What is going on here?
ArcGIS`std::__1::map<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type, Esri_runtimecore::HAL::Vertex_attributes::Vertex_element, std::__1::less<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type>, std::__1::allocator<std::__1::pair<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type const, Esri_runtimecore::HAL::Vertex_attributes::Vertex_element> > >::at:
0x10d27acf0 <+0>: pushq %rbp
0x10d27acf1 <+1>: movq %rsp, %rbp
0x10d27acf4 <+4>: pushq %r14
0x10d27acf6 <+6>: pushq %rbx
0x10d27acf7 <+7>: subq $0x10, %rsp
0x10d27acfb <+11>: movq %rsi, %rax
0x10d27acfe <+14>: leaq -0x18(%rbp), %rsi
0x10d27ad02 <+18>: movq %rax, %rdx
0x10d27ad05 <+21>: callq 0x10d27b492 ; std::__1::map<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type, Esri_runtimecore::HAL::Vertex_attributes::Vertex_element, std::__1::less<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type>, std::__1::allocator<std::__1::pair<Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type const, Esri_runtimecore::HAL::Vertex_attributes::Vertex_element> > >::__find_equal_key(std::__1::__tree_node_base<void*>*&, Esri_runtimecore::HAL::Vertex_attributes::Vertex_element_type const&) const
-> 0x10d27ad0a <+26>: testq %rax, %rax
0x10d27ad0d <+29>: je 0x10d27ad1c ; <+44>
0x10d27ad0f <+31>: addq $0x28, %rax
0x10d27ad13 <+35>: addq $0x10, %rsp
0x10d27ad17 <+39>: popq %rbx
0x10d27ad18 <+40>: popq %r14
0x10d27ad1a <+42>: popq %rbp
0x10d27ad1b <+43>: retq
0x10d27ad1c <+44>: movl $0x10, %edi
0x10d27ad21 <+49>: callq 0x10e632b40 ; symbol stub for: __cxa_allocate_exception
0x10d27ad26 <+54>: movq %rax, %rbx
0x10d27ad29 <+57>: leaq 0x149043a(%rip), %rsi ; "map::at: key not found"
0x10d27ad30 <+64>: movq %rbx, %rdi
0x10d27ad33 <+67>: callq 0x10e631e80 ; symbol stub for: std::logic_error::logic_error(char const*)
0x10d27ad38 <+72>: movq 0x1ff1af9(%rip), %rax ; (void *)0x000000010c192ec8: vtable for std::out_of_range
0x10d27ad3f <+79>: addq $0x10, %rax
0x10d27ad43 <+83>: movq %rax, (%rbx)
0x10d27ad46 <+86>: movq 0x1ff18ab(%rip), %rsi ; (void *)0x000000010c192ef0: typeinfo for std::out_of_range
0x10d27ad4d <+93>: movq 0x1ff158c(%rip), %rdx ; (void *)0x000000010c18d894: std::out_of_range::~out_of_range()
0x10d27ad54 <+100>: movq %rbx, %rdi
0x10d27ad57 <+103>: callq 0x10e632b82 ; symbol stub for: __cxa_throw
0x10d27ad5c <+108>: movq %rax, %r14
0x10d27ad5f <+111>: movq %rbx, %rdi
0x10d27ad62 <+114>: callq 0x10e632b5e ; symbol stub for: __cxa_free_exception
0x10d27ad67 <+119>: movq %r14, %rdi
0x10d27ad6a <+122>: callq 0x10e632486 ; symbol stub for: _Unwind_Resume
0x10d27ad6f <+127>: nop
