diff --git a/markdown/extensions/footnotes.py b/markdown/extensions/footnotes.py
index 46bb93c3..4bfd827b 100644
--- a/markdown/extensions/footnotes.py
+++ b/markdown/extensions/footnotes.py
@@ -302,20 +302,22 @@ def detectTabbed(self, blocks: list[str]) -> list[str]:
while blocks:
if blocks[0].startswith(' '*4):
block = blocks.pop(0)
+ detabbed_block = self.detab(block)
# Check for new footnotes within this block and split at new footnote.
- m = self.RE.search(block)
+ m = self.RE.search(detabbed_block)
if m:
# Another footnote exists in this block.
# Any content before match is continuation of this footnote, which may be lazily indented.
- before = block[:m.start()].rstrip('\n')
- fn_blocks.append(self.detab(before))
+ before = detabbed_block[:m.start()].rstrip('\n')
+ if before:
+ fn_blocks.append(before)
# Add back to blocks everything from beginning of match forward for next iteration.
- blocks.insert(0, block[m.start():])
+ blocks.insert(0, detabbed_block[m.start():])
# End of this footnote.
break
else:
# Entire block is part of this footnote.
- fn_blocks.append(self.detab(block))
+ fn_blocks.append(detabbed_block)
else:
# End of this footnote.
break
diff --git a/tests/test_syntax/extensions/test_footnotes.py b/tests/test_syntax/extensions/test_footnotes.py
index 896e1fcd..6a8793f1 100644
--- a/tests/test_syntax/extensions/test_footnotes.py
+++ b/tests/test_syntax/extensions/test_footnotes.py
@@ -676,3 +676,99 @@ def test_footnote_id_with_special_chars(self):
'\n'
''
)
+
+ def test_footnote_indented_nested_definition(self):
+ """Test an indented footnote definition nested within another footnote.
+
+ The nested definition used to be silently dropped from the output.
+ """
+
+ self.assertMarkdownRenders(
+ self.dedent(
+ """
+ Main[^1].
+
+ [^1]: First
+
+ [^2]: Second
+ """
+ ),
+ 'Main.
\n'
+ ''
+ )
+
+ def test_footnote_indented_nested_definition_with_reference(self):
+ """Test an indented nested definition that is also referenced.
+
+ The reference used to link to a `#fn:2` anchor that never existed.
+ """
+
+ self.assertMarkdownRenders(
+ self.dedent(
+ """
+ Main[^1].
+
+ [^1]: First [^2]
+
+ [^2]: Second
+ """
+ ),
+ 'Main.
\n'
+ ''
+ )
+
+ def test_footnote_indented_nested_definition_after_content(self):
+ """Test an indented nested definition preceded by continuation content."""
+
+ self.assertMarkdownRenders(
+ self.dedent(
+ """
+ Main[^1].
+
+ [^1]: First
+
+ some continuation
+ [^2]: Second
+ """
+ ),
+ 'Main.
\n'
+ ''
+ )