Regression test

Closes phpstan/phpstan#10650

Author: ondrejmirtes

tests/PHPStan/Analyser/nsrt/bug-10650.php

@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+
+namespace Bug10650;
+
+use function PHPStan\Testing\assertType;
+
+class DistFoo
+{
+	/**
+	 * @param list<'y'> $distPoints
+	 */
+	public function repro(array $distPoints): void
+	{
+		$ranges = [];
+		$pointPrev = null;
+		foreach ($distPoints as $distPoint) {
+			if ($pointPrev !== null) {
+				$ranges[] = 'x';
+			}
+			$pointPrev = $distPoint;
+		}
+
+		assertType('list<\'x\'>', $ranges);
+
+		foreach (array_keys($ranges) as $key) {
+			if (mt_rand() === 0) {
+				unset($ranges[$key]);
+			}
+		}
+
+		assertType('array<int<0, max>, \'x\'>', $ranges);
+	}
+}