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    Thrown to indicate that a method has been passed an illegal or inappropriate argument. Make sure your getter and setter methods have the same return/parameter types (that is, String for String, Integer for Integer).

Solutions on the web

via YouTrack by Unknown author, 1 year ago
java.lang.IllegalArgumentException: Can not set int field jetbrains.mps.baseLanguage.unitTest.execution.settings.JUnitSettings_Configuration$MyState.myRunType to null value
via GitHub by friedfilibuster
, 1 year ago
java.lang.RuntimeException: Cannot set value for field CONTINUATION_INDENT_SIZE
java.lang.IllegalArgumentException: Can not set int field jetbrains.mps.baseLanguage.unitTest.execution.settings.JUnitSettings_Configuration$MyState.myRunType to null value	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)	at sun.reflect.UnsafeIntegerFieldAccessorImpl.set(UnsafeIntegerFieldAccessorImpl.java:80)	at java.lang.reflect.Field.set(Field.java:758)	at com.intellij.util.xmlb.FieldAccessor.write(FieldAccessor.java:51)	at com.intellij.util.xmlb.OptionTagBinding.deserialize(OptionTagBinding.java:125)	at com.intellij.util.xmlb.BeanBinding._deserializeInto(BeanBinding.java:167)	at com.intellij.util.xmlb.BeanBinding.deserializeInto(BeanBinding.java:116)	at com.intellij.util.xmlb.XmlSerializer.deserializeInto(XmlSerializer.java:103)	at jetbrains.mps.baseLanguage.unitTest.execution.settings.JUnitSettings_Configuration.readExternal(JUnitSettings_Configuration.java:67)	at jetbrains.mps.execution.configurations.implementation.plugin.plugin.JUnitTests_Configuration.readExternal(JUnitTests_Configuration.java:71)	at com.intellij.execution.impl.RunnerAndConfigurationSettingsImpl.readExternal(RunnerAndConfigurationSettingsImpl.java:231)	at com.intellij.execution.impl.RunManagerImpl.loadConfiguration(RunManagerImpl.java:789)	at com.intellij.execution.impl.RunManagerImpl.readExternal(RunManagerImpl.java:676)	at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initJdomExternalizable(ComponentStoreImpl.java:158)	at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.access$100(ComponentStoreImpl.java:58)	at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:85)	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:896)	at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:78)	at com.intellij.openapi.project.impl.ProjectImpl.initializeComponent(ProjectImpl.java:207)	at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:565)	at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:609)	at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:236)	at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:223)	at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:210)	at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)	at com.intellij.openapi.components.impl.ComponentManagerImpl.createComponent(ComponentManagerImpl.java:124)	at com.intellij.openapi.components.impl.ComponentManagerImpl.createComponents(ComponentManagerImpl.java:115)	at com.intellij.openapi.components.impl.ComponentManagerImpl.init(ComponentManagerImpl.java:86)	at com.intellij.openapi.project.impl.ProjectImpl.init(ProjectImpl.java:297)	at com.intellij.openapi.project.impl.ProjectManagerImpl.initProject(ProjectManagerImpl.java:300)	at com.intellij.openapi.project.impl.ProjectManagerImpl.access$700(ProjectManagerImpl.java:86)	at com.intellij.openapi.project.impl.ProjectManagerImpl$12.compute(ProjectManagerImpl.java:611)	at com.intellij.openapi.project.impl.ProjectManagerImpl$12.compute(ProjectManagerImpl.java:607)	at com.intellij.openapi.progress.impl.ProgressManagerImpl$5.run(ProgressManagerImpl.java:381)	at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:621)	at com.intellij.openapi.progress.impl.ProgressManagerImpl$7.run(ProgressManagerImpl.java:422)	at com.intellij.openapi.progress.impl.ProgressManagerImpl$3.run(ProgressManagerImpl.java:194)	at com.intellij.openapi.progress.impl.ProgressManagerImpl.registerIndicatorAndRun(ProgressManagerImpl.java:281)	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:233)	at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:181)	at com.intellij.openapi.application.impl.ApplicationImpl$10$1.run(ApplicationImpl.java:641)	at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:406)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:744)	at org.jetbrains.ide.PooledThreadExecutor$1$1.run(PooledThreadExecutor.java:56)