Hi guys, I am experiencing a _very_ strange segfault during JSON encoding of message:
``` Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 27946] 0x0000000001e4b81a in std::__detail::_Hashtable_ebo_helper<1, capnp::(anonymous namespace)::TypeHash, true>::_S_cget(std::__detail::_Hashtable_ebo_helper<1, capnp::(anonymous namespace)::TypeHash, true> const&) () (gdb) bt #0 0x0000000001e4b81a in std::__detail::_Hashtable_ebo_helper<1, capnp::(anonymous namespace)::TypeHash, true>::_S_cget(std::__detail::_Hashtable_ebo_helper<1, capnp::(anonymous namespace)::TypeHash, true> const&) () #1 0x0000000001e4b11a in std::__detail::_Hash_code_base<capnp::Type, std::pair<capnp::Type const, capnp::JsonCodec::HandlerBase*>, std::__detail::_Select1st, capnp::(anonymous namespace)::TypeHash, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, true>::_M_h1() const () #2 0x0000000001e4a976 in std::__detail::_Hash_code_base<capnp::Type, std::pair<capnp::Type const, capnp::JsonCodec::HandlerBase*>, std::__detail::_Select1st, capnp::(anonymous namespace)::TypeHash, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, true>::_M_hash_code(capnp::Type const&) const () #3 0x0000000001e4a401 in std::_Hashtable<capnp::Type, std::pair<capnp::Type const, capnp::JsonCodec::HandlerBase*>, std::allocator<std::pair<capnp::Type const, capnp::JsonCodec::HandlerBase*> >, std::__detail::_Select1st, std::equal_to<capnp::Type>, capnp::(anonymous namespace)::TypeHash, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >::find(capnp::Type const&) const () #4 0x0000000001e483a3 in std::unordered_map<capnp::Type, capnp::JsonCodec::HandlerBase*, capnp::(anonymous namespace)::TypeHash, std::equal_to<capnp::Type>, std::allocator<std::pair<capnp::Type const, capnp::JsonCodec::HandlerBase*> > >::find(capnp::Type const&) const () #5 0x0000000001e443d5 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #6 0x0000000001e44a6f in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #7 0x0000000001e45a36 in capnp::JsonCodec::encodeField(capnp::StructSchema::Field, capnp::DynamicValue::Reader, capnp::JsonValue::Builder) const () #8 0x0000000001e45377 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #9 0x0000000001e45a36 in capnp::JsonCodec::encodeField(capnp::StructSchema::Field, capnp::DynamicValue::Reader, capnp::JsonValue::Builder) const () #10 0x0000000001e45377 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #11 0x0000000001e45a36 in capnp::JsonCodec::encodeField(capnp::StructSchema::Field, capnp::DynamicValue::Reader, capnp::JsonValue::Builder) const () #12 0x0000000001e45377 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #13 0x0000000001e45a36 in capnp::JsonCodec::encodeField(capnp::StructSchema::Field, capnp::DynamicValue::Reader, capnp::JsonValue::Builder) const () #14 0x0000000001e45618 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #15 0x0000000001e45a36 in capnp::JsonCodec::encodeField(capnp::StructSchema::Field, capnp::DynamicValue::Reader, capnp::JsonValue::Builder) const () #16 0x0000000001e45618 in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type, capnp::JsonValue::Builder) const () #17 0x0000000001e43fcc in capnp::JsonCodec::encode(capnp::DynamicValue::Reader, capnp::Type) const () #18 0x00000000009e02c7 in capnp::JsonCodec::encode<Message::Builder const&> (this=0x7ffff22e1210, value=...) at /home/marc/.../capnp/compat/json.h:216 ``` That's about all that I can get, even though capnproto is compiled with DEBUG. The message trying to be encoded (sorry, I am not sure I can share the entire set of schemas), is a series of simple objects, which in the inner-most object contains a list that is initialized normally: 115 s.initIfaceType(1); The funny part; not initializing it, doesn't make JsonCodec crash. But initializing it, or initializing it + setting a value (valid one), produces the crash always. Valgrind etc... doesn't complain until that point. I am trying to isolate the problem, to make it reproducible, but I am not able yet. Any ideas on this? Thanks -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/capnproto.
