#177: EXC_BAD_ACCESS in CarpetIOASCII --------------------+------------------------------------------------------- Reporter: hinder | Owner: eschnett Type: defect | Status: new Priority: major | Milestone: Component: Carpet | Version: Keywords: | --------------------+------------------------------------------------------- I am trying to run a minimal parameter file for testing purposes (attached). Cactus gets as far as printing the iteration 0 info line and then appears to hang. When I run in a debugger, it reports:

Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: 13 at address: 0x0000000000000000 0x0000000100b858b7 in CarpetIOASCII::WriteASCII<0> (os=@0x7fff5fbfc5e0, gfdatas={<std::_Vector_base<const gdata *, std::allocator<const gdata *>

...

= {_M_impl = {<allocator<const gdata *>> =

{<__gnu_cxx::new_allocator<const gdata *>> = {<No data fields>}, <No data fields>}, _M_start = 0x109f0ea10, _M_finish = 0x109f0eab8, _M_end_of_storage = 0x109f0eab8}}, <No data fields>}, gfext=@0x7fff5fbfc960, vi=0, time=0, org=@0x7fff5fbfcafc, dirs=@0x7fff5fbfd150, rl=0, ml=0, m=0, c=0, tl=0, coord_time=0, coord_lower=@0x7fff5fbfc9d8, coord_upper=@0x7fff5fbfc9f0) at ioascii.cc:1378 1378 switch (vartype) { (gdb) bt #0 0x0000000100b858b7 in CarpetIOASCII::WriteASCII<0> (os=@0x7fff5fbfc5e0, gfdatas={<std::_Vector_base<const gdata *, std::allocator<const gdata *> >> = {_M_impl = {<allocator<const gdata *>> = {<__gnu_cxx::new_allocator<const gdata *>> = {<No data fields>}, <No data fields>}, _M_start = 0x109f0ea10, _M_finish = 0x109f0eab8, _M_end_of_storage = 0x109f0eab8}}, <No data fields>}, gfext=@0x7fff5fbfc960, vi=0, time=0, org=@0x7fff5fbfcafc, dirs=@0x7fff5fbfd150, rl=0, ml=0, m=0, c=0, tl=0, coord_time=0, coord_lower=@0x7fff5fbfc9d8, coord_upper=@0x7fff5fbfc9f0) at ioascii.cc:1378 #1 0x0000000100b5b7ee in CarpetIOASCII::IOASCII<0>::OutputDirection (cctkGH=0x109f073f0, vindex=0, alias={_M_dataplus = {<allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x10a06c1c8 "carpet::timing"}}, basefilename={_M_dataplus = {<allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x10a06ba68 "minimal/carpet::timing"}}, dirs=@0x7fff5fbfd150, is_new_file=true, truncate_file=true) at ioascii.cc:610 #2 0x0000000100b554c4 in CarpetIOASCII::IOASCII<0>::OutputVarAs (cctkGH=0x109f073f0, varname=0x10a06c170 "CARPET::physical_time_per_hour", alias=0x10a06be00 "carpet::timing") at ioascii.cc:480 #3 0x0000000100b57370 in CarpetIOASCII::IOASCII<0>::TriggerOutput (cctkGH=0x109f073f0, vindex=0) at ioascii.cc:359 #4 0x0000000100b542b7 in CarpetIOASCII::IOASCII<0>::OutputGH (cctkGH=0x109f073f0) at ioascii.cc:239 #5 0x000000010329a006 in Carpet::OutputGH (cctkGH=0x109f073f0) at OutputGH.cc:55 #6 0x0000000103293b25 in Carpet::OutputGH (where=0x104c70f3c "Initialise::CallAnalysis", cctkGH=0x109f073f0) at Initialise.cc:1382 #7 0x000000010328d432 in Carpet::CallAnalysis (cctkGH=0x109f073f0) at Initialise.cc:530 #8 0x00000001032892d4 in Carpet::Initialise (fc=0x7fff5fbfe2b0) at Initialise.cc:118 #9 0x000000010005806a in main (argc=4, argv=0x7fff5fbfe318) at flesh.cc:80

I do not see how this line "switch(vartype)" where vartype is declared on the stack, could lead to this error. This configuration has been rebuilt with -O0 (Intel compiler) and debugging enabled.

This is with the current production (Git) version of Carpet running on Mac OS 10.6.5. The code is compiled as 64 bit. This parameter file has worked in the past, though with 32 bit on Mac OS 10.5.