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+--TEST--
+Bug #73155 (imagegd2() writes wrong chunk sizes on boundaries)
+--SKIPIF--
+<?php
+if (!extension_loaded('gd')) die('skip gd extension not available');
+?>
+--FILE--
+<?php
+$im = imagecreate(64, 64);
+imagecolorallocate($im, 0, 0, 0);
+
+ob_start();
+imagegd2($im, null, 64, IMG_GD2_RAW);
+$buffer = ob_get_clean();
+
+$header = unpack('@10/nchunk_size/nformat/nx_count/ny_count', $buffer);
+printf("chunk size: %d\n", $header['chunk_size']);
+printf("x chunk count: %d\n", $header['x_count']);
+printf("y chunk count: %d\n", $header['y_count']);
+printf("file size: %d\n", strlen($buffer));
+?>
+===DONE===
+--EXPECT--
+chunk size: 64
+x chunk count: 1
+y chunk count: 1
+file size: 5145
+===DONE===