If clang >= 10, don't crash on #pragma clang __debug

Author: MaskRay

src/clang_tu.cc

@@ -160,6 +160,9 @@ buildCompilerInvocation(const std::string &main, std::vector<const char *> args,
   auto &isec = ci->getFrontendOpts().Inputs;
   if (isec.size())
     isec[0] = FrontendInputFile(main, isec[0].getKind(), isec[0].isSystem());
+#if LLVM_VERSION_MAJOR >= 10 // llvmorg-11-init-2414-g75f09b54429
+  ci->getPreprocessorOpts().DisablePragmaDebugCrash = true;
+#endif
   // clangSerialization has an unstable format. Disable PCH reading/writing
   // to work around PCH mismatch problems.
   ci->getPreprocessorOpts().ImplicitPCHInclude.clear();