Problem(s) with multiple imports

[oxtopus]

Firstly, I'm on a mac.

I have two schemas. One imports and uses the other. When I import both schemas in Python, I get an error related to "Duplicate IDs", and in some cases, it crashes the python interpreter.

Importing individually is fine:

$ python -c 'from nupic.encoders.delta_capnp import DeltaEncoderProto'
$ python -c 'from nupic.encoders.adaptivescalar_capnp import AdaptiveScalarEncoderProto'

Importing them together raises a KjException related to duplicate IDs:

$ python -c 'from nupic.encoders.delta_capnp import DeltaEncoderProto;from nupic.encoders.adaptivescalar_capnp import AdaptiveScalarEncoderProto'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "capnp/lib/capnp.pyx", line 3773, in capnp.lib.capnp._Loader.load_module (capnp/lib/capnp.cpp:71749)
  File "capnp/lib/capnp.pyx", line 3752, in capnp.lib.capnp.load (capnp/lib/capnp.cpp:71239)
  File "capnp/lib/capnp.pyx", line 3126, in capnp.lib.capnp.SchemaParser.load (capnp/lib/capnp.cpp:63334)
capnp.lib.capnp.KjException: /Users/amarshall/nta/nupic/nupic/encoders/adaptivescalar.capnp:0: failed: Duplicate ID @0xf11485b8c813b489.
stack: 0x10287bcdd 0x10287bd81 0x10270cfdb 0x10270dd84 0x1026e0566 0x1026de612 0x1026de237 0x1026de78d 0x1026e3f90 0x1026e4015 0x1026ed992 0x1026e5fef 0x1026e607d 0x1026e6a86 0x102706b35 0x102706a18

Then, if I change the import in delta.capnp to be relative, I get a segfault:

$ python -c 'from nupic.encoders.delta_capnp import DeltaEncoderProto;from nupic.encoders.adaptivescalar_capnp import AdaptiveScalarEncoderProto'
Segmentation fault: 11

For good measure, just to verify that I didn’t duplicate the ID:

$ cat nupic/encoders/delta.capnp nupic/encoders/adaptivescalar.capnp 
@0xdf5bd1fedf76298f;

using import "/nupic/encoders/adaptivescalar.capnp".AdaptiveScalarEncoderProto;

struct DeltaEncoderProto {
  width @0 :UInt32;
  name @1 :Text;
  n @2 :UInt32;
  adaptiveScalarEnc @3 :AdaptiveScalarEncoderProto;
  prevAbsolute @4 :Float32;
  prevDelta @5 :Float32;
  stateLock @6 :Bool;
}
@0xf11485b8c813b489;

using import "/nupic/movingaverage.capnp".MovingAverageProto;

# Next ID: 10
struct AdaptiveScalarEncoderProto {
  w @0 :UInt32;
  minval @1 :Float32;
  maxval @2 :Float32;
  periodic @3 :Bool;
  n @4 :UInt32;
  name @5 :Text;
  verbosity @6 :UInt8;
  clipInput @7 :Bool;
  recordNum @8 :UInt32;
  slidingWindow @9 :MovingAverageProto;
}
$ git grep f11485b8c813b489
nupic/encoders/adaptivescalar.capnp:@0xf11485b8c813b489;

It’s as if there’s a problem importing AdaptiveScalarEncoderProto a second time. Once implicitly in the delta.capnp schema and again explicitly in python.

I ran into a problem because a test I'm working on that imports both schemas was crashing my Python interpreter. For example, when I run numenta/nupic-legacy@e8ca7b5:

$ python tests/unit/nupic/encoders/scalarspace_test.py 
Segmentation fault: 11

With the crash reporter generating this message:

Process:               Python [8149]
Path:                  /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
Identifier:            Python
Version:               2.7.6 (2.7.6)
Code Type:             X86-64 (Native)
Parent Process:        bash [8128]
Responsible:           Terminal [400]
User ID:               502

PlugIn Path:             /Users/USER/Library/Python/2.7/lib/python/site-packages/pycapnp-0.5.1-py2.7-macosx-10.10-intel.egg/capnp/lib/capnp.so
PlugIn Identifier:       capnp.so
PlugIn Version:          ??? (0)

Date/Time:             2015-04-04 16:26:24.594 -0700
OS Version:            Mac OS X 10.10.2 (14C1514)
Report Version:        11
Anonymous UUID:        FF9C3939-A0B7-61F2-1A9B-6FCF211E857D

