nodejs
diff --git a/Collapse file
‎lib/internal/util/inspect.js‎
Copy file name to clipboardExpand all lines: lib/internal/util/inspect.js
+5-2Lines changed: 5 additions & 2 deletions b/Collapse file
‎lib/internal/util/inspect.js‎
Copy file name to clipboardExpand all lines: lib/internal/util/inspect.js
+5-2Lines changed: 5 additions & 2 deletions
diff --git a/Collapse file
‎test/parallel/test-util-inspect.js‎
Copy file name to clipboardExpand all lines: test/parallel/test-util-inspect.js
+18Lines changed: 18 additions & 0 deletions b/Collapse file
‎test/parallel/test-util-inspect.js‎
Copy file name to clipboardExpand all lines: test/parallel/test-util-inspect.js
+18Lines changed: 18 additions & 0 deletions
@@ -1931,8 +1931,11 @@ function reduceToSingleString(
         const start = output.length + ctx.indentationLvl +
                       braces[0].length + base.length + 10;
         if (isBelowBreakLength(ctx, output, start, base)) {
-          return `${base ? `${base} ` : ''}${braces[0]} ${join(output, ', ')}` +
-            ` ${braces[1]}`;
+          const joinedOutput = join(output, ', ');
+          if (!joinedOutput.includes('\n')) {
+            return `${base ? `${base} ` : ''}${braces[0]} ${joinedOutput}` +
+              ` ${braces[1]}`;
+          }
         }
       }
     }
 
@@ -2631,6 +2631,24 @@ assert.strictEqual(
 
   assert.strictEqual(out, expected);
 
+  // Array grouping should prevent lining up outer elements on a single line.
+  obj = [[[1, 2, 3, 4, 5, 6, 7, 8, 9]]];
+
+  out = util.inspect(obj, { compact: 3 });
+
+  expected = [
+    '[',
+    '  [',
+    '    [',
+    '      1, 2, 3, 4, 5,',
+    '      6, 7, 8, 9',
+    '    ]',
+    '  ]',
+    ']',
+  ].join('\n');
+
+  assert.strictEqual(out, expected);
+
   // Verify that array grouping and line consolidation does not happen together.
   obj = {
     a: {
Original file line number	Diff line number	Diff line change
`@@ -1931,8 +1931,11 @@ function reduceToSingleString(`
`1931`	`1931`	`const start = output.length + ctx.indentationLvl +`
`1932`	`1932`	`braces[0].length + base.length + 10;`
`1933`	`1933`	`if (isBelowBreakLength(ctx, output, start, base)) {`
`1934`		- return `${base ? `${base} ` : ''}${braces[0]} ${join(output, ', ')}` +
`1935`		- ` ${braces[1]}`;
	`1934`	`+ const joinedOutput = join(output, ', ');`
	`1935`	`+ if (!joinedOutput.includes('\n')) {`
	`1936`	+ return `${base ? `${base} ` : ''}${braces[0]} ${joinedOutput}` +
	`1937`	+ ` ${braces[1]}`;
	`1938`	`+ }`
`1936`	`1939`	`}`
`1937`	`1940`	`}`
`1938`	`1941`	`}`