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2.9.0 regression: compiler crash when accessing collection.immutable.Set.Set2 constructor #4645

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scabug opened this issue May 25, 2011 · 3 comments
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2.9.0 regression: compiler crash when accessing collection.immutable.Set.Set2 constructor #4645

scabug opened this issue May 25, 2011 · 3 comments
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scabug commented May 25, 2011

The following line crashes the compiler:

new collection.immutable.Set.Set2(1, 2)

Note that Set2's constructor is package private and it shouldn't actually reach icode.

error: java.lang.Error: Unexpected New
	at scala.tools.nsc.symtab.SymbolTable.abort(SymbolTable.scala:35)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:725)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genLoadArguments$1.apply(GenICode.scala:1226)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genLoadArguments$1.apply(GenICode.scala:1224)
	at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:111)
	at scala.collection.immutable.List.foldLeft(List.scala:45)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genLoadArguments(GenICode.scala:1224)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:924)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genLoadQualifier(GenICode.scala:1175)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:921)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genStat(GenICode.scala:174)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genStat$1.apply(GenICode.scala:143)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genStat$1.apply(GenICode.scala:143)
	at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:111)
	at scala.collection.immutable.List.foldLeft(List.scala:45)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genStat(GenICode.scala:143)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:1052)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:114)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$gen$1.apply(GenICode.scala:69)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$gen$1.apply(GenICode.scala:69)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:45)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:69)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:136)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:88)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$gen$1.apply(GenICode.scala:69)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$gen$1.apply(GenICode.scala:69)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:45)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:69)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:79)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:65)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.apply(GenICode.scala:61)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:326)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:326)
	at scala.tools.nsc.reporters.Reporter.withSource(Reporter.scala:47)
	at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:326)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:294)
	at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:294)
	at scala.collection.Iterator$class.foreach(Iterator.scala:652)
	at scala.collection.mutable.ListBuffer$$anon$1.foreach(ListBuffer.scala:311)
	at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:294)
	at scala.tools.nsc.backend.icode.GenICode$ICodePhase.run(GenICode.scala:54)
	at scala.tools.nsc.Global$Run.compileSources(Global.scala:949)
	at scala.tools.nsc.Global$Run.compile(Global.scala:1034)
	at scala.tools.nsc.Main$.process(Main.scala:106)
	at scala.tools.nsc.Main$.main(Main.scala:123)
	at scala.tools.nsc.Main.main(Main.scala)
@scabug
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scabug commented May 25, 2011

Imported From: https://issues.scala-lang.org/browse/SI-4645?orig=1
Reporter: @ingoem
Affected Versions: 2.9.0

@scabug
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scabug commented Jul 13, 2011

@paulp said:
There is something truly unholy taking place here with implicit conversions and auto-tupling.

If you give an extra pair of parens it fails in typer as it should:

scala> new collection.immutable.Set.Set2((1, 2))
<console>:8: error: constructor Set2 in class Set2 cannot be accessed in object $iw
              new collection.immutable.Set.Set2((1, 2))
              ^

Take them away, and behold! A little something for everyone in that expression. It's not even calling '+' on the StringAdd instance.

scala> new collection.immutable.Set.Set2(1, 2)
[...]
private[this] val res0: scala.runtime.StringAdd = 
  scala.this.Predef.any2stringadd(new collection.immutable.Set.Set2[Nothing]).this(scala.this.Tuple2.apply[Int, Int](1, 2));

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scabug commented Oct 30, 2011

@paulp said:
#4645, #4685, #4707, #4987, #5058 are all the same bug. Consolidating under #4987.

@scabug scabug closed this as completed Oct 30, 2011
This was referenced Apr 7, 2017
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