Resolving symbol with incorrect flags

Hi,

I am getting an assertion failure such as this while attempting to
resolve a symbol:

Assertion failed: I->second == KV.second.getFlags() && "Resolving
symbol with incorrect flags", file
C:\work\github\llvm-9.0.0.src\lib\ExecutionEngine\Orc\Core.cpp, line
384

The code that triggers this:

  llvm::Expected<llvm::JITEvaluatedSymbol> findSymbol(llvm::StringRef Name) {
    return ES->lookup({&ES->getMainJITDylib()}, (*Mangle)(Name.str()));
  }

What does this assertion failure mean?

Thanks and Regards
Dibyendu