[Bug] Pathspec matching breaks the add command

The following: git add -u :\(glob,attr:-someAttr\):src/** Produces an error that, according to the source code, should never be visible to the user. This attribute/pathspec *should* be supported according to the documentation provided by git: fatal: BUG:builtin/add.c:498: unsupported magic 40

Gitattributes not properly supported with add command

The following: git add -u :\(glob,attr:-someAttr\):src/** Produces an error that, according to the source code, should never be visible to the user. This attribute/pathspec *should* be supported according to the documentation provided by git: fatal: BUG:builtin/add.c:498: unsupported magic 40