const regexp/syntax.ErrNestingDepth

4 uses

	regexp/syntax (current package)
		parse.go#L47: 	ErrNestingDepth          ErrorCode = "expression nests too deeply"
		parse.go#L269: 		panic(ErrNestingDepth)
		parse.go#L900: 		case ErrNestingDepth:
		parse.go#L901: 			err = &Error{Code: ErrNestingDepth, Expr: s}