id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
5675	Bad memory management issue with iteration variable warning and dump	Francesco Casella	Andreas Heuermann	"I tried to run models from the PowerGrids library on Windows with the latest nightly build, and most of them caused OMEdit to crash. The problem only takes place on Windows, the Linux version runs fine.

I attach the {{{omeditcommands.mos}}} and {{{openmodelica.stacktrace.OMEdit}}} files corresponding to one such test cases. From what I understand, everything works fine until OMEdit calls the {{{translate()}}} API function, which fails badly. I tried to run the {{{omeditcommands.mos}}}, which also silently fails when executing the {{{translate}}} API function. 

The relevant part of the stacktrace seems to be this one
{{{
#11 0x00007ffdb22f477f in ntdll!.chkstk () from C:\WINDOWS\SYSTEM32\ntdll.dll
No symbol table info available.
#12 0x00007ffdb2254bef in ntdll!RtlWalkFrameChain () from C:\WINDOWS\SYSTEM32\ntdll.dll
No symbol table info available.
#13 0x00007ffdb22f34ee in ntdll!KiUserExceptionDispatcher () from C:\WINDOWS\SYSTEM32\ntdll.dll
No symbol table info available.
#14 0x0000000012c8a2ff in stringAppend () from C:\Program Files\OpenModelica1.14.0-dev-64bit\bin\libOpenModelicaCompiler.dll
No symbol table info available.
#15 0x0000000012b56f3d in omc_DAEDump_dumpCommentAnnotationStr (threadData=threadData@entry=0xb52fb60, _inComment=0xfbc51f63) at C:/dev/OM64bit/OMCompiler/Compiler/FrontEnd/DAEDump.mo:802
#16 0x00000000126923aa in omc_BackendDump_varString (threadData=0xb52fb60, _inVar=0x0) at C:/dev/OM64bit/OMCompiler/Compiler/BackEnd/BackendDump.mo:2492
#17 0x000000001269e05a in omc_BackendDump_printVar (threadData=0xb52fb60, _inVar=<optimized out>) at C:/dev/OM64bit/OMCompiler/Compiler/BackEnd/BackendDump.mo:396
#18 0x000000001269e0f5 in omc_BackendDump_printVars1 (threadData=0xb52fb60, _inVar=0xfe11dc83, _inVarNo=1) at C:/dev/OM64bit/OMCompiler/Compiler/BackEnd/BackendDump.mo:418
#19 0x000000001269e11c in boxptr_BackendDump_printVars1 (threadData=<optimized out>, _inVar=<optimized out>, _inVarNo=<optimized out>) at C:/dev/OM64bit/OMCompiler/Compiler/boot/build/tmp/BackendDump.c:18043
#20 0x0000000012722fd0 in omc_List_fold 
#21 0x000000001269dc0d in omc_BackendDump_printVarList 
#22 0x000000001269dd45 in omc_BackendDump_dumpVarList 
#23 0x00000000125098f1 in omc_SymbolicJacobian_printNonLinIterVarsAndEqs 
#24 0x0000000012509d86 in omc_SymbolicJacobian_checkNonLinDependecies #25 0x0000000012510d20 in omc_SymbolicJacobian_calculateJacobianComponent 
#26 0x0000000012511077 in omc_SymbolicJacobian_calculateJacobiansComponents 
}}}


I perfomed a bisection search on the nightly builds, the last nightly that didn't have this issue was [https://github.com/OpenModelica/OpenModelica/commit/c6fab8d26e85e94479eb0ab64085f97924ba3b75 c6fab8d], while the next one [https://github.com/OpenModelica/OpenModelica/commit/f809ccf373a523cd6fedd25b1d4aec5b84efb807 f809ccf] had it. Hence, there is something wrong with one of these commits:
- [https://github.com/OpenModelica/OpenModelica/commit/85d96360c18d5239b3805f8faa3e814e23c49e7e 85d9636] by @AnHeuermann
- [https://github.com/OpenModelica/OpenModelica/commit/46971929befa0089139bdb78d0b0df2e532393c9 4697192] by @adeas31
- [https://github.com/OpenModelica/OpenModelica/commit/f809ccf373a523cd6fedd25b1d4aec5b84efb807 f809ccf] by @adeas31

I'd say all the avaliable evidence points to the first one, including the fact that a memory management issue is consistent with the fact that omc fails on Windows but not on Linux.

@AnHeuermann, can you please have a look at this ASAP and fix it on both master and 1.14.0 maintenance?

Thanks!"	defect	closed	blocker	1.14.0	Backend		fixed		Karim Adbdelhak Adeel Asghar Andrea Bartolini adrien.guironnet@…