Handle parser inconsistency for "u@.com" to avoid repeatedly wrapping with "<>" when fixing the bare URL (email) (fixes #1140).

demo/markdownlint-browser.js

@@ -5090,7 +5090,28 @@ module.exports = {
     const literalAutolinks = (tokens) => (
       filterByPredicate(
         tokens,
-        (token) => (token.type === "literalAutolink") && !inHtmlFlow(token),
+        (token) => {
+          if ((token.type === "literalAutolink") && !inHtmlFlow(token)) {
+            // Detect and ignore https://github.com/micromark/micromark/issues/164
+            const siblings = token.parent?.children;
+              // Commented-out due to not being able to exercise in test/code coverage
+              // || micromarkTokens;
+            const index = siblings?.indexOf(token);
+            // @ts-ignore
+            const prev = siblings?.at(index - 1);
+            // @ts-ignore
+            const next = siblings?.at(index + 1);
+            return !(
+              prev &&
+              next &&
+              (prev.type === "data") &&
+              (next.type === "data") &&
+              prev.text.endsWith("<") &&
+              next.text.startsWith(">")
+            );
+          }
+          return false;
+        },
         (token) => {
           const { children } = token;
           const result = [];

lib/md034.js

@@ -21,7 +21,28 @@ module.exports = {
     const literalAutolinks = (tokens) => (
       filterByPredicate(
         tokens,
-        (token) => (token.type === "literalAutolink") && !inHtmlFlow(token),
+        (token) => {
+          if ((token.type === "literalAutolink") && !inHtmlFlow(token)) {
+            // Detect and ignore https://github.com/micromark/micromark/issues/164
+            const siblings = token.parent?.children;
+              // Commented-out due to not being able to exercise in test/code coverage
+              // || micromarkTokens;
+            const index = siblings?.indexOf(token);
+            // @ts-ignore
+            const prev = siblings?.at(index - 1);
+            // @ts-ignore
+            const next = siblings?.at(index + 1);
+            return !(
+              prev &&
+              next &&
+              (prev.type === "data") &&
+              (next.type === "data") &&
+              prev.text.endsWith("<") &&
+              next.text.startsWith(">")
+            );
+          }
+          return false;
+        },
         (token) => {
           const { children } = token;
           const result = [];

test/bare-urls.md

@@ -97,6 +97,8 @@ Email addresses are treated similarly: user@example.com {MD034}
 
 Angle brackets work the same for email: <user@example.com>
 
+Unusual email addresses are handled: <user@.com>
+
 ---
 
 [is-a-valid]: https://example.com

test/snapshots/markdownlint-test-scenarios.js.md

@@ -3539,7 +3539,7 @@ Generated by [AVA](https://avajs.dev).
             editColumn: 59,
             insertText: '<https://example.com>',
           },
-          lineNumber: 104,
+          lineNumber: 106,
           ruleDescription: 'Bare URL used',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md034.md',
           ruleNames: [
@@ -3647,6 +3647,8 @@ Generated by [AVA](https://avajs.dev).
       ␊
       Angle brackets work the same for email: <user@example.com>␊
       ␊
+      Unusual email addresses are handled: <user@.com>␊
+      ␊
       ---␊
       ␊
       [is-a-valid]: https://example.com␊