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February 16, 2021 04:04
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| package p1 | |
| class Test { | |
| def crash: Unit = { | |
| var box: AnyRef = null | |
| def writeBox(a: AnyRef): Unit = { | |
| box = a | |
| } | |
| writeBox(null) | |
| } | |
| } | |
| after beforeMethodOpt | |
| // access flags 0x1000001 | |
| public crash()V | |
| L0 | |
| LINENUMBER 5 L0 | |
| L1 | |
| LINENUMBER 6 L1 | |
| ACONST_NULL | |
| ASTORE 3 | |
| L2 | |
| NEW scala/runtime/ObjectRef | |
| DUP | |
| ALOAD 3 | |
| INVOKESPECIAL scala/runtime/ObjectRef.<init> (Ljava/lang/Object;)V | |
| ASTORE 4 | |
| GOTO L3 | |
| L4 | |
| L3 | |
| ALOAD 4 | |
| ACONST_NULL | |
| ASTORE 3 | |
| ACONST_NULL | |
| ASTORE 4 | |
| ASTORE 1 | |
| L5 | |
| LINENUMBER 12 L5 | |
| ACONST_NULL | |
| ALOAD 1 | |
| POP | |
| ASTORE 2 | |
| L6 | |
| LINENUMBER 9 L6 | |
| L7 | |
| ALOAD 1 | |
| ALOAD 2 | |
| PUTFIELD scala/runtime/ObjectRef.elem : Ljava/lang/Object; | |
| GOTO L8 | |
| L9 | |
| L8 | |
| LINENUMBER 12 L8 | |
| ACONST_NULL | |
| ASTORE 2 | |
| L10 | |
| RETURN | |
| L11 | |
| LOCALVARIABLE box Lscala/runtime/ObjectRef; L5 L10 1 | |
| LOCALVARIABLE this Lp1/Test; L1 L11 0 | |
| LOCALVARIABLE writeBox$1_a Ljava/lang/Object; L7 L9 2 | |
| LOCALVARIABLE create_e Ljava/lang/Object; L2 L4 3 | |
| // signature TU; | |
| // declaration: create_e extends U | |
| MAXSTACK = 4 | |
| MAXLOCALS = 5 | |
| after nullness | |
| // access flags 0x1000001 | |
| public crash()V | |
| L0 | |
| LINENUMBER 5 L0 | |
| L1 | |
| LINENUMBER 6 L1 | |
| ACONST_NULL | |
| ASTORE 3 | |
| L2 | |
| NEW scala/runtime/ObjectRef | |
| DUP | |
| ACONST_NULL | |
| INVOKESPECIAL scala/runtime/ObjectRef.<init> (Ljava/lang/Object;)V | |
| ASTORE 4 | |
| GOTO L3 | |
| L4 | |
| L3 | |
| ALOAD 4 | |
| ACONST_NULL | |
| POP | |
| ACONST_NULL | |
| ASTORE 4 | |
| ASTORE 1 | |
| L5 | |
| LINENUMBER 12 L5 | |
| ACONST_NULL | |
| ALOAD 1 | |
| POP | |
| ASTORE 2 | |
| L6 | |
| LINENUMBER 9 L6 | |
| L7 | |
| ALOAD 1 | |
| ACONST_NULL | |
| PUTFIELD scala/runtime/ObjectRef.elem : Ljava/lang/Object; | |
| GOTO L8 | |
| L9 | |
| L8 | |
| LINENUMBER 12 L8 | |
| ACONST_NULL | |
| POP | |
| L10 | |
| RETURN | |
| L11 | |
| LOCALVARIABLE box Lscala/runtime/ObjectRef; L5 L10 1 | |
| LOCALVARIABLE this Lp1/Test; L1 L11 0 | |
| LOCALVARIABLE writeBox$1_a Ljava/lang/Object; L7 L9 2 | |
| LOCALVARIABLE create_e Ljava/lang/Object; L2 L4 3 | |
| // signature TU; | |
| // declaration: create_e extends U | |
| MAXSTACK = 4 | |
| MAXLOCALS = 5 | |
| after boxUnbox | |
| // access flags 0x1000001 | |
| public crash()V | |
| L0 | |
| LINENUMBER 5 L0 | |
| L1 | |
| LINENUMBER 6 L1 | |
| ACONST_NULL | |
| ASTORE 3 | |
| L2 | |
| ACONST_NULL | |
| ASTORE 5 | |
| GOTO L3 | |
| L4 | |
| L3 | |
| ACONST_NULL | |
| POP | |
| ACONST_NULL | |
| ASTORE 4 | |
| L5 | |
| LINENUMBER 12 L5 | |
| ACONST_NULL | |
| POP | |
| ASTORE 2 | |
| L6 | |
| LINENUMBER 9 L6 | |
| L7 | |
| ACONST_NULL | |
| ASTORE 5 | |
| GOTO L8 | |
| L9 | |
| L8 | |
| LINENUMBER 12 L8 | |