Sleep/Wake UUID:       FB51CEAD-3252-471E-A7E1-1347A8DD9267

Time Awake Since Boot: 520000 seconds
Time Since Wake:       1500 seconds

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   capnp.so                        0x0000000107a761a2 char* kj::_::fill<kj::ArrayPtr<char const>, kj::FixedArray<char, 1ul>, kj::ArrayPtr<char const> >(char*, kj::ArrayPtr<char const> const&, kj::FixedArray<char, 1ul>&&, kj::ArrayPtr<char const>&&) + 82
1   capnp.so                        0x0000000107a760db kj::String kj::_::concat<kj::ArrayPtr<char const>, kj::FixedArray<char, 1ul>, kj::ArrayPtr<char const> >(kj::ArrayPtr<char const>&&, kj::FixedArray<char, 1ul>&&, kj::ArrayPtr<char const>&&) + 219
2   capnp.so                        0x0000000107a75feb kj::String kj::str<kj::StringPtr&, char, kj::StringPtr&>(kj::StringPtr&&&, char&&, kj::StringPtr&&&) + 139
3   capnp.so                        0x0000000107a70b13 capnp::(anonymous namespace)::joinPath(kj::StringPtr, kj::StringPtr) + 211
4   capnp.so                        0x0000000107a74e0c capnp::SchemaFile::DiskSchemaFile::import(kj::StringPtr) const + 284
5   capnp.so                        0x0000000107a7687b capnp::SchemaParser::ModuleImpl::importRelative(kj::StringPtr) + 123
6   capnp.so                        0x0000000107a4c221 capnp::compiler::Compiler::CompiledModule::importRelative(kj::StringPtr) + 113
7   capnp.so                        0x0000000107a4c0e4 capnp::compiler::Compiler::Node::resolveImport(kj::StringPtr) + 84
8   capnp.so                        0x0000000107a11273 capnp::compiler::NodeTranslator::BrandScope::compileDeclExpression(capnp::compiler::Expression::Reader, capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::NodeTranslator::ImplicitParams) + 2883
9   capnp.so                        0x0000000107a1203c capnp::compiler::NodeTranslator::BrandScope::compileDeclExpression(capnp::compiler::Expression::Reader, capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::NodeTranslator::ImplicitParams) + 6412
10  capnp.so                        0x0000000107a1b18f capnp::compiler::NodeTranslator::compileDecl(unsigned long long, unsigned int, capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::ErrorReporter&, capnp::compiler::Expression::Reader, capnp::schema::Brand::Builder) + 415
11  capnp.so                        0x0000000107a463ee capnp::compiler::Compiler::Alias::compile() + 606
12  capnp.so                        0x0000000107a4b5a2 capnp::compiler::Compiler::Node::resolveMember(kj::StringPtr) + 1746
13  capnp.so                        0x0000000107a4a712 capnp::compiler::Compiler::Node::resolve(kj::StringPtr) + 162
14  capnp.so                        0x0000000107a4aa74 capnp::compiler::Compiler::Node::resolve(kj::StringPtr) + 1028
15  capnp.so                        0x0000000107a10b5a capnp::compiler::NodeTranslator::BrandScope::compileDeclExpression(capnp::compiler::Expression::Reader, capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::NodeTranslator::ImplicitParams) + 1066
16  capnp.so                        0x0000000107a18e04 capnp::compiler::NodeTranslator::compileDeclExpression(capnp::compiler::Expression::Reader, capnp::compiler::NodeTranslator::ImplicitParams) + 308
17  capnp.so                        0x0000000107a18832 capnp::compiler::NodeTranslator::compileType(capnp::compiler::Expression::Reader, capnp::schema::Type::Builder, capnp::compiler::NodeTranslator::ImplicitParams) + 338
18  capnp.so                        0x0000000107a30128 capnp::compiler::NodeTranslator::StructTranslator::translateInternal(capnp::compiler::NodeTranslator::StructTranslator::MemberInfo&, capnp::schema::Node::Builder) + 1464
19  capnp.so                        0x0000000107a29f51 capnp::compiler::NodeTranslator::StructTranslator::translate(capnp::Void, capnp::List<capnp::compiler::Declaration, (capnp::Kind)3>::Reader, capnp::schema::Node::Builder) + 321
20  capnp.so                        0x0000000107a15dff capnp::compiler::NodeTranslator::compileStruct(capnp::Void, capnp::List<capnp::compiler::Declaration, (capnp::Kind)3>::Reader, capnp::schema::Node::Builder) + 303
21  capnp.so                        0x0000000107a12e2b capnp::compiler::NodeTranslator::compileNode(capnp::compiler::Declaration::Reader, capnp::schema::Node::Builder) + 1371
22  capnp.so                        0x0000000107a127e6 capnp::compiler::NodeTranslator::NodeTranslator(capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::ErrorReporter&, capnp::compiler::Declaration::Reader const&, capnp::Orphan<capnp::schema::Node>, bool) + 582
23  capnp.so                        0x0000000107a1312e capnp::compiler::NodeTranslator::NodeTranslator(capnp::compiler::NodeTranslator::Resolver&, capnp::compiler::ErrorReporter&, capnp::compiler::Declaration::Reader const&, capnp::Orphan<capnp::schema::Node>, bool) + 62
