System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.59

Blender Version
Broken: version: 3.3.0 Alpha, branch: temp-viewport-compositor-merge, commit date: 2022-06-28 11:06, hash: rB3de2575ffb23
Worked: 3.3.0 Alpha, branch: master, commit date: 2022-07-14 22:44, hash: rB0e9367fc29bc

Short description of error
Mix shader causes the material to be pink

I was unsure if I should report this bug or not, since the master had it fixed while the compositor is a bit outdated, however I didn't seem to find any task related to it so just to make sure im reporting it.