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When I rebuild the index of my project I get the following entry in the error log: Error while parsing name/of/source.cpp java.lang.NullPointerException at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecRangeBasedFor.isEqual(ExecRangeBasedFor.java:103) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecRangeBasedFor.loopOverObject(ExecRangeBasedFor.java:85) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecRangeBasedFor.executeForFunctionCall(ExecRangeBasedFor.java:160) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalUtil.executeStatement(EvalUtil.java:94) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecCompoundStatement.executeForFunctionCall(ExecCompoundStatement.java:63) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalUtil.executeStatement(EvalUtil.java:94) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecIf.executeForFunctionCall(ExecIf.java:52) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalUtil.executeStatement(EvalUtil.java:94) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecCompoundStatement.executeForFunctionCall(ExecCompoundStatement.java:63) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.evaluateFunctionBody(EvalFunctionCall.java:350) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.getValue(EvalFunctionCall.java:187) at org.eclipse.cdt.internal.core.dom.parser.cpp.CPPVariable.computeInitialValue(CPPVariable.java:271) at org.eclipse.cdt.internal.core.dom.parser.cpp.CPPVariable.getInitialValue(CPPVariable.java:248) at org.eclipse.cdt.internal.core.pdom.PDOMWriter.resolveNames(PDOMWriter.java:441) at org.eclipse.cdt.internal.core.pdom.PDOMWriter.addSymbols(PDOMWriter.java:284) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.writeToIndex(AbstractIndexerTask.java:1295) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.parseFile(AbstractIndexerTask.java:1107) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.parseLinkage(AbstractIndexerTask.java:944) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:572) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMRebuildTask.run(PDOMRebuildTask.java:94) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Unfortunately, I cannot publish the source code file. Is there a way to identify which parts of the source code cause the exception?
It looks like a ranged-based for inside a constexpr function. It's hard to tell the source of the null without sample code. EvalUtil.getValuePair is one that's suspicious since it initializes with ICPPEvaluation updateable = null; and stores it in a pair for use later.
Created attachment 286799 [details] test code to reproduce The hint with the range-based loop in a constexpr was indeed helpful. I was able to isolate the code. If I comment out the line marked with "ERROR WHILE PARSING" then everything is fine.
I was able to reduce it further so that it doesn't depend on std includes struct array { typedef const int *const_iterator; int __elems_[1]; const constexpr int* data() const { return __elems_; } constexpr const_iterator begin() const { return const_iterator(data()); } constexpr const_iterator end() const { return const_iterator(data() + 1); } const constexpr int& operator[](int __n) const { return __elems_[__n]; } }; static inline constexpr auto func() { const array a = { }; for (auto &s : a) (void) s; return 0; } static constexpr auto i = func(); int main() { return i; }
