fix: issue #1476 crash with numeric string value terminating with new line

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Fix RATE, PRICE, XIRR, and XNPV Functions [#1456](https://github.com/PHPOffice/PhpSpreadsheet/pull/1456)
 - Save Excel 2010+ functions properly in XLSX [#1461](https://github.com/PHPOffice/PhpSpreadsheet/pull/1461)
 - Several improvements in HTML writer [#1464](https://github.com/PHPOffice/PhpSpreadsheet/pull/1464)
+- Fix Crash while trying setting a cell the value "123456\n" [#1476](https://github.com/PHPOffice/PhpSpreadsheet/pull/1481)
 
 ### Changed
 

src/PhpSpreadsheet/Cell/DefaultValueBinder.php

@@ -65,6 +65,8 @@ public static function dataTypeForValue($pValue)
                 return DataType::TYPE_STRING;
             } elseif ((strpos($pValue, '.') === false) && ($pValue > PHP_INT_MAX)) {
                 return DataType::TYPE_STRING;
+            } elseif (!is_numeric($pValue)) {
+                return DataType::TYPE_STRING;
             }
 
             return DataType::TYPE_NUMERIC;

tests/PhpSpreadsheetTests/Cell/DefaultValueBinderTest.php

@@ -57,6 +57,7 @@ public function binderProvider()
             ['#REF!'],
             [new DateTime()],
             [new DateTimeImmutable()],
+            ['123456\n'],
         ];
     }
 

tests/data/Cell/DefaultValueBinder.php

@@ -73,4 +73,8 @@
         'e',
         '#DIV/0!',
     ],
+    [
+        's',
+        '123456\n',
+    ],
 ];