TYPO3 Core

Here is an example of the given debug output:

debug_backtrace SC_db_list->main#451 // recordList->generateList#295 // localRecordList->getTable#268 // ux_t3lib_DB->exec_SELECT_queryArray#400 // ux_t3lib_DB->exec_SELECTquery#272 // ux_t3lib_DB->myDebug#210

You can see, that the line numbers are misleading.
recordList->generateList is called on line #295 in the file which contains the class SC_db_list.

You have still the same problem in TYPO3 6.0.

typo3/sysext/core/Classes/Utility/DebugUtility.php

static public function debugTrail() {

...
    $pathFragment = $dat['class'] . $dat['type'] . $dat['function'];
}

The file name is still missing.

This won't be a problem with namespaces. The namespace will help to find the path to the file which you need.
However it would be nice, if you could make this configurable in a global constant.

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/47545

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/47545