Bug inside dragonfly connection

[dranikpg]

Steps to reproduce on latest main:

pytest dragonfly/replication_test.py -svx -k 'all'

Crashes with

dragonfly: _deps/abseil_cpp-src/absl/container/inlined_vector.h:321: absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6>::operator[](absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6>::size_type)::<lambda()>: Assertion `false && "i < size()"' failed.

To view the ibacktrace:

pytest dragonfly/replication_test.py -svx -k 'all' --gdb 
fg 1
bt

Gives

#13 0x00007ffff6c81e26 in __GI___assert_fail (assertion=0x555557ef0136 "false && \"i < size()\"", file=0x555557eeff88 "_deps/abseil_cpp-src/absl/container/inlined_vector.h", line=321, 
    function=0x555557ef0088 "absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6>::operator[](absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6>::size_type)::<lambda()>") at assert.c:101
#14 0x0000555557839912 in absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6ul, std::allocator<absl::lts_20220623::Span<char> > >::operator[](unsigned long)::{lambda()#1}::operator()() const (__closure=0x7fffe808b3e7)
    at _deps/abseil_cpp-src/absl/container/inlined_vector.h:321
#15 0x0000555557839987 in absl::lts_20220623::InlinedVector<absl::lts_20220623::Span<char>, 6ul, std::allocator<absl::lts_20220623::Span<char> > >::operator[] (this=0x567f8260380, i=9)
    at _deps/abseil_cpp-src/absl/container/inlined_vector.h:321
#16 0x000055555781627a in facade::Connection::Request::SetArgs (this=0x567f8260380, args=std::vector of length 14, capacity 16 = {...}) at ../src/facade/dragonfly_connection.cc:185
#17 0x0000555557816967 in facade::Connection::Request::Emplace (this=0x567f8260380, args=std::vector of length 14, capacity 16 = {...}, capacity=43) at ../src/facade/dragonfly_connection.cc:216
#18 0x000055555782bb1f in facade::Connection::FromArgs (this=0x7fffe006c580, args=std::vector of length 14, capacity 16 = {...}, heap=0x7ffff66d4000) at ../src/facade/dragonfly_connection.cc:792
#19 0x0000555557823f31 in facade::Connection::ParseRedis (this=0x7fffe006c580) at ../src/facade/dragonfly_connection.cc:534
#20 0x0000555557827506 in facade::Connection::IoLoop (this=0x7fffe006c580, peer=0x7fffe006c550) at ../src/facade/dragonfly_connection.cc:652
#21 0x0000555557820818 in facade::Connection::ConnectionFlow (this=0x7fffe006c580, peer=0x7fffe006c550) at ../src/facade/dragonfly_connection.cc:451
#22 0x000055555781c81b in facade::Connection::HandleRequests (this=0x7fffe006c580) at ../src/facade/dragonfly_connection.cc:348
#23 0x0000555557b7c1a9 in util::ListenerInterface::RunSingleConnection (this=0x5555593f7c00, conn=0x7fffe006c580) at ../helio/util/listener_interface.cc:169
#24 0x0000555557b77c89 in operator() (__closure=0x7fffe808bd60) at ../helio/util/listener_interface.cc:116
#25 0x0000555557b8fb8c in std::__invoke_impl<void, util::ListenerInterface::RunAcceptLoop()::<lambda()> >(std::__invoke_other, struct {...} &&) (__f=...) at /usr/include/c++/11/bits/invoke.h:61