Handle correctly cases where codepoint_width returns -1

Fixes #972

1 files changed, 1 insertions, 1 deletions

diff --git a/src/string.hh b/src/string.hh
index d7e39ff9..6fd2f5fb 100644
--- a/src/string.hh
+++ b/src/string.hh
@@ -114,7 +114,7 @@ public:
     explicit String(Codepoint cp, ColumnCount count)
     {
         kak_assert(count % codepoint_width(cp) == 0);
-        int cp_count = (int)(count / codepoint_width(cp));
+        int cp_count = (int)(count / std::max(codepoint_width(cp), 1_col));
         reserve(utf8::codepoint_size(cp) * cp_count);
         while (cp_count-- > 0)
             utf8::dump(std::back_inserter(*this), cp);