fix: crash with unquoted attribute value

.changeset/mean-eagles-deny.md

@@ -0,0 +1,5 @@
+---
+"astro-eslint-parser": patch
+---
+
+fix: crash with unquoted attribute value

src/context/restore.ts

@@ -40,6 +40,11 @@ class RestoreNodeProcessContext {
   public getParent(node: TSESTree.Node): TSESTree.Node | null {
     return this.nodeMap.get(node) || null;
   }
+
+  public findToken(startIndex: number): TSESTree.Token | null {
+    const tokens = this.result.ast.tokens || [];
+    return tokens.find((t) => t.range[0] === startIndex) || null;
+  }
 }
 
 export class RestoreContext {

src/parser/process-template.ts

@@ -174,7 +174,42 @@ export function processTemplate(
               processAttributePunctuators(attr);
             }
           }
-          if (attr.kind === "shorthand") {
+          if (attr.kind === "quoted") {
+            if (
+              attr.raw &&
+              !attr.raw.startsWith('"') &&
+              !attr.raw.startsWith("'")
+            ) {
+              const attrStart = attr.position!.start.offset;
+              const start = calcAttributeValueStartOffset(attr, ctx);
+              const end = calcAttributeEndOffset(attr, ctx);
+              script.appendOriginal(start);
+              script.appendVirtualScript('"');
+              script.appendOriginal(end);
+              script.appendVirtualScript('"');
+
+              script.restoreContext.addRestoreNodeProcess(
+                (scriptNode, context) => {
+                  if (
+                    scriptNode.type === AST_NODE_TYPES.JSXAttribute &&
+                    scriptNode.range[0] === attrStart
+                  ) {
+                    const attrNode = scriptNode;
+                    if (
+                      attrNode.value?.type === "Literal" &&
+                      typeof attrNode.value.value === "string"
+                    ) {
+                      const raw = ctx.code.slice(start, end);
+                      attrNode.value.raw = raw;
+                      context.findToken(start)!.value = raw;
+                      return true;
+                    }
+                  }
+                  return false;
+                },
+              );
+            }
+          } else if (attr.kind === "shorthand") {
             const start = attr.position!.start.offset;
             script.appendOriginal(start);
             const jsxName = /[\s"'[\]{}]/u.test(attr.name)

tests/fixtures/parser/ast/attr01-unquote-input.astro

@@ -0,0 +1,4 @@
+---
+---
+
+<div title=foo></div>