Fix endless loop in case circular dependency occurred in packages

Author: rodion-arr

lib/cli/commands/show.js

@@ -1,6 +1,7 @@
 'use strict';
 const support = require('../../../index.js');
 const Arborist = require('@npmcli/arborist');
+const printed = {};
 
 // print out the information for a module and its
 // children
@@ -22,6 +23,12 @@ async function printModule (module, depth, argv) {
     console.log(`${' '.repeat(2 * (depth + 1))}${moduleInfo} - ${supportInfo.url}`);
   }
 
+  // avoid printing children of already printed module in current branch
+  if (pkg.name in printed && depth > printed[pkg.name]) {
+    return;
+  }
+  printed[pkg.name] = depth;
+
   // sort child modules
   module.edgesOut = new Map([...module.edgesOut.entries()].sort());