fix(material/schematics): add undefined check (#26081)

wagnermaciel · web-flow · commit 3c03ad480ae9 · 2022-11-28T09:27:25.000-05:00
* potential fix for issue #26038
diff --git a/src/material/schematics/ng-generate/mdc-migration/rules/tree-traversal.ts b/src/material/schematics/ng-generate/mdc-migration/rules/tree-traversal.ts
@@ -164,10 +164,13 @@ export function updateAttribute(
   }
 
   const attr = node.attributes[0];
-  const ctx = attr.sourceSpan.start.getContext(attr.sourceSpan.start.col + 1, 1)!;
-  const indentation = ctx.before;
+  if (attr) {
+    const ctx = attr.sourceSpan.start.getContext(attr.sourceSpan.start.col + 1, 1)!;
+    const indentation = ctx.before;
+    return prefix + indentation + attrText + suffix;
+  }
 
-  return prefix + indentation + attrText + suffix;
+  return prefix + attrText + suffix;
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -164,10 +164,13 @@ export function updateAttribute(`
`164`	`164`	`}`
`165`	`165`
`166`	`166`	`const attr = node.attributes[0];`
`167`		`- const ctx = attr.sourceSpan.start.getContext(attr.sourceSpan.start.col + 1, 1)!;`
`168`		`- const indentation = ctx.before;`
	`167`	`+ if (attr) {`
	`168`	`+ const ctx = attr.sourceSpan.start.getContext(attr.sourceSpan.start.col + 1, 1)!;`
	`169`	`+ const indentation = ctx.before;`
	`170`	`+ return prefix + indentation + attrText + suffix;`
	`171`	`+ }`
`169`	`172`
`170`		`- return prefix + indentation + attrText + suffix;`
	`173`	`+ return prefix + attrText + suffix;`
`171`	`174`	`}`
`172`	`175`
`173`	`176`	`/**`