nodejs
diff --git a/‎lib/internal/util/inspect.js‎
Lines changed: 1 addition & 1 deletion b/‎lib/internal/util/inspect.js‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎test/parallel/test-util-inspect.js‎
Lines changed: 6 additions & 0 deletions b/‎test/parallel/test-util-inspect.js‎
Lines changed: 6 additions & 0 deletions
@@ -2207,7 +2207,7 @@ function formatNumber(fn, number, numericSeparator) {
     }
     return fn(addNumericSeparator(numberString), 'number');
   }
-  if (NumberIsNaN(number)) {
+  if (NumberIsNaN(number) || StringPrototypeIncludes(numberString, 'e')) {
     return fn(numberString, 'number');
   }
 
 
@@ -3848,6 +3848,12 @@ assert.strictEqual(
       '-0.123_45'
     );
   }
+
+  // Numbers in scientific notation should not get malformed separators
+  assert.strictEqual(util.inspect(1e-7, { numericSeparator: true }), '1e-7');
+  assert.strictEqual(util.inspect(1.5e-10, { numericSeparator: true }), '1.5e-10');
+  assert.strictEqual(util.inspect(1.23e-100, { numericSeparator: true }), '1.23e-100');
+  assert.strictEqual(util.inspect(1.23456789e-12, { numericSeparator: true }), '1.23456789e-12');
 }
 
 // Regression test for https://github.com/nodejs/node/issues/41244
Original file line number	Diff line number	Diff line change
@@ -2207,7 +2207,7 @@ function formatNumber(fn, number, numericSeparator) {
2207	2207	}
2208	2208	return fn(addNumericSeparator(numberString), 'number');
2209	2209	}
2210		- if (NumberIsNaN(number)) {
	2210	+ if (NumberIsNaN(number) \|\| StringPrototypeIncludes(numberString, 'e')) {
2211	2211	return fn(numberString, 'number');
2212	2212	}
2213	2213
Original file line number	Diff line number	Diff line change
@@ -3848,6 +3848,12 @@ assert.strictEqual(
3848	3848	'-0.123_45'
3849	3849	);
3850	3850	}
	3851	+
	3852	+ // Numbers in scientific notation should not get malformed separators
	3853	+ assert.strictEqual(util.inspect(1e-7, { numericSeparator: true }), '1e-7');
	3854	+ assert.strictEqual(util.inspect(1.5e-10, { numericSeparator: true }), '1.5e-10');
	3855	+ assert.strictEqual(util.inspect(1.23e-100, { numericSeparator: true }), '1.23e-100');
	3856	+ assert.strictEqual(util.inspect(1.23456789e-12, { numericSeparator: true }), '1.23456789e-12');
3851	3857	}
3852	3858
3853	3859	// Regression test for https://github.com/nodejs/node/issues/41244