java.lang.ArrayIndexOutOfBoundsException when using LocalDateDoubleTimeSeries.union()

[jacbop]

Found bug in com.opengamma.margining.core.data.fixing.MarginFixingSeriesUtils when using union().

// getting java.lang.ArrayIndexOutOfBoundsException: 31 when creating the combined dense series using this operator // return rawFixings.union(extrapolatedTimeSeries, (v1, v2) -> v1 + v2);

This is a placeholder, will attempt to reproduce in strata only context.

java.lang.ArrayIndexOutOfBoundsException: 31

    at com.opengamma.strata.collect.timeseries.DenseLocalDateDoubleTimeSeries.lambda$of$0(DenseLocalDateDoubleTimeSeries.java:219)
    at com.opengamma.strata.collect.timeseries.DenseLocalDateDoubleTimeSeries$$Lambda$66/1043351526.accept(Unknown Source)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
    at java.util.TreeMap$EntrySpliterator.forEachRemaining(TreeMap.java:2965)
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
    at com.opengamma.strata.collect.timeseries.DenseLocalDateDoubleTimeSeries.of(DenseLocalDateDoubleTimeSeries.java:219)
    at com.opengamma.strata.collect.timeseries.LocalDateDoubleTimeSeriesBuilder.createDenseSeries(LocalDateDoubleTimeSeriesBuilder.java:293)
    at com.opengamma.strata.collect.timeseries.LocalDateDoubleTimeSeriesBuilder.build(LocalDateDoubleTimeSeriesBuilder.java:288)
    at com.opengamma.strata.collect.timeseries.LocalDateDoubleTimeSeries.union(LocalDateDoubleTimeSeries.java:342)
    at com.opengamma.margining.core.data.fixing.MarginFixingSeriesUtils.extrapolateTimeSeries(MarginFixingSeriesUtils.java:70)
    at com.opengamma.margining.core.data.fixing.MarginFixingSeriesUtilsTest.testInterpolateAndExterpolate(MarginFixingSeriesUtilsTest.java:156)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:696)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:882)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1189)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:348)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:343)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:305)
    at org.testng.SuiteRunner.run(SuiteRunner.java:254)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
    at org.testng.TestNG.run(TestNG.java:1057)
    at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:122)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)