| ACONST_NULL | |
| POP | |
| L10 | |
| RETURN | |
| L11 | |
| LOCALVARIABLE box Lscala/runtime/ObjectRef; L5 L10 1 | |
| LOCALVARIABLE this Lp1/Test; L1 L11 0 | |
| LOCALVARIABLE writeBox$1_a Ljava/lang/Object; L7 L9 2 | |
| LOCALVARIABLE create_e Ljava/lang/Object; L2 L4 3 | |
| // signature TU; | |
| // declaration: create_e extends U | |
| MAXSTACK = 4 | |
| MAXLOCALS = 6 | |
| /tmp/HashMap.scala:3: error: Error while emitting p1/Test | |
| scala.tools.asm.tree.analysis.AnalyzerException: While processing p1/Test.crash | |
| at scala.tools.nsc.backend.jvm.analysis.AsmAnalyzer.<init>(AsmAnalyzer.scala:31) | |
| at scala.tools.nsc.backend.jvm.analysis.ProdConsAnalyzer.<init>(ProdConsAnalyzer.scala:69) | |
| at scala.tools.nsc.backend.jvm.opt.CopyProp.prodCons$lzycompute$1(CopyProp.scala:115) | |
| at scala.tools.nsc.backend.jvm.opt.CopyProp.prodCons$1(CopyProp.scala:115) | |
| at scala.tools.nsc.backend.jvm.opt.CopyProp.hasNoCons$1(CopyProp.scala:116) | |
| at scala.tools.nsc.backend.jvm.opt.CopyProp.eliminateStaleStoresAndRewriteSomeIntrinsics(CopyProp.scala:139) | |
| at scala.tools.nsc.backend.jvm.opt.LocalOpt.removalRound$2(LocalOpt.scala:316) | |
| at scala.tools.nsc.backend.jvm.opt.LocalOpt.methodOptimizations(LocalOpt.scala:380) | |
| at scala.tools.nsc.backend.jvm.opt.LocalOpt.$anonfun$methodOptimizations$1(LocalOpt.scala:215) | |
| at scala.tools.nsc.backend.jvm.opt.LocalOpt.$anonfun$methodOptimizations$1$adapted(LocalOpt.scala:214) | |
| at scala.collection.IterableOnceOps.foldLeft(IterableOnce.scala:646) | |
| at scala.collection.IterableOnceOps.foldLeft$(IterableOnce.scala:642) | |
| at scala.collection.AbstractIterable.foldLeft(Iterable.scala:919) | |
| at scala.tools.nsc.backend.jvm.opt.LocalOpt.methodOptimizations(LocalOpt.scala:214) | |
| at scala.tools.nsc.backend.jvm.PostProcessor.$anonfun$localOptimizations$1(PostProcessor.scala:129) | |
| at scala.runtime.java8.JFunction0$mcZ$sp.apply(JFunction0$mcZ$sp.scala:17) | |
| at scala.reflect.internal.util.Statistics.timed(Statistics.scala:338) | |
| at scala.tools.nsc.backend.jvm.PostProcessor.localOptimizations(PostProcessor.scala:129) | |
| at scala.tools.nsc.backend.jvm.PostProcessor.sendToDisk(PostProcessor.scala:65) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.$anonfun$postProcessUnit$3(GeneratedClassHandler.scala:126) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.$anonfun$postProcessUnit$3$adapted(GeneratedClassHandler.scala:124) | |
| at scala.collection.immutable.List.foreach(List.scala:333) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.$anonfun$postProcessUnit$2(GeneratedClassHandler.scala:124) | |
| at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18) | |
| at scala.tools.nsc.backend.jvm.PostProcessorFrontendAccess$PostProcessorFrontendAccessImpl.withThreadLocalReporter(PostProcessorFrontendAccess.scala:241) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.$anonfun$postProcessUnit$1(GeneratedClassHandler.scala:124) | |
| at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18) | |
