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POPython segmentation error working in shell - Mavericks readline.so bug
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  1. POPython segmentation error working in shell - Mavericks readline.so bug
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    copied!<p>I'm working on a small-ish Django system, it uses about 14,000 records. I hadn't used aggregate features before, so wanted to play about with them in shell. When I do <code>from core.models import Match</code> followed by <code>from django.db.models import Avg</code> I get a segmentation error. Background reading suggests this is a memory problem; I've tried closing everything possible and cleaning unused memory, so I'm running with about 4Gb free.</p> <p>I can import <em>either</em> command, in either order (so Match, the dataset can be imported first or second, doesn't matter) on its own - it's only when I try and import another module, or manipulate it that I get the error. Example: </p> <pre><code>&gt;&gt;&gt; from core.models import Match &gt;&gt;&gt; t = match.objects.filter(team_name="Coventry") Segmentation fault: 11 </code></pre> <p>or</p> <pre><code>&gt;&gt;&gt; from django.db.models import Avg &gt;&gt;&gt; from core.models import Match Segmentation fault: 11 </code></pre> <p>similarly, running in dif order works until the second command:</p> <pre><code>&gt;&gt;&gt; from core.models import Match &gt;&gt;&gt; from django.db.models import Avg Segmentation fault: 11 </code></pre> <p>If relevant, I'm just running the Django devserver on SQLite3 on localhost. I understand from <a href="https://stackoverflow.com/questions/13268942/phpunit-segmentation-fault-11">background reading</a> that this <a href="https://stackoverflow.com/questions/13359821/luajit2-0-0-segmentation-fault-11">could be a result of some unexpected loading</a> into memory, but have <em>no</em> idea where to start trying to troubleshoot - I'm not running any code here, just using the Django ORM in shell. </p> <p>EDIT: I've since tested this further; I'm getting it a lot on a number of different imports. </p> <pre><code>&gt;&gt;&gt; from bisect import * &gt;&gt;&gt; from datetime import date </code></pre> <p>The console log crash report looks like this:</p> <pre><code>Process: Python [28541] Path: /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python Identifier: Python Version: 2.7.5 (2.7.5) Code Type: X86-64 (Native) Parent Process: bash [28528] Responsible: Terminal [2961] User ID: 501 Date/Time: 2013-11-02 16:24:56.399 +0000 OS Version: Mac OS X 10.9 (13A603) Report Version: 11 Anonymous UUID: DACFC213-DBA4-860A-C887-96B155D16223 Sleep/Wake UUID: 0FCC648C-E20C-41CF-AB70-019F755C62CA Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000 VM Regions Near 0: --&gt; __TEXT 0000000100000000-0000000100001000 [ 4K] r-x/rwx SM=COW /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 readline.so 0x00000001025ebf97 call_readline + 647 1 org.python.python 0x0000000100008e22 PyOS_Readline + 274 2 org.python.python 0x00000001000b8315 builtin_raw_input + 597 3 org.python.python 0x00000001000c35fd PyEval_EvalFrameEx + 25213 4 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 