From 4fa4633c93307bb808c9023570a43dcfdd92e281 Mon Sep 17 00:00:00 2001
From: Aryan Rajesh Ganjoo <51299383+AryanRG@users.noreply.github.com>
Date: Wed, 14 Oct 2026 13:37:00 +0530
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20FIX:=20Avoid=20gfm=5Fautolink=20?=
 =?UTF-8?q?hangs=20in=20link=20labels=20(#160)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Decline silent autolink matches so link-label scanning can handle
structural delimiters without looping or consuming the closing bracket.
---
 CHANGELOG.md                          |  4 +++
 mdit_py_plugins/gfm_autolink/index.py |  9 +++--
 tests/fixtures/gfm_autolink.md        | 51 +++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a1b78b3..ca180d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## Unreleased
+
+- 🐛 FIX: `gfm_autolink` hang on autolink-like text in link labels (#160)
+
 ## 0.7.0 - 2026-07-19
 
 - ✨ NEW: Add section reference plugin (`section_ref`) (#144)
diff --git a/mdit_py_plugins/gfm_autolink/index.py b/mdit_py_plugins/gfm_autolink/index.py
index 48de4b7..360ba67 100644
--- a/mdit_py_plugins/gfm_autolink/index.py
+++ b/mdit_py_plugins/gfm_autolink/index.py
@@ -159,7 +159,10 @@ def _www_inline_rule(state: StateInline, silent: bool) -> bool:
     label = src[pos : pos + length]
 
     if silent:
-        return True
+        # Autolinks are only recognised when emitting tokens. When skipping
+        # silently (e.g. scanning a link label), report no match so the parser
+        # steps over this text as plain characters (#160).
+        return False
 
     full_url = state.md.normalizeLink(url)
     if not state.md.validateLink(full_url):
@@ -223,7 +226,7 @@ def _protocol_rule(state: StateInline, silent: bool) -> bool:
     label = combined[:total_len]
 
     if silent:
-        return True
+        return False  # see _www_inline_rule
     return _create_autolink(state, bscan_len, total_len, full_url, label)
 
 
@@ -291,5 +294,5 @@ def _email_rule(state: StateInline, silent: bool) -> bool:
     url = "mailto:" + email_text
 
     if silent:
-        return True
+        return False  # see _www_inline_rule
     return _create_autolink(state, local_len, total_len, url, email_text)
diff --git a/tests/fixtures/gfm_autolink.md b/tests/fixtures/gfm_autolink.md
index 6a715f3..03e369f 100644
--- a/tests/fixtures/gfm_autolink.md
+++ b/tests/fixtures/gfm_autolink.md
@@ -223,3 +223,54 @@ xmpp:foo@bar.baz/txt/bin
 .
 <p><a href="xmpp:foo@bar.baz/txt">xmpp:foo@bar.baz/txt</a>/bin</p>
 .
+
+GFM autolink: www in link text after leading text (#160)
+.
+see [www.example.com](https://example.com)
+.
+<p>see <a href="https://example.com">www.example.com</a></p>
+.
+
+GFM autolink: www in emphasized link text (#160)
+.
+[link *www.example.com*](https://example.org)
+.
+<p><a href="https://example.org">link <em>www.example.com</em></a></p>
+.
+
+GFM autolink: www in image alt text (#160)
+.
+see ![www.example.com](i.png)
+.
+<p>see <img src="i.png" alt="www.example.com"></p>
+.
+
+GFM autolink: www in reference link label (#160)
+.
+see [www.example.com]
+
+[www.example.com]: https://example.com
+.
+<p>see <a href="https://example.com">www.example.com</a></p>
+.
+
+GFM autolink: protocol in link text with preceding text (#160)
+.
+https[x https://example.com](u)
+.
+<p>https<a href="u">x https://example.com</a></p>
+.
+
+GFM autolink: email in link text with preceding text (#160)
+.
+a[x b@example.com](u)
+.
+<p>a<a href="u">x b@example.com</a></p>
+.
+
+GFM autolink: mailto in link text with preceding text (#160)
+.
+mailto[x mailto:a@example.com](u)
+.
+<p>mailto<a href="u">x mailto:a@example.com</a></p>
+.