Added regression test

Author: staabm

tests/PHPStan/Analyser/nsrt/bug-14791.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Bug14791;
+
+use function PHPStan\Testing\assertType;
+
+$name = 'c054-foo';
+
+if (preg_match('/^c(0[0-9]{2})-foo/', $name, $matches)) {
+	assertType('non-falsy-string&numeric-string', $matches[1]); // should not be decimal-int-string
+	if ($matches[1] === '054') { // should not error
+		// ...
+	}
+}

tests/PHPStan/Rules/Comparison/StrictComparisonOfDifferentTypesRuleTest.php

@@ -1239,4 +1239,9 @@ public function testBug14473(): void
 		$this->analyse([__DIR__ . '/data/bug-14519.php'], []);
 	}
 
+	public function testBug14791(): void
+	{
+		$this->analyse([__DIR__ . '/../../Analyser/nsrt/bug-14791.php'], []);
+	}
+
 }