我正在将一个大型项目升级到 2.10.4 到 2.11.4。我遇到了编译器崩溃，是否无论如何可以显示导致崩溃的源文件的名称？我能够使用"最后的everitt/compile：compile"获得完整的跟踪
我将恢复到擦除项目的大部分内容，以二分搜索崩溃的原因。
顺便说一句，这是跟踪：
java.lang.NullPointerException
at scala.tools.nsc.typechecker.NamesDefaults$class.baseFunBlock$1(NamesDefaults.scala:130)
at scala.tools.nsc.typechecker.NamesDefaults$class.transformNamedApplication(NamesDefaults.scala:375)
at scala.tools.nsc.Global$$anon$1.transformNamedApplication(Global.scala:450)
at scala.tools.nsc.typechecker.NamesDefaults$class.transformNamedApplication(NamesDefaults.scala:326)
at scala.tools.nsc.Global$$anon$1.transformNamedApplication(Global.scala:450)
at scala.tools.nsc.typechecker.Typers$Typer.tryNamesDefaults$1(Typers.scala:3298)
at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:3367)
at scala.tools.nsc.typechecker.Typers$Typer.tryNamesDefaults$1(Typers.scala:3353)
at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:3367)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$tryTypedApply$1$1.apply(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$tryTypedApply$1$1.apply(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer.silent(Typers.scala:689)
at scala.tools.nsc.typechecker.Typers$Typer.tryTypedApply$1(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer.normalTypedApply$1(Typers.scala:4449)
at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:4484)
at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5242)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5259)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typedArg(Typers.scala:3094)
at scala.tools.nsc.typechecker.PatternTypers$PatternTyper$class.typedArgWithFormal$1(PatternTypers.scala:112)
at scala.tools.nsc.typechecker.PatternTypers$PatternTyper$$anonfun$2.apply(PatternTypers.scala:115)
at scala.tools.nsc.typechecker.PatternTypers$PatternTyper$$anonfun$2.apply(PatternTypers.scala:115)
at scala.runtime.Tuple2Zipped$$anonfun$map$extension$1.apply(Tuple2Zipped.scala:42)
at scala.runtime.Tuple2Zipped$$anonfun$map$extension$1.apply(Tuple2Zipped.scala:40)
at scala.collection.immutable.List.foreach(List.scala:381)
at scala.runtime.Tuple2Zipped$.map$extension(Tuple2Zipped.scala:40)
at scala.tools.nsc.typechecker.PatternTypers$PatternTyper$class.typedArgsForFormals(PatternTypers.scala:115)
at scala.tools.nsc.typechecker.Typers$Typer.typedArgsForFormals(Typers.scala:107)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$handleMonomorphicCall$1(Typers.scala:3384)
at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:3409)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$tryTypedApply$1$1.apply(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$tryTypedApply$1$1.apply(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer.silent(Typers.scala:676)
at scala.tools.nsc.typechecker.Typers$Typer.tryTypedApply$1(Typers.scala:4404)
at scala.tools.nsc.typechecker.Typers$Typer.normalTypedApply$1(Typers.scala:4449)
at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:4484)
at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5242)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5259)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typedAssign$1(Typers.scala:4136)
at scala.tools.nsc.typechecker.Typers$Typer.typedOutsidePatternMode$1(Typers.scala:5223)
at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5252)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5259)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typedBlock(Typers.scala:2341)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedOutsidePatternMode$1$1.apply(Typers.scala:5217)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedOutsidePatternMode$1$1.apply(Typers.scala:5217)
at scala.tools.nsc.typechecker.Typers$Typer.typedOutsidePatternMode$1(Typers.scala:5216)
at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5252)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5259)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:5504)
at scala.tools.nsc.typechecker.Typers$Typer.typedDefDef(Typers.scala:2167)
at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5207)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5258)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5351)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:2977)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$60.apply(Typers.scala:3081)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$60.apply(Typers.scala:3081)
at scala.collection.immutable.List.loop$1(List.scala:172)
at scala.collection.immutable.List.mapConserve(List.scala:188)
at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3081)
at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1880)
at scala.tools.nsc.typechecker.Typers$Typer.typedClassDef(Typers.scala:1721)
at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5208)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5258)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5351)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:2977)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$60.apply(Typers.scala:3081)
at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$60.apply(Typers.scala:3081)
at scala.collection.immutable.List.loop$1(List.scala:172)
at scala.collection.immutable.List.mapConserve(List.scala:188)
