[Ipopt] Debug printing in Ipopt

[Brad Bell]

Thanks for the reply. I was able to get the example
    examples/Cpp_example
to run with the change (and see the output in debug.out).
I need to track down why my case is crashing.


On 8/20/20 7:54 AM, Stefan Vigerske wrote:
> Hi,
>
> it seems to work for me.
> I enabled the verbosity and ran test hs071_cpp and got a file debug.out, no segfault.
>
> Maybe you can have a look why there is a segfault.
>
> Stefan
>
> On 8/20/20 4:06 PM, Brad Bell wrote:
>> I am using Ipopt-3.13.2 and having trouble understanding how the debug printing works.
>>
>> I configure Ipopt with the following:
>>      ../../../Ipopt/configure \
>>          --disable-dependency-tracking \
>>          --prefix=/home/bradbell/prefix/dismod_at \
>>          ADD_FCFLAGS=-fallow-argument-mismatch \
>>          --enable-debug \
>>          --libdir=/home/bradbell/prefix/dismod_at/lib64 \
>>          --disable-shared \
>>          --with-coin-instdir=/home/bradbell/prefix/dismod_at \
>>          --with-ipopt-verbosity
>>
>> If I run the program with no changes to the Ipopt source, it works (not fine because I am trying 
>> to understand why ipopt is failing to optimize my simple problem).
>>
>> If in the file
>>      src/Algorithm/IpIpoptCalculatedQuantities.cpp
>> I change
>>      static const Index dbg_verbosity = 0;
>> to
>>      static const Index dbg_verbosity = 1;
>>
>> I then build my application using Ipopt and run it in the gdb debugger and get the following 
>> message:
>> ... snip ...
>> Using host libthread_db library "/lib64/libthread_db.so.1".
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x000000000086c83c in Ipopt::DebugJournalistWrapper::DebugPrintf (this=0x7fffffff6b10, 
>> verbosity=1, pformat=0xbc70b8 "-> Calling to: %s in obj: 0x%x\n")
>>      at ../../../../../Ipopt/src/Common/IpDebug.cpp:113
>> 113          jrnl_->PrintfIndented(J_ERROR, J_DBG, indentation_level_, "# ");
>> ... snip ...
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>