5 org.python.python 0x00000001000c31bd PyEval_EvalFrameEx + 24125 6 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 7 org.python.python 0x00000001000c31bd PyEval_EvalFrameEx + 24125 8 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 9 org.python.python 0x00000001000c31bd PyEval_EvalFrameEx + 24125 10 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 11 org.python.python 0x000000010003e510 function_call + 176 12 org.python.python 0x000000010000c932 PyObject_Call + 98 13 org.python.python 0x00000001000be63d PyEval_EvalFrameEx + 4797 14 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 15 org.python.python 0x000000010003e510 function_call + 176 16 org.python.python 0x000000010000c932 PyObject_Call + 98 17 org.python.python 0x00000001000be63d PyEval_EvalFrameEx + 4797 18 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 19 org.python.python 0x000000010003e510 function_call + 176 20 org.python.python 0x000000010000c932 PyObject_Call + 98 21 org.python.python 0x00000001000be63d PyEval_EvalFrameEx + 4797 22 org.python.python 0x00000001000c3fed PyEval_EvalFrameEx + 27757 23 org.python.python 0x00000001000c3fed PyEval_EvalFrameEx + 27757 24 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 25 org.python.python 0x00000001000c31bd PyEval_EvalFrameEx + 24125 26 org.python.python 0x00000001000c58c9 PyEval_EvalCodeEx + 2137 27 org.python.python 0x00000001000c59e6 PyEval_EvalCode + 54 28 org.python.python 0x00000001000ea28e PyRun_FileExFlags + 174 29 org.python.python 0x00000001000ea52a PyRun_SimpleFileExFlags + 458 30 org.python.python 0x00000001001014ed Py_Main + 3101 31 org.python.python 0x0000000100000f14 0x100000000 + 3860 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x000000010074ca40 rcx: 0x0000000100700000 rdx: 0x0000000000001e00 rdi: 0x0000000000000000 rsi: 0x00000001025ec254 rbp: 0x00007fff5fbfd720 rsp: 0x00007fff5fbfd650 r8: 0x0000000100700000 r9: 0x000000000000058a r10: 0x0001000040080003 r11: 0x0000000000000001 r12: 0x0000000000000001 r13: 0x000000000000001c r14: 0x00007fff5fbfd6e0 r15: 0x00007fff5fbfd660 rip: 0x00000001025ebf97 rfl: 0x0000000000010206 cr2: 0x0000000000000000 Logical CPU: 3 Error Code: 0x00000004 Trap Number: 14 Binary Images: 0x100000000 - 0x100000fff +org.python.python (2.7.5 - 2.7.5) &lt;29DAB82B-5BC9-56CE-C09D-AE442FB37EF0&gt; 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/usr/lib/libcrypto.0.9.8.dylib 0x7fff8dc58000 - 0x7fff8dc7fffb libsystem_info.dylib (449.1.3) &lt;7D41A156-D285-3849-A2C3-C04ADE797D98&gt; /usr/lib/system/libsystem_info.dylib 0x7fff8dd1b000 - 0x7fff8dec8f27 libobjc.A.dylib (551.1) &lt;AD7FD984-271E-30F4-A361-6B20319EC73B&gt; /usr/lib/libobjc.A.dylib 0x7fff8dec9000 - 0x7fff8df2cff7 com.apple.SystemConfiguration (1.13 - 1.13) &lt;F05F4149-981B-380B-8F50-51CE804BBB89&gt; /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration 0x7fff8e008000 - 0x7fff8e019ff7 libsystem_asl.dylib (217.1.4) &lt;655FB343-52CF-3E2F-B14D-BEBF5AAEF94D&gt; /usr/lib/system/libsystem_asl.dylib 0x7fff8e461000 - 0x7fff8e488ff7 libsystem_network.dylib (241.3) &lt;8B1E1F1D-A5CC-3BAE-8B1E-ABC84337A364&gt; /usr/lib/system/libsystem_network.dylib 0x7fff8e508000 - 0x7fff8e50fff7 libsystem_pthread.dylib (53.1.4) &lt;AB498556-B555-310E-9041-F67EC9E00E2C&gt; /usr/lib/system/libsystem_pthread.dylib 0x7fff8e58d000 - 0x7fff8e596ff3 libsystem_notify.dylib (121) &lt;52571EC3-6894-37E4-946E-064B021ED44E&gt; /usr/lib/system/libsystem_notify.dylib 0x7fff8ec87000 - 0x7fff8ecabfff libxpc.dylib (300.1.17) &lt;4554927A-9467-365C-91F1-5A116989DD7F&gt; /usr/lib/system/libxpc.dylib 0x7fff8fe32000 - 0x7fff8fe4cfff libdispatch.dylib (339.1.9) &lt;46878A5B-4248-3057-962C-6D4A235EEF31&gt; /usr/lib/system/libdispatch.dylib 0x7fff90580000 - 0x7fff905a9ff7 libc++abi.dylib (48) &lt;8C16158F-CBF8-3BD7-BEF4-022704B2A326&gt; /usr/lib/libc++abi.dylib 0x7fff905aa000 - 0x7fff90762ff3 libicucore.A.dylib (511.25) &lt;3ED7B656-416E-3071-AEC8-E85C90232F78&gt; /usr/lib/libicucore.A.dylib 0x7fff90c0c000 - 0x7fff90c0dffb libremovefile.dylib (33) &lt;3543F917-928E-3DB2-A2F4-7AB73B4970EF&gt; /usr/lib/system/libremovefile.dylib 0x7fff90c0e000 - 0x7fff90c1efff libbsm.0.dylib (33) &lt;2CAC00A2-1352-302A-88FA-C567D4D69179&gt; /usr/lib/libbsm.0.dylib 0x7fff91c8b000 - 0x7fff91c8dff3 libsystem_configuration.dylib (596.12) &lt;C4F633D9-94C8-35D9-BB2D-84C5122533C7&gt; /usr/lib/system/libsystem_configuration.dylib 0x7fff91e16000 - 0x7fff91e1bfff libmacho.dylib (845) &lt;1D2910DF-C036-3A82-A3FD-44FF73B5FF9B&gt; /usr/lib/system/libmacho.dylib 0x7fff920a5000 - 0x7fff920d5fff libncurses.5.4.dylib (42) &lt;BF763D62-9149-37CB-B1D2-F66A2510E6DD&gt; /usr/lib/libncurses.5.4.dylib 0x7fff923d7000 - 0x7fff923f2ff7 libsystem_malloc.dylib (23.1.10) &lt;FFE5C472-B23A-318A-85BF-77CDE61900D1&gt; /usr/lib/system/libsystem_malloc.dylib 0x7fff93322000 - 0x7fff9333eff7 libsystem_kernel.dylib (2422.1.72) &lt;D14913DB-47F1-3591-8DAF-D4B4EF5F8818&gt; /usr/lib/system/libsystem_kernel.dylib 0x7fff941e6000 - 0x7fff941e7ff7 libSystem.B.dylib (1197.1.1) &lt;BFC0DC97-46C6-3BE0-9983-54A98734897A&gt; /usr/lib/libSystem.B.dylib 0x7fff94239000 - 0x7fff94287fff libcorecrypto.dylib (161.1) &lt;F3973C28-14B6-3006-BB2B-00DD7F09ABC7&gt; /usr/lib/system/libcorecrypto.dylib 0x7fff94588000 - 0x7fff945bcfff libssl.0.9.8.dylib (50) &lt;B15F967C-B002-36C2-9621-3456D8509F50&gt; /usr/lib/libssl.0.9.8.dylib External Modification Summary: Calls made by other processes targeting this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 991820 thread_create: 1 thread_set_state: 0 VM Region Summary: ReadOnly portion of Libraries: Total=80.5M resident=22.0M(27%) swapped_out_or_unallocated=58.5M(73%) Writable regions: Total=61.0M written=15.9M(26%) resident=22.2M(36%) swapped_out=0K(0%) unallocated=38.8M(64%) REGION TYPE VIRTUAL =========== ======= Kernel Alloc Once 4K MALLOC 52.5M MALLOC (admin) 16K STACK GUARD 56.0M Stack 8192K VM_ALLOCATE 12K __DATA 2024K __LINKEDIT 66.4M __TEXT 14.1M __UNICODE 544K shared memory 4K =========== ======= TOTAL 199.6M </code></pre> <p>Further edit: <a href="https://stackoverflow.com/questions/18158381/python-crashing-when-running-two-commands?rq=1">There appears to be a known bug on this.</a> I installed Mavericks about 4 days ago, and this has appeared since then; I suspect I can suppress the problem using that Q's solution if no-one's going to tell me otherwise. </p>
 

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