Update upstream source from tag 'upstream/2.8.1'

Update to upstream version '2.8.1'
with Debian dir 0b3d620c27dcd0db30ac7d6f307d708b9f652c99

5 files changed, 20 insertions, 3 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d93da95..c0c4a39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,10 @@
-## Unreleased
+##  Unreleased
+
+##  [2.8.1] 2019-01-21
+### Fixed
+- Fixed error if excelx's cell have empty children [487](https://github.com/roo-rb/roo/pull/487)
+
+##  [2.8.0] 2019-01-18
 ### Fixed
 - Fixed inconsistent column length for CSV [375](https://github.com/roo-rb/roo/pull/375)
 - Fixed formatted_value with `%` for Excelx [416](https://github.com/roo-rb/roo/pull/416)
diff --git a/lib/roo/excelx/sheet_doc.rb b/lib/roo/excelx/sheet_doc.rb
index 8b0c686..2b3aa39 100755
--- a/lib/roo/excelx/sheet_doc.rb
+++ b/lib/roo/excelx/sheet_doc.rb
@@ -120,7 +120,7 @@ module Roo
           end
         end
 
-        create_empty_cell(coordinate)
+        create_empty_cell(coordinate, empty_cell)
       end
 
       def create_empty_cell(coordinate, empty_cell)
diff --git a/lib/roo/version.rb b/lib/roo/version.rb
index 7fd96d7..625e495 100644
--- a/lib/roo/version.rb
+++ b/lib/roo/version.rb
@@ -1,3 +1,3 @@
 module Roo
-  VERSION = "2.8.0"
+  VERSION = "2.8.1"
 end
diff --git a/spec/lib/roo/excelx/sheet_doc_spec.rb b/spec/lib/roo/excelx/sheet_doc_spec.rb
new file mode 100644
index 0000000..3dc3e93
--- /dev/null
+++ b/spec/lib/roo/excelx/sheet_doc_spec.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe Roo::Excelx::SheetDoc do
+  subject(:blank_children) { Roo::Excelx.new("test/files/blank_children.xlsx") }
+
+  example "#last_row" do
+    expect(subject.last_row).to eq 3
+  end
+end
diff --git a/test/files/blank_children.xlsx b/test/files/blank_children.xlsx
new file mode 100644
index 0000000..a495849
--- /dev/null
+++ b/test/files/blank_children.xlsx