[BUG][CRASH] Signal: 11 (SEGV)

[vbauerster]

[BUG][CRASH] Signal: 11 (SEGV)

[krobelus]

proposed fix here

[mawww]

Cannot see what might be going on here, next time it reproduces and you have it in gdb, would you be able to see where we are in frame #5, and what list of strings we have passed to #2 ?

I think we are inside one of the on_key_with_auto_info calls that then call insert, but I cannot see how either of them (the one at input_handler.cpp:1308 and the one at input_handler.cpp:1361) would generate either and empty ArrayView or a bad string.

[vbauerster]

Sorry I never used gdb before and already recompiled kakoune so I suppose some info might have been lost. How do I check list of strings we have passed to #2 in gdb? Will it help if I attach zst file coredumpctl info is referring to?

[vbauerster]

Got same crash today with Kakoune 2024.05.18-113-g202747e6. I hope following gives answers to your questions. If it's not enough, pls let me know.

(gdb) bt
#0  Kakoune::fnv1a (data=0x5b2b26e22198 "", len=18446744073709551523) at src/hash.hh:20
#1  Kakoune::hash_value (str=<synthetic pointer>...) at src/string.hh:26
#2  Kakoune::StringData::Registry::intern (this=0x7ffeaa49b600, str=...) at src/shared_string.cc:23
#3  0x00005b2b0348730a in Kakoune::intern (str=...) at src/shared_string.hh:83
#4  Kakoune::Buffer::insert (this=this@entry=0x5b2b26c738e0, pos=..., content=...) at src/buffer.cc:514
#5  0x00005b2b03634c02 in Kakoune::insert (buffer=..., sel=..., pos=..., content=...) at src/selection.cc:433
#6  0x00005b2b03637e53 in Kakoune::FunctionRef<void(unsigned long, Kakoune::Selection&)>::operator() (this=<synthetic pointer>, args#0=<optimized out>, args#1=...) at src/utils.hh:191
#7  Kakoune::SelectionList::for_each (this=this@entry=0x5b2b26c44420, func=..., may_append=may_append@entry=false) at src/selection.cc:406
#8  0x00005b2b0357e71a in Kakoune::InputModes::Insert::insert<Kakoune::String> (this=0x5b2b26e03840, strings=...) at src/utils.hh:184
#9  Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}::operator()(Kakoune::Key, Kakoune::Context&) const (__closure=<optimized out>, key=...) at src/input_handler.cc:1313
#10 Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::Input
Modes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}::operator()(Kakoune::Key, Kakoune::Context&) (
    __closure=<optimized out>, key=..., context=...) at src/input_handler.hh:201
#11 std::__invoke_impl<void, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::K
eymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key, Kakoune::Conte
xt&>(std::__invoke_other, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::Keym
apMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key&&, Kakoune::Contex
t&) (__f=...) at /usr/include/c++/14.2.1/bits/invoke.h:61
#12 std::__invoke_r<void, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::Keym
apMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key, Kakoune::Context&
>(Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputMo
des::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key&&, Kakoune::Context&) (__fn=...)
    at /usr/include/c++/14.2.1/bits/invoke.h:111
#13 std::_Function_handler<void (Kakoune::Key, Kakoune::Context&), Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context c
onst&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Conte
xt&)#1}>::_M_invoke(std::_Any_data const&, Kakoune::Key&&, Kakoune::Context&) (__functor=..., __args#0=..., __args#1=...) at /usr/include/c++/14.2.1/bits/std_function.h:290
#14 0x00005b2b0357333c in std::function<void(Kakoune::Key, Kakoune::Context&)>::operator() (this=0x5b2b26c74f20, __args#0=..., __args#1=...) at /usr/include/c++/14.2.1/bits/std_function.h:591
#15 Kakoune::InputModes::NextKey::on_key (this=0x5b2b26c74ef0, key=...) at src/input_handler.cc:1141
#16 0x00005b2b0356d8b0 in Kakoune::InputMode::handle_key (this=0x5b2b26c74ef0, key=..., synthesized=true) at src/input_handler.cc:32
#17 operator() (__closure=<synthetic pointer>, k=..., synthesized=true) at src/input_handler.cc:1668
#18 Kakoune::InputHandler::handle_key (this=this@entry=0x5b2b26c443b0, key=..., synthesized=synthesized@entry=false) at src/input_handler.cc:1677
#19 0x00005b2b034a1aff in Kakoune::Client::process_pending_inputs (this=this@entry=0x5b2b26c44340) at src/client.cc:114
#20 0x00005b2b034a79e3 in Kakoune::ClientManager::process_pending_inputs (this=this@entry=0x7ffeaa49b740) at src/client_manager.cc:111
#21 0x00005b2b035c5788 in Kakoune::run_server (session=..., server_init=..., client_init=..., init_buffer=..., init_coord=..., flags=Kakoune::ServerFlags::None, ui_type=Kakoune::UIType::Terminal,
    debug_flags=Kakoune::DebugFlags::None, files=...) at src/main.cc:913
#22 0x00005b2b03479b5d in main (argc=<optimized out>, argv=<optimized out>) at src/main.cc:1257
(gdb) f 5
#5  0x00005b2b03634c02 in Kakoune::insert (buffer=..., sel=..., pos=..., content=...) at src/selection.cc:433
433         auto range = buffer.insert(pos, content);
(gdb) info locals
range = <optimized out>
(gdb) f 2
#2  Kakoune::StringData::Registry::intern (this=0x7ffeaa49b600, str=...) at src/shared_string.cc:23
23          return intern(str, hash_value(str));
(gdb) info locals
No locals.
(gdb)

[vbauerster]

Screencast.from.2024-08-27.17-05-01.webm

Bottom pane shows my key presses. Basically what I did is C<a-i>bcfmt.Spr<tab><c-r>". It's constantly reproducible on my side, of course there are kak-lsp and gopls involved. My gopls setup is like below:

[language_server.gopls]
filetypes = ["go"]
roots = ["Gopkg.toml", "go.mod", ".git", ".hg"]
[language_server.gopls.settings.gopls]
hints.assignVariableTypes = true
hints.compositeLiteralFields = true
hints.compositeLiteralTypes = true
hints.constantValues = true
hints.functionTypeParameters = true
hints.parameterNames = true
hints.rangeVariableTypes = true
"ui.completion.usePlaceholders" = true
"ui.semanticTokens" = true

[mawww]

Unfortunately I cannot yet make sense of what is happening, the issue seems to be that whatever is in the default register " is invalid, either we have an empty list of strings, but this should be prevented by the logic in StaticRegister::get(), or we have a corrupted string. The string we pass to fnv1 has an invalid length, 18446744073709551523, which would be -93 if signed.

My intuition is that somehow lsp-snippets-select-next-placeholders corrupts the yanked data but I cannot see how, would you be able to reproduce while running Kakoune in valgrind or with asan enabled (build with make sanitize=address) and see if that gives some extra output ?

[krobelus]

C<a-i>bcfmt.Spr<tab><c-r>"

The screen recording looks like you pressed <c-n> instead of <tab>
(unless you mapped <tab> to that).

If I type fmt.Spr<c-n><tab> where tab is mapped to lsp-snippets-select-next-placeholders,
then I get fmt.Sprint() with the cursