AssessmentAnalyzer tries to modify read only models

[alexanderpann]

There are many exceptions like this on the CI:

jetbrains.mps.smodel.DefaultSModelDescriptor - Attempt to change a model with read-only data source; subsequent save() would fail!
06:27:03     [launchtests] java.lang.Throwable
06:27:03     [launchtests]   at jetbrains.mps.smodel.DefaultSModelDescriptor.setChanged(DefaultSModelDescriptor.java:234)
06:27:03     [launchtests]   at jetbrains.mps.smodel.event.ModelEventDispatch.markEditableModelChanged(ModelEventDispatch.java:189)
06:27:03     [launchtests]   at jetbrains.mps.smodel.event.ModelEventDispatch.fireNodeRemove(ModelEventDispatch.java:154)
06:27:03     [launchtests]   at jetbrains.mps.smodel.AttachedNodeOwner.fireNodeRemove(AttachedNodeOwner.java:321)
06:27:03     [launchtests]   at jetbrains.mps.smodel.SNode.removeChild(SNode.java:212)
06:27:03     [launchtests]   at jetbrains.mps.lang.smodel.generator.smodelAdapter.MutableChildrenList.remove(MutableChildrenList.java:39)
06:27:03     [launchtests]   at jetbrains.mps.lang.smodel.generator.smodelAdapter.AbstractMutableChildrenList.removeAll(AbstractMutableChildrenList.java:89)
06:27:03     [launchtests]   at jetbrains.mps.lang.smodel.generator.smodelAdapter.AbstractMutableChildrenList.clear(AbstractMutableChildrenList.java:104)
06:27:03     [launchtests]   at jetbrains.mps.internal.collections.runtime.AbstractCollectionSequence.clear(AbstractCollectionSequence.java:88)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.AssessmentQuery__BehaviorDescriptor.executeQuery_id4WjNWxKFbeJ(AssessmentQuery__BehaviorDescriptor.java:109)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.AssessmentQuery__BehaviorDescriptor.invokeSpecial0(AssessmentQuery__BehaviorDescriptor.java:169)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invokeSpecial(BaseBHDescriptor.java:393)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invoke(BaseBHDescriptor.java:294)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke0(SMethodImpl.java:153)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke(SMethodImpl.java:128)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.Assessment__BehaviorDescriptor.update_id4WjNWxKKBRM(Assessment__BehaviorDescriptor.java:52)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.Assessment__BehaviorDescriptor.invokeSpecial0(Assessment__BehaviorDescriptor.java:85)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invokeSpecial(BaseBHDescriptor.java:393)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invoke(BaseBHDescriptor.java:294)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke0(SMethodImpl.java:153)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke(SMethodImpl.java:128)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.Assessment__BehaviorDescriptor.update_id3jNX2XuLy_p(Assessment__BehaviorDescriptor.java:49)
06:27:03     [launchtests]   at c.m.core.base//com.mbeddr.core.base.behavior.Assessment__BehaviorDescriptor.invokeSpecial0(Assessment__BehaviorDescriptor.java:82)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invokeSpecial(BaseBHDescriptor.java:393)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.BaseBHDescriptor.invoke(BaseBHDescriptor.java:294)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke0(SMethodImpl.java:153)
06:27:03     [launchtests]   at jetbrains.mps.core.aspects.behaviour.SMethodImpl.invoke(SMethodImpl.java:128)
06:27:03     [launchtests]   at t.i.expr.os//test.in.expr.os.assessmentUtils.AssessmentAnalyzer.checkCoverage(AssessmentAnalyzer.java:47)
06:27:03     [launchtests]   at t.i.expr.os//test.in.expr.os.records.ExecuteInterpreterCoverageForRecords_Test$TestBody.lambda$test_checkCoverageRatio$0(ExecuteInterpreterCoverageForRecords_Test.java:56)
06:27:03     [launchtests]   at j.m.l.test.runtime//jetbrains.mps.lang.test.runtime.BaseTestBody.lambda$runWithinCommand$1(BaseTestBody.java:161)

[arimer]

Model access comes from this test: http://127.0.0.1:63320/node?ref=r%3Afcb91210-c6db-4de0-81c0-ca99e48fd25a%28test.in.expr.os.records%40tests%29%2F4259196335511579780