LibMarkdown: Prevent a crash when rendering code blocks to console

When parsing a code block not in a section (in a file without a
heading), the parser would initialize the code block with an
uninitialized (invalid) value for current_section. Accessing this value
would later cause a segmentation fault in render_to_terminal.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Libraries/LibMarkdown/ContainerBlock.cpp b/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
index 99c6f4af64..f137e470d3 100644
--- a/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
+++ b/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
@@ -91,7 +91,7 @@ OwnPtr<ContainerBlock> ContainerBlock::parse(LineIterator& lines)
     NonnullOwnPtrVector<Block> blocks;
 
     StringBuilder paragraph_text;
-    Heading* current_section;
+    Heading* current_section = nullptr;
 
     auto flush_paragraph = [&] {
         if (paragraph_text.is_empty())