fix(base): Add check for null stout and stderr on output to console

Author: EndyKaufman

src/lib/base.ts

@@ -66,14 +66,14 @@ export class Base {
         const stderrWords = child.stderr ? _.words(child.stderr.toString()).filter((word: string) => word) : [];
         if (child.status === 1 || child.status === '1' || stderrWords.length > 0) {
             this.log('commandRunner').error('status', child.status);
-            this.log('commandRunner').error('stderr', child.stderr.toString());
-            this.log('commandRunner').debug('stdout', child.stdout.toString());
+            this.log('commandRunner').error('stderr', child.stderr?child.stderr.toString():child.stderr);
+            this.log('commandRunner').debug('stdout', child.stdout?child.stdout.toString():child.stdout);
             this.log('commandRunner').debug('end');
         }
         else {
             this.log('commandRunner').debug('status', child.status);
-            this.log('commandRunner').debug('stderr', child.stderr.toString());
-            this.log('commandRunner').debug('stdout', child.stdout.toString());
+            this.log('commandRunner').debug('stderr', child.stderr?child.stderr.toString():child.stderr);
+            this.log('commandRunner').debug('stdout', child.stdout?child.stdout.toString():child.stdout);
             this.log('commandRunner').debug('end');
         }
         return await child.status === 0;