[PDB] Local variables names are not recognized

[SmileyAG]

Describe the bug

Here is CBasePlayer::Jump function from source code of the project on the basis of which another project was made that is shown in the screenshot below: https://github.com/HLSources/Paranoia/blob/c2d8018e3fa9de209ba76c0bbe8491bc09d8d797/code_src/dlls/player.cpp#L1892

In the screenshot you can clearly see the absolute similarity of the names of local variables in the result from IDA decompiler shown in the screenshot in comparison with the provided source code, so this data indeed matches. Meanwhile, Ghidra cannot recognize local variable names from a PDB file.

To Reproduce Steps to reproduce the behavior:

• Import any binary and its .pdb into Ghidra for analysis, simply enough. Default analysis options were used.

Screenshots

Attachments

Get from #6463

Environment (please complete the following information):

• OS: [Windows 10, 64 bit]
• Java Version: OpenJDK Temurin 21.0.5+11-LTS
• Ghidra Version: [11.2]
• Ghidra Origin: [official GitHub distro]

[ghizard]

Thank you for submitting this as a separate issue. As indicated in #6463, the setting of local variables is a tough issue due to the Decompiler transformations, but it is a very important issue. I've kept the naming local variable and parameters in tight association, but recently had new ideas for how to tackle the parameters part of the problem.

I believe that both of these might play a part in #7101. I will discuss more about this in that issue.