more asserts

Author: kripken

tools/acorn-optimizer.mjs

@@ -806,6 +806,7 @@ function emitDCEGraph(ast) {
         emptyOut(node); // ignore this in the second pass; we scan defuns separately
       }
     } else if (node.type === 'ArrowFunctionExpression') {
+      assert(specialScopes > 0);
       specialScopes--;
       // Check if this is the minimal runtime exports function, which looks like
       //   (output) => { var wasmExports = output.instance.exports;
@@ -872,6 +873,7 @@ function emitDCEGraph(ast) {
         }
       }
     } else if (node.type === 'Property' && node.method) {
+      assert(specialScopes > 0);
       specialScopes--;
     }
   }, (node) => {