fix: crash on modified AST from postcss-loader (#1268)

Author: alexander-akait

src/plugins/postcss-import-parser.js

@@ -14,7 +14,11 @@ function visitor(result, parsedResults, node, key) {
     return;
   }
 
-  if (node.raws.afterName && node.raws.afterName.trim().length > 0) {
+  if (
+    node.raws &&
+    node.raws.afterName &&
+    node.raws.afterName.trim().length > 0
+  ) {
     const lastCommentIndex = node.raws.afterName.lastIndexOf("/*");
     const matched = node.raws.afterName
       .slice(lastCommentIndex)

src/plugins/postcss-url-parser.js

@@ -68,12 +68,14 @@ function visitor(result, parsedResults, node, key) {
   }
 
   const parsed = valueParser(
-    typeof node.raws.value === "undefined" ? node[key] : node.raws.value.raw
+    node.raws && node.raws.value && node.raws.value.raw
+      ? node.raws.value.raw
+      : node[key]
   );
 
   let inBetween;
 
-  if (typeof node.raws.between !== "undefined") {
+  if (node.raws && node.raws.between) {
     const lastCommentIndex = node.raws.between.lastIndexOf("/*");
 
     const matched = node.raws.between