[Interest] Update breaks version

[Duane]

On 19/12/2016 11:49 AM, Duane wrote:
> On 19/12/2016 11:03 AM, Kai Koehne wrote:
>>> -----Original Message-----
>>> From: Interest [mailto:interest-bounces+kai.koehne=qt.io at qt-project.org]
>>> On Behalf Of Duane
>>> Sent: Monday, December 19, 2016 4:10 PM
>>> To: interest at qt-project.org
>>> Subject: [Interest] Update breaks version
>>>
>>> I have Qt installed on Windows using MinGW.  I was at 5.7.0 and
>>> updated via
>>> the Maintenance tool to get to 5.7.1 and Creator 4.2.0.  My programs
>>> build
>>> but when I deploy them to systems with 5.7.0 dlls they don't work.
>>>   I thought the dlls were compatible through minor revisions?
>>
>> They should be, and the toolchain to the best of my knowledge hasn't
>> changed
>> in 5.7.1 packages.
>>
>> Could you clarify what 'don't work' means? I suggest to run the
>> application
>> in the Profile mode of 'Dependency Walker' (depends.exe) to find out
>> details.
>>
>
> Don't work means that if I deploy the exe on a target machine with
> Qt4.7.0 dlls it won't run.  "It reports that the application has
> requested the runtime to terminate in an unusual way."  If I replace the
> dlls with those from 4.7.1 then it works.
>
> I have two toolchains.  One with MinGW 3.0  and Qt 4.7.1 that I use with
> QtCreator.  This is the one that seems broken.  I think that MinGW was
> updated but it is still 3.0.
>
> The other tool chain is with Qt 5.5 for the VS2012 compiler.  This one
> wasn't updated and doesn't seem to have this problem.
>


If I launch the exe from the QtCreator IDE but with the 4.7.0 dlls in 
the taget folder I get the same crash but in the debug window of Creator 
I get this:

Cannot mix incompatible Qt library (version 0x50701) with this library 
(version 0x50700)
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.

I keep the dlls in the target folder for my debug builds so that I can 
use a 3rd party program (Memory Validator) to check memory.