24  capnp.so                        0x0000000107a6513b void kj::ctor<capnp::compiler::NodeTranslator, capnp::compiler::Compiler::Node&, capnp::compiler::ErrorReporter&, capnp::compiler::Declaration::Reader&, capnp::Orphan<capnp::schema::Node>, bool>(capnp::compiler::NodeTranslator&, capnp::compiler::Compiler::Node&&&, capnp::compiler::ErrorReporter&&&, capnp::compiler::Declaration::Reader&&&, capnp::Orphan<capnp::schema::Node>&&, bool&&) + 251
25  capnp.so                        0x0000000107a52097 capnp::compiler::NodeTranslator& kj::Arena::allocate<capnp::compiler::NodeTranslator, capnp::compiler::Compiler::Node&, capnp::compiler::ErrorReporter&, capnp::compiler::Declaration::Reader&, capnp::Orphan<capnp::schema::Node>, bool>(capnp::compiler::Compiler::Node&&&, capnp::compiler::ErrorReporter&&&, capnp::compiler::Declaration::Reader&&&, capnp::Orphan<capnp::schema::Node>&&, bool&&) + 183
26  capnp.so                        0x0000000107a486db capnp::compiler::Compiler::Node::getContent(capnp::compiler::Compiler::Node::Content::State) + 4315
27  capnp.so                        0x0000000107a493d9 capnp::compiler::Compiler::Node::traverse(unsigned int, std::__1::unordered_map<capnp::compiler::Compiler::Node*, unsigned int, std::__1::hash<capnp::compiler::Compiler::Node*>, std::__1::equal_to<capnp::compiler::Compiler::Node*>, std::__1::allocator<std::__1::pair<capnp::compiler::Compiler::Node* const, unsigned int> > >&, capnp::SchemaLoader const&) + 121
28  capnp.so                        0x0000000107a4971b capnp::compiler::Compiler::Node::traverse(unsigned int, std::__1::unordered_map<capnp::compiler::Compiler::Node*, unsigned int, std::__1::hash<capnp::compiler::Compiler::Node*>, std::__1::equal_to<capnp::compiler::Compiler::Node*>, std::__1::allocator<std::__1::pair<capnp::compiler::Compiler::Node* const, unsigned int> > >&, capnp::SchemaLoader const&) + 955
29  capnp.so                        0x0000000107a4edc0 capnp::compiler::Compiler::Impl::eagerlyCompile(unsigned long long, unsigned int, capnp::SchemaLoader const&) + 672
30  capnp.so                        0x0000000107a4f3ae capnp::compiler::Compiler::eagerlyCompile(unsigned long long, unsigned int) const + 126
31  capnp.so                        0x0000000107a6f262 capnp::SchemaParser::parseFile(kj::Own<capnp::SchemaFile>&&) const + 226
32  capnp.so                        0x0000000107a6f0f8 capnp::SchemaParser::parseDiskFile(kj::StringPtr, kj::StringPtr, kj::ArrayPtr<kj::StringPtr const>) const + 168
33  capnp.so                        0x000000010791947c __pyx_f_5capnp_3lib_5capnp_12SchemaParser__parse_disk_file(__pyx_obj_5capnp_3lib_5capnp_SchemaParser*, _object*, _object*, _object*, int) + 1446
34  capnp.so                        0x000000010793ffca __pyx_pw_5capnp_3lib_5capnp_12SchemaParser_7load(_object*, _object*, _object*) + 2086
35  capnp.so                        0x000000010792ab3d __pyx_pw_5capnp_3lib_5capnp_27load(_object*, _object*, _object*) + 701
36  capnp.so                        0x0000000107929848 __pyx_pw_5capnp_3lib_5capnp_7_Loader_3load_module(_object*, _object*, _object*) + 1776
37  org.python.python               0x00000001074e12ac PyObject_Call + 99
38  org.python.python               0x00000001074ec0cf 0x1074d7000 + 86223
39  org.python.python               0x00000001074e12ac PyObject_Call + 99
40  org.python.python               0x00000001074e143d 0x1074d7000 + 42045
41  org.python.python               0x00000001074e164f PyObject_CallMethod + 253
42  org.python.python               0x0000000107572ed7 0x1074d7000 + 638679
43  org.python.python               0x0000000107572aa1 0x1074d7000 + 637601
44  org.python.python               0x0000000107570ce1 PyImport_ImportModuleLevel + 1191
45  org.python.python               0x00000001075563be 0x1074d7000 + 521150
46  org.python.python               0x00000001074e12ac PyObject_Call + 99
47  org.python.python               0x0000000107560d6b PyEval_CallObjectWithKeywords + 93
48  org.python.python               0x000000010755d071 PyEval_EvalFrameEx + 8411
49  org.python.python               0x000000010755ad62 PyEval_EvalCodeEx + 1413
50  org.python.python               0x000000010755a7d7 PyEval_EvalCode + 54
51  org.python.python               0x000000010757a7bd 0x1074d7000 + 669629
52  org.python.python               0x000000010757a860 PyRun_FileExFlags + 133
53  org.python.python               0x000000010757a3fd PyRun_SimpleFileExFlags + 769
54  org.python.python               0x000000010758bb23 Py_Main + 3051
55  libdyld.dylib                   0x00007fff83ec35c9 start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0xe3aa4f5dbdbea870  rbx: 0x000000010923c090  rcx: 0xe3aa4f5dbdbea871  rdx: 0x00007fff58726d20
  rdi: 0x00007fff58726d28  rsi: 0x00007fff58726d28  rbp: 0x00007fff58726c40  rsp: 0x00007fff58726c00
   r8: 0x0000000000000001   r9: 0x0000000000000001  r10: 0x0000000000000000  r11: 0x0000000000000246
  r12: 0x0000000109235b4c  r13: 0x000000010923c090  r14: 0x00007f9248d701c0  r15: 0x0000000000000024
  rip: 0x0000000107a761a2  rfl: 0x0000000000010286  cr2: 0x0000000210b3f829

