Skip dead lines in .cov files

src/Extractor/PhpUnitCoverageExtractor.php

@@ -65,8 +65,12 @@ private function extractFileCoverages(
 
             $executableLines = [];
             foreach ($fileCoverage as $lineNumber => $tests) {
+                if ($tests === null) {
+                    continue; // dead (unreachable) line, PHPUnit reports skip it too
+                }
+
                 if (!is_array($tests)) {
-                    throw new LogicException("Invalid coverage file: '{$coverageFile}'. Expected array under {$filePath} and #$lineNumber, got " . get_debug_type($tests));
+                    throw new LogicException("Invalid coverage file: '{$coverageFile}'. Expected array or null under {$filePath} and #$lineNumber, got " . get_debug_type($tests));
                 }
 
                 $executableLines[] = new ExecutableLine((int) $lineNumber, count($tests));

tests/Extractor/PhpUnitCoverageExtractorTest.php

@@ -75,6 +75,22 @@ public function testCovFileFromPhpCodeCoverage14WithEmptyBasePath(): void
         self::assertSame('tests/_fixtures/Sample.php', $result[0]->filePath);
     }
 
+    public function testSkipsDeadLines(): void
+    {
+        $data = new ProcessedCodeCoverageData();
+        $data->setLineCoverage(['Sample.php' => [8 => [], 9 => null, 10 => []]]);
+
+        $extractor = new PhpUnitCoverageExtractor();
+        $result = $extractor->getCoverage($this->writeCovFile([
+            'buildInformation' => [],
+            'basePath' => '',
+            'codeCoverage' => $data,
+            'testResults' => [],
+        ]));
+
+        self::assertSame(['Sample.php' => [8 => 0, 10 => 0]], $this->toHitsMap($result));
+    }
+
     public function testInvalidCovFile(): void
     {
         $extractor = new PhpUnitCoverageExtractor();