Segmentation fault on bucket print (last) in ppdemo.cpp (default compile command on MacOS)

[ktsiam]

[Alexander Shukaev]

Call stack traceback?

[ktsiam]

It's when I call it with no arguments. If I call it with arguments it works fine.

Valgrind output:
==64859== Memcheck, a memory error detector
==64859== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==64859== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==64859== Command: ./ppdemo
==64859==
Printing pairs.
Vector: []
Incremental vector: []
Pairs: []
Another vector: || ||
Set: {}
OMap: []
UMap: []
String:
Array: [h, e, l, l, o]
Valarray: [1, -0.5, 0.25, -0.125]
Reusable delimiters: <>
Custom, type-erased delimiters: <>
Custom, type-erased delimiters: <1729>
Custom, type-erased delimiters: <Qrgh; (Jello, 9); 11>
Static C array: [1, 4, 9, 16]
Static C array: [2]
Static C array with length: [4, 9]
Pair: (Jello, 9)
0-tuple: ()
1-tuple: (1729)
n-tuple: (Qrgh, (Jello, 9), 11)
n-tuple: (1729, 2875, (1.5, abc))
==64859== Invalid read of size 8
==64859== at 0x100005DD3: pretty_print::print_container_helper<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > >, char, std::__1::char_traits, pretty_print::delimiters<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > >, char> >::printer<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > > >::print_body(pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > > const&, std::__1::basic_ostream<char, std::__1::char_traits >&) (in ./ppdemo)
==64859== by 0x1000026CC: main (in ./ppdemo)
==64859== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==64859==
==64859==
==64859== Process terminating with default action of signal 11 (SIGSEGV)
==64859== Access not within mapped region at address 0x0
==64859== at 0x100005DD3: pretty_print::print_container_helper<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > >, char, std::__1::char_traits, pretty_print::delimiters<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > >, char> >::printer<pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > > >::print_body(pretty_print::bucket_print_wrapper<std::__1::unordered_map<int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, std::__1::hash, std::__1::equal_to, std::__1::allocator<std::__1::pair<int const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > > > > > const&, std::__1::basic_ostream<char, std::__1::char_traits >&) (in ./ppdemo)
==64859== by 0x1000026CC: main (in ./ppdemo)
==64859== If you believe this happened as a result of a stack
==64859== overflow in your program's main thread (unlikely but
==64859== possible), you can try to increase the size of the
==64859== main thread stack using the --main-stacksize= flag.
==64859== The main thread stack size used in this run was 8388608.
==64859==
==64859== HEAP SUMMARY:
==64859== in use at exit: 22,785 bytes in 167 blocks
==64859== total heap usage: 191 allocs, 24 frees, 31,281 bytes allocated
==64859==
==64859== LEAK SUMMARY:
==64859== definitely lost: 0 bytes in 0 blocks
==64859== indirectly lost: 0 bytes in 0 blocks
==64859== possibly lost: 72 bytes in 3 blocks
==64859== still reachable: 4,476 bytes in 11 blocks
==64859== suppressed: 18,237 bytes in 153 blocks
==64859== Rerun with --leak-check=full to see details of leaked memory
==64859==
==64859== For counts of detected and suppressed errors, rerun with: -v
==64859== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 1 from 1)
Segmentation fault: 11