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Bug
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Resolution: Unresolved
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Major
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None
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3.3.14
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None
Discussion: https://www.phpbb.com/community/viewtopic.php?t=2658115
Conversion from phpBB 2.0 with Attachment MOD installed may cause PHP fatal error like:
Fatal error: Uncaught TypeError: mysqli_fetch_assoc(): Argument #1 ($result) must be of type mysqli_result, bool given in C:\ProgramFiles\laragon\www\phpbb\phpbb\db\driver\mysqli.php:276
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Stack trace:
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#0 C:\ProgramFiles\laragon\www\phpbb\phpbb\db\driver\mysqli.php(276): mysqli_fetch_assoc(true)
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#1 C:\ProgramFiles\laragon\www\phpbb\phpbb\db\driver\driver.php(389): phpbb\db\driver\mysqli->sql_fetchrow(true)
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#2 C:\ProgramFiles\laragon\www\phpbb\install\convertors\functions_phpbb20.php(1421): phpbb\db\driver\driver->sql_fetchfield('lang_dir')
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#3 C:\ProgramFiles\laragon\www\phpbb\install\convert\convertor.php(1121) : eval()'d code(2): phpbb_attachment_extension_group_name()
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#4 C:\ProgramFiles\laragon\www\phpbb\install\convert\convertor.php(1121): eval()
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#5 C:\ProgramFiles\laragon\www\phpbb\install\convert\convertor.php(252): phpbb\convert\convertor->jump('phpbb20', 1, 3)
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#6 C:\ProgramFiles\laragon\www\phpbb\install\convert\controller\convertor.php(370): phpbb\convert\convertor->convert_data('phpbb20')
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#7 C:\ProgramFiles\laragon\www\phpbb\vendor\symfony\http-kernel\HttpKernel.php(151): phpbb\convert\controller\convertor->convert('phpbb20')
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#8 C:\ProgramFiles\laragon\www\phpbb\vendor\symfony\http-kernel\HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(phpbb\symfony_request), 1)
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#9 C:\ProgramFiles\laragon\www\phpbb\install\app.php(61): Symfony\Component\HttpKernel\HttpKernel->handle(Object(phpbb\symfony_request))
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#10 {main} thrown in C:\ProgramFiles\laragon\www\phpbb\phpbb\db\driver\mysqli.php on line 276
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The bug is in \install\convertors\functions_phpbb20.php, function phpbb_attachment_extension_group_name(), where sql_fetchfield() is used to iterate through SELECT query results in a 'while' loop. sql_fetchfield() implicitly uses current query_id which is getting changed to boolean (true) by UPDATE query result inside the 'while' loop, which leads to the error mentioned.