try fix

swissspidy · swissspidy · commit 34178c65d2ff · 2026-03-29T12:40:33.000+02:00
diff --git a/lib/cli/Shell.php b/lib/cli/Shell.php
@@ -112,7 +112,7 @@ static public function hide($hidden = true) {
 	 */
 	static public function is_windows() {
 		$test_is_windows = getenv( 'WP_CLI_TEST_IS_WINDOWS' );
-		if ( false !== $test_is_windows ) {
+		if ( false !== $test_is_windows && '' !== $test_is_windows ) {
 			return (bool) $test_is_windows;
 		}
 		return strtoupper( substr( PHP_OS, 0, 3 ) ) === 'WIN';

Original file line number	Diff line number	Diff line change
`@@ -112,7 +112,7 @@ static public function hide($hidden = true) {`
`112`	`112`	`*/`
`113`	`113`	`static public function is_windows() {`
`114`	`114`	`$test_is_windows = getenv( 'WP_CLI_TEST_IS_WINDOWS' );`
`115`		`- if ( false !== $test_is_windows ) {`
	`115`	`+ if ( false !== $test_is_windows && '' !== $test_is_windows ) {`
`116`	`116`	`return (bool) $test_is_windows;`
`117`	`117`	`}`
`118`	`118`	`return strtoupper( substr( PHP_OS, 0, 3 ) ) === 'WIN';`