Hard to debug issue with commands not getting properly parsed in MSVC 2022 release builds

[SaschaWillems]

We use this library for command line parsing in our Vulkan samples at https://github.com/KhronosGroup/Vulkan-Samples

I noticed that that commands with a value like this:

--shading-language hlsl

No longer work with MSVC in release builds only and we get an ExtrasError instead:

CLI11 Parse Error: [sample] The following arguments were not expected: hlsl --shading-language

A debug or release with debug info build works fine.

I tried to debug, which is kinda hard if it works in all builds with debug information and I'm out of clues. Updating to the latest version of CLI11 didn't help either.

Any ideas as to why this could happen, and why only in release mode?

[phlptp]

are you using the main release or the latest tagged release?

[SaschaWillems]

We are using a recent commit from the main branch.

[phlptp]

Any chance you can bisect the commits and figure out which merge causes the issue?

[SaschaWillems]

Bisecting might take some time, but I went back as far as tag v1.9.0 and the issue still persists. So I guess this is an issue on our side, but that code was written by a different maintainer. Any hints as to where I could look for the cause of that problem only showing up in release?

[phlptp]

If it predates 2.0 then that is a different matter, I was worried one of the recent fixes changed something. I will have to dig into it a bit more on exactly how you are using things. Do you have the exact compiler flags you are using to generate the error?