAnalyzingCompiler.scala:196)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:252)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:186)
at sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4$adapted(MixedAnalyzingCompiler.scala:166)
at sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:241)
at sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:166)
at sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:214)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:542)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:542)
at sbt.internal.inc.Incremental$.$anonfun$apply$3(Incremental.scala:182)
at sbt.internal.inc.Incremental$.$anonfun$apply$3$adapted(Incremental.scala:180)
at sbt.internal.inc.Incremental$$anon$2.run(Incremental.scala:458)
at sbt.internal.inc.IncrementalCommon$CycleState.next(IncrementalCommon.scala:117)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:56)
at sbt.internal.inc.IncrementalCommon$$anon$1.next(IncrementalCommon.scala:52)
at sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:263)
at sbt.internal.inc.Incremental$.$anonfun$incrementalCompile$8(Incremental.scala:413)
at sbt.internal.inc.Incremental$.withClassfileManager(Incremental.scala:500)
at sbt.internal.inc.Incremental$.incrementalCompile(Incremental.scala:400)
at sbt.internal.inc.Incremental$.apply(Incremental.scala:208)
at sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:542)
at sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:496)
at sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:332)
at sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:433)
at sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:137)
at sbt.Defaults$.compileIncrementalTaskImpl(Defaults.scala:2443)
at sbt.Defaults$.$anonfun$compileIncrementalTask$2(Defaults.scala:2393)
at sbt.internal.server.BspCompileTask$.$anonfun$compute$1(BspCompileTask.scala:41)
at sbt.internal.io.Retry$.apply(Retry.scala:47)
at sbt.internal.io.Retry$.apply(Retry.scala:29)
at sbt.internal.io.Retry$.apply(Retry.scala:24)
at sbt.internal.server.BspCompileTask$.compute(BspCompileTask.scala:41)
at sbt.Defaults$.$anonfun$compileIncrementalTask$1(Defaults.scala:2391)
at scala.Function1.$anonfun$compose$1(Function1.scala:49)
at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
at sbt.std.Transform$$anon$4.work(Transform.scala:69)
at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
at sbt.Execute.work(Execute.scala:292)
at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)