Hi all,
I dont know whether this is the right place to ask, so please tell if i am wrong. I am afraid that i am new to gnuradio, so i got a problem writing an OOT-module. I used gr_modtool for the basic structure, wrote my code and did one of these unit tests. My test case worked so i installed it, connecting the blocks the same way like I did in that test, and it failed producing this trace back: *** Error in `/usr/bin/python2': corrupted double-linked list: 0x000000000293e300 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7ff42dc2b7e5] /lib/x86_64-linux-gnu/libc.so.6(+0x81f88)[0x7ff42dc35f88] /lib/x86_64-linux-gnu/libc.so.6(__libc_malloc+0x54)[0x7ff42dc375d4] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(_Znwm+0x18)[0x7ff42ac73e78] /usr/local/lib/libgnuradio-runtime-3.7.11.1.so.0.0.0(_ZN2gr11basic_block24message_port_register_inEN5boost13intrusive_ptrIN3pmt8pmt_baseEEE+0x139)[0x7ff417b690a9] /usr/local/lib/libgnuradio-runtime-3.7.11.1.so.0.0.0(_ZN2gr5blockC2ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEN5boost10shared_ptrINS_12io_signatureEEESC_+0x3ae)[0x7ff417b7454e] /usr/local/lib/libgnuradio-runtime-3.7.11.1.so.0.0.0(_ZN2gr10sync_blockC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEN5boost10shared_ptrINS_12io_signatureEEESC_+0x5e)[0x7ff417bc5dbe] /usr/local/lib/libgnuradio-blocks-3.7.11.1.so.0.0.0(+0x1925c9)[0x7ff417fa45c9] /usr/local/lib/libgnuradio-blocks-3.7.11.1.so.0.0.0(_ZN2gr6blocks8throttle4makeEmdb+0x49)[0x7ff417fa4b69] /usr/local/lib/python2.7/dist-packages/gnuradio/blocks/_blocks_swig1.so(+0x125744)[0x7ff41666e744] /usr/bin/python2(PyEval_EvalFrameEx+0x68a)[0x4c468a] /usr/bin/python2(PyEval_EvalCodeEx+0x255)[0x4c2765] /usr/bin/python2(PyEval_EvalFrameEx+0x6099)[0x4ca099] /usr/bin/python2(PyEval_EvalCodeEx+0x255)[0x4c2765] /usr/bin/python2[0x4de6fe] /usr/bin/python2(PyObject_Call+0x43)[0x4b0cb3] /usr/bin/python2[0x4f492e] /usr/bin/python2(PyObject_Call+0x43)[0x4b0cb3] /usr/bin/python2[0x4f46a7] /usr/bin/python2[0x4b670c] /usr/bin/python2(PyObject_Call+0x43)[0x4b0cb3] /usr/bin/python2(PyEval_EvalFrameEx+0x5faf)[0x4c9faf] /usr/bin/python2(PyEval_EvalCodeEx+0x255)[0x4c2765] /usr/bin/python2(PyEval_EvalFrameEx+0x6099)[0x4ca099] /usr/bin/python2(PyEval_EvalCodeEx+0x255)[0x4c2765] /usr/bin/python2(PyEval_EvalCode+0x19)[0x4c2509] /usr/bin/python2[0x4f1def] /usr/bin/python2(PyRun_FileExFlags+0x82)[0x4ec652] /usr/bin/python2(PyRun_SimpleFileExFlags+0x191)[0x4eae31] /usr/bin/python2(Py_Main+0x68a)[0x49e14a] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7ff42dbd4830] /usr/bin/python2(_start+0x29)[0x49d9d9] If needed, i can provide a memory map, too. My question is what does the error in line 5 mean. I dont alloc anything neither using a new call, so I think this causes the error. I declared message ports within the constructor like it`s done in other library modules. This iussue vanished using a char_to_float connected to a QT GUI Time Sink as final step instead of constellation modulator and null sink. I am looking forward to hearing from you and many thanks for your help. If any futher Information needed, i am glad to provide it. Sebastian
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