2 files changed, 9 insertions, 0 deletions
diff --git a/src/util/TextTable.cpp b/src/util/TextTable.cpp
index 618f7b7b..53014aa4 100644
--- a/src/util/TextTable.cpp
+++ b/src/util/TextTable.cpp
@@ -32,6 +32,7 @@ TextTable::add_heading(const std::string& text)
   Cell cell(text);
   cell.m_heading = true;
   m_rows.push_back({cell});
+  m_columns = std::max(m_columns, size_t(1));
 }
 
 void
@@ -86,6 +87,8 @@ TextTable::render() const
 
   std::string result;
   for (const auto& row : m_rows) {
+    ASSERT(column_widths.size() >= row.size());
+
     std::string r;
     bool first = true;
     for (size_t i = 0; i < row.size(); ++i) {
diff --git a/unittest/test_util_TextTable.cpp b/unittest/test_util_TextTable.cpp
index 36240731..1a996c04 100644
--- a/unittest/test_util_TextTable.cpp
+++ b/unittest/test_util_TextTable.cpp
@@ -33,6 +33,12 @@ TEST_CASE("TextTable")
     CHECK(table.render() == "");
   }
 
+  SUBCASE("only a heading")
+  {
+    table.add_heading("heading");
+    CHECK(table.render() == "heading\n");
+  }
+
   SUBCASE("1x1")
   {
     table.add_row({"a"});