Unused field not reported in Roslyn build

[jjonescz]

Version Used: b7e891b

Not sure if this is infra or analyzer issue, but I would expect this unused field to generate IDE0052 warning during CI builds:

roslyn/src/Workspaces/Core/Portable/Workspace/ProjectSystem/ProjectSystemProject.cs

Line 32 in b7e891b

private static readonly char[] s_directorySeparator = [Path.DirectorySeparatorChar];

The IDE0052 warning is reported in IDE (both VS and VSCode) but not during builds.

Btw, this field reports the warning during builds if suppressions around it are removed:

roslyn/src/Workspaces/Core/Portable/FindSymbols/FindReferences/FindReferenceCache.cs

Line 63 in b7e891b

private readonly SemanticModel _nullableEnabledSemanticModel;