| at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:672) | |
| at scala.concurrent.impl.Promise$Transformation.run(Promise.scala:431) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$SyncWritingClassHandler$$anonfun$$lessinit$greater$1.execute(GeneratedClassHandler.scala:181) | |
| at scala.concurrent.impl.ExecutionContextImpl.execute(ExecutionContextImpl.scala:21) | |
| at scala.concurrent.impl.Promise$Transformation.submitWithValue(Promise.scala:393) | |
| at scala.concurrent.impl.Promise$DefaultPromise.submitWithValue(Promise.scala:302) | |
| at scala.concurrent.impl.Promise$DefaultPromise.dispatchOrAddCallbacks(Promise.scala:276) | |
| at scala.concurrent.impl.Promise$DefaultPromise.map(Promise.scala:146) | |
| at scala.concurrent.Future$.apply(Future.scala:672) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.postProcessUnit(GeneratedClassHandler.scala:120) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$WritingClassHandler.process(GeneratedClassHandler.scala:113) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$GlobalOptimisingGeneratedClassHandler.$anonfun$complete$1(GeneratedClassHandler.scala:93) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$GlobalOptimisingGeneratedClassHandler.$anonfun$complete$1$adapted(GeneratedClassHandler.scala:93) | |
| at scala.collection.immutable.List.foreach(List.scala:333) | |
| at scala.tools.nsc.backend.jvm.GeneratedClassHandler$GlobalOptimisingGeneratedClassHandler.complete(GeneratedClassHandler.scala:93) | |
| at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase.$anonfun$run$1(GenBCode.scala:81) | |
| at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18) | |
| at scala.reflect.internal.util.Statistics.timed(Statistics.scala:338) | |
| at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase.run(GenBCode.scala:78) | |
| at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1515) | |
| at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1499) | |
| at scala.tools.nsc.Global$Run.compileSources(Global.scala:1491) | |
| at scala.tools.nsc.Global$Run.compile(Global.scala:1626) | |
| at scala.tools.nsc.Driver.doCompile(Driver.scala:48) | |
| at scala.tools.nsc.MainClass.doCompile(Main.scala:30) | |
| at scala.tools.nsc.Driver.process(Driver.scala:68) | |
| at scala.tools.nsc.Driver.main(Driver.scala:82) | |
| at scala.tools.nsc.Main.main(Main.scala) | |
| Caused by: scala.tools.asm.tree.analysis.AnalyzerException: Error at instruction 20: Cannot pop operand off an empty stack. | |
| at scala.tools.asm.tree.analysis.Analyzer.analyze(Analyzer.java:296) | |
| at scala.tools.nsc.backend.jvm.analysis.AsmAnalyzer.<init>(AsmAnalyzer.scala:28) | |
| ... 54 more | |
| Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off an empty stack. | |
| at scala.tools.asm.tree.analysis.Frame.pop(Frame.java:258) | |
| at scala.tools.asm.tree.analysis.Frame.execute(Frame.java:333) | |
| at scala.tools.asm.tree.analysis.Analyzer.analyze(Analyzer.java:188) | |
| ... 55 more | |
| class Test { | |
| ^ | |
| 1 error |
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