Identifier not available, possibly due to compiler optimizations, but optimization is off

Avatar
WildRikku
Created

Hi there,

this is in Rider 2026.1 with C++ in Unreal Engine 5 on Windows. I can't figure out how to turn off compiler optimizations so I see all fields when debugging. I frequently stumble into “identifier <id> not available, possibly due to compiler optimizations”, but I have OptimizeCode = CodeOptimization.Never; in my Projectname.Build.cs and Rider uses the DebugGame configuration for the Editor target. What did I miss? I'd appreciate some help.

Votes

0

Share

2 comments
Avatar
Kirill Filin
Created

WildRikku depending on your project configuration, you might also need to disable PCH in the module you are debugging. Meaning both options should be present in your *Build.cs:

PCHUsage = PCHUsageMode.NoPCHs;
OptimizeCode = CodeOptimization.Never;

If the issue persists, please collect additional information and share it with us:

  • Enable CppDebugger trace scenario via Help | Diagnostic Tools | Choose Trace Scenario
  • Reproduce the issue
  • Invoke Help | Report a Bug and attach the logs when prompted. When filing an issue, please note the symbol name you are trying to evaluate
  • Disable all trace scenarios under Help | Diagnostic Tools | Choose Trace Scenario
0
Avatar
WildRikku
Created

Thank you. I have created a bug ticket since unfortunately, setting PCHUsageMode and rebuilding did not help either.

https://youtrack.jetbrains.com/issue/RIDER-138486/Identifier-not-available-possibly-due-to-compiler-optimizations-but-optimization-is-off

0

Please sign in to leave a comment.