at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3081)
at scala.tools.nsc.typechecker.Typers$Typer.typedPackageDef$1(Typers.scala:4918)
at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5211)
at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5258)
at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5295)
at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5322)
at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5269)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5273)
at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5347)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:102)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:428)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:419)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:428)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:94)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:93)
at scala.collection.Iterator$class.foreach(Iterator.scala:743)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1195)
at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:93)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1338)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1325)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1320)
at scala.tools.nsc.Global$Run.compile(Global.scala:1418)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:116)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:95)
at xsbt.CompilerInterface.run(CompilerInterface.scala:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:47)
at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply$mcV$sp(AggressiveCompile.scala:97)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:97)
at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:97)
at sbt.compiler.AggressiveCompile.sbt$compiler$AggressiveCompile$$timed(AggressiveCompile.scala:162)
at sbt.compiler.AggressiveCompile$$anonfun$3.compileScala$1(AggressiveCompile.scala:96)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:139)
at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:86)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:38)
at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:36)
at sbt.inc.IncrementalCommon.cycle(IncrementalCommon.scala:31)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:39)
at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:38)
at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:66)
at sbt.inc.Incremental$.compile(Incremental.scala:38)
at sbt.inc.IncrementalCompile$.apply(Compile.scala:26)
at sbt.compiler.AggressiveCompile.compile2(AggressiveCompile.scala:153)
at sbt.compiler.AggressiveCompile.compile1(AggressiveCompile.scala:70)
at sbt.compiler.AggressiveCompile.apply(AggressiveCompile.scala:45)
at sbt.Compiler$.apply(Compiler.scala:74)
at sbt.Compiler$.apply(Compiler.scala:65)
at sbt.Defaults$.sbt$Defaults$$compileTaskImpl(Defaults.scala:777)
at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:769)
at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:769)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:235)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
编辑：在删除并注释掉许多文件后，我将其简化为：
case class A(x: String)
case class B(a: A, y: String)
class C(var b: B) {
def a = b.a
b.copy(a = a.copy())
}
Edit2：我能说的最好的是，没有一个好的选择，我要继续前进，我为这个问题提交了错误报告（SI-9035）。如果有人知道执行此操作的选项/方法，请发布答案！与此同时，我将继续使用自 2.6 以来一直使用的方法：擦除文件并注释掉行，直到我将其简化为最小示例并提交错误报告。感谢您的想法。
在这种情况下
，-verbose表示它已完成阶段packageobjects，-Xshow-phases表示typer是下一个。（解析器报告它刚刚解析的内容。
-Ytyper-debug发出大量通常难以理解的输出，但显示了正在进行类型检查的内容。
这些信息至少可以帮助您的下一个搜索或 gitter 问题。
像这样：
| | |-- b.copy(a = a.copy()) EXPRmode (site: method f in C)
| | | |-- b.copy BYVALmode-EXPRmode-FUNmode-POLYmode (silent: method f in C)
| | | | |-- b EXPRmode-POLYmode-QUALmode (silent: method f in C)
| | | | | -> nope.B
| | | | -> (a: nope.A, y: String)nope.B
| | | |-- qual$1 EXPRmode-POLYmode-QUALmode (silent: method f in C)
| | | | -> qual$1.type (with underlying type nope.B)
| | | |-- (a: nope.A, y: String)nope.B EXPRmode-FUNmode-POLYmode-TAPPmode (silent: method f in C)
| | | | -> (a: nope.A, y: String)nope.B
| | | |-- a = a.copy() : pt=nope.A EXPRmode (silent: method f in C)
| | | | |-- a EXPRmode-LHSmode (silent: method f in C)
| | | | | -> nope.A
| | | | |-- C.this.a_$eq(a.copy()) : pt=nope.A EXPRmode (silent: method f in C)
| | | | | |-- C.this.a_$eq BYVALmode-EXPRmode-FUNmode-POLYmode (silent: method f in C)
| | | | | | -> <error>
| | | | | |-- a.copy() : pt=<error> EXPRmode (silent: method f in C)
| | | | | | |-- a.copy BYVALmode-EXPRmode-FUNmode-POLYmode (silent: method f in C)
| | | | | | | |-- a EXPRmode-POLYmode-QUALmode (silent: method f in C)
| | | | | | | | -> nope.A
| | | | | | | -> (x: String)nope.A
| | | | | | |-- qual$2 EXPRmode-POLYmode-QUALmode (silent: method f in C)
| | | | | | | -> qual$2.type (with underlying type nope.A)
| | | | | | |-- (x: String)nope.A EXPRmode-FUNmode-POLYmode-TAPPmode (silent: method f in C)
| | | | | | | -> (x: String)nope.A
| | | | | | -> nope.A
| | | | | -> <error>
| | | | -> <error>
error: java.lang.NullPointerException
at scala.tools.nsc.typechecker.Typers$Typer.noExpectedType$1(Typers.scala:3464)
可能会引导您搜索任何带有"命名参数"的错误，例如这个打开的错误;不是您的崩溃者，而是类似的玩家。
当编译器"中止"时，它提供的信息比完全崩溃时更有用。