From f04804d6a5421d2373200a2a6fb3ca7f72a9a5fb Mon Sep 17 00:00:00 2001
From: Sebastian Bergmann <sb@sebastian-bergmann.de>
Date: Sun, 17 Nov 2024 09:59:10 +0100
Subject: [PATCH] Increase PHPStan rule level to 10

---
 phpstan.neon     | 2 +-
 src/CodeUnit.php | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/phpstan.neon b/phpstan.neon
index 3e639cd..9228327 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,4 +1,4 @@
 parameters:
-    level: 9
+    level: 10
     paths:
         - src
diff --git a/src/CodeUnit.php b/src/CodeUnit.php
index 87eaf71..e4e3b43 100644
--- a/src/CodeUnit.php
+++ b/src/CodeUnit.php
@@ -9,6 +9,7 @@
  */
 namespace SebastianBergmann\CodeUnit;
 
+use function assert;
 use function count;
 use function file;
 use function file_exists;
@@ -98,13 +99,16 @@ public static function forFileWithAbsolutePath(string $path): FileUnit
     {
         self::ensureFileExistsAndIsReadable($path);
 
+        $lines = file($path);
+
+        assert($lines !== false);
+
         return new FileUnit(
             $path,
             $path,
             range(
                 1,
-                // @phpstan-ignore argument.type
-                count(file($path)),
+                count($lines),
             ),
         );
     }