Logical CPU:     6
Error Code:      0x00000000
Trap Number:     13


Binary Images:
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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: 314641
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=114.9M resident=84.6M(74%) swapped_out_or_unallocated=30.3M(26%)
Writable regions: Total=4.2G written=11.1M(0%) resident=14.6M(0%) swapped_out=0K(0%) unallocated=4.2G(100%)

REGION TYPE                      VIRTUAL
===========                      =======
Kernel Alloc Once                     4K
MALLOC                            175.3M
MALLOC (admin)                       16K
MALLOC_LARGE (reserved)             4.0G        reserved VM address space (unallocated)
STACK GUARD                        56.0M
Stack                              8192K
VM_ALLOCATE                          16K
__DATA                             2640K
__LINKEDIT                         79.3M
__TEXT                             35.6M
__UNICODE                           544K
shared memory                         4K
===========                      =======
TOTAL                               4.3G
TOTAL, minus reserved VM space    357.4M

[jparyani]

Hmm, I'm having a lot of trouble reproducing (specifically I'm getting a Fatal Python error: PyThreadState_Get: no current thread whenever I try to import nupic on my OSX box). That being said, I'm pretty sure I fixed this bug in the 0.5.4 release (see https://github.com/jparyani/pycapnp/blob/develop/CHANGELOG.md#v054-2015-03-02). Can you try that out and let me know if it works for you?

[oxtopus]

Will do. Thanks!

I tried to craft a simpler scenario, but wasn't able to reproduce. FWIW, if you look at the history of numenta/nupic-legacy#2007, the failing Travis builds were related to the same failure (the python interpreter crashed). The crashes stopped and it all started working when I switched to relative imports.

Thanks for trying it out!

[oxtopus]

Upgrading to 0.5.4 did the trick. Thanks!