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Bug
 - 
    Resolution: Done
 - 
    
P2: Important
 - 
    5.6
 - 
    Windows
 
- 
        f7b44f879cdded7b2c6b604df873f7194e56a63a , 101449a4cfa9c0d216332c6dc8ba826e8109e09d (qtbase/5.8, 12.12.2016, 5.8.1)
 
QDir::cdUp() does not return false when going up from root of UNC network path. On local hard drive it does return false. In Qt 4.8 it also returns false when cdUp():ing on network path root.
Steps to reproduce:
- Run attached sample with valid network path as argument
 - EXPECTED: The while-loop exits when cdUp():ing first time from the network path root
 - ACTUAL: cdUp() never returns false, causing infinite loop
 
- resulted from
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QTBUG-23893 QDir("/").cd("..") is different from QDir("/tmp").cd("../..")
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     - Closed
 
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- resulted in
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QTBUG-72120 QDir::cleanPath behaviour differs in Qt5 vs Qt4 with regard to UNC paths.
-         
     - Closed
 
 -         
 
| For Gerrit Dashboard: QTBUG-53712 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V | 
| 161592,2 | Rewrite test tst_QDir::cdBelowRoot() to be data-driven. | 5.6 | qt/qtbase | Status: MERGED | +2 | 0 | 
| 161593,1 | WIP: Fix cdUp() on Windows network shares. | 5.6 | qt/qtbase | Status: ABANDONED | -2 | 0 | 
| 161766,12 | QDir::cleanPath(): Do not cd above root paths (UNC, WinRT) | 5.8 | qt/qtbase | Status: MERGED | +2 | 0 | 
| 161767,10 | QDir::cd(): Handle UNC server paths correctly | 5.8 | qt/qtbase | Status: MERGED | +2 | 0 |