ROB: Handle zero height fonts when extracting text (#3075)

Closes #3074.

Author: blushingpenguin

pypdf/_text_extraction/_layout_mode/_fixed_width_page.py

@@ -365,8 +365,9 @@ def fixed_width_page(
     last_y_coord = 0
     for y_coord, line_data in ty_groups.items():
         if space_vertically and lines:
-            blank_lines = (
-                int(abs(y_coord - last_y_coord) / (line_data[0]["font_height"] * font_height_weight)) - 1
+            fh = line_data[0]["font_height"]
+            blank_lines = 0 if fh == 0 else (
+                int(abs(y_coord - last_y_coord) / (fh * font_height_weight)) - 1
             )
             lines.extend([""] * blank_lines)
         line = ""

tests/test_text_extraction.py

@@ -320,3 +320,14 @@ def test_iss3060():
     # pypdf.errors.PdfReadError: font not set: is PDF missing a Tf operator?
     txt = reader.pages[0].extract_text(extraction_mode="layout")
     assert txt.startswith(" *******")
+
+
+@pytest.mark.enable_socket
+def test_iss3074():
+    """Test for not throwing 'ZeroDivisionError: float division by zero'"""
+    url = "https://github.com/user-attachments/files/18533211/test-anon.pdf"
+    name = "iss3074.pdf"
+    reader = PdfReader(BytesIO(get_data_from_url(url, name=name)))
+    # pypdf.errors.PdfReadError: ZeroDivisionError: float division by zero
+    txt = reader.pages[0].extract_text(extraction_mode="layout")
+    assert txt.strip().startswith("AAAAAA")