fix: Attribute intersections interpreted incorrectly during compilation.

Author: chriseppstein

Diff for: packages/@css-blocks/core/src/BlockTree/Block.ts

@@ -485,7 +485,15 @@ export class Block
         return [klass, 0];
       }
     } else if (isAttributeNode(node)) {
-      let attr = this.rootClass.ensureAttributeValue(toAttrToken(node));
+      let prevNode = node.prev();
+      while (prevNode && !(selectorParser.isClassName(prevNode) || isRootNode(prevNode))) {
+        prevNode = prevNode.prev();
+      }
+      if (!prevNode) {
+        throw new Error("internal error - illegal selector encountered after validation.");
+      }
+      let klass = this.getClass(prevNode.value);
+      let attr = klass?.getAttributeValue(toAttrToken(node));
       if (attr) {
         return [attr, 0];
       } else {

Diff for: packages/@css-blocks/core/test/BlockParser/block-composition-test.ts

@@ -155,7 +155,7 @@ export class BlockNames extends BEMProcessor {
         indented`
           .test-block__bar { }
           .test-block__bar--active { }
-          .test-block__bar--color.test-block--inverse { background: blue; }
+          .test-block__bar--color.test-block__bar--inverse { background: blue; }
           /* Source: foo/bar/test-block.css
            * :scope (.test-block)
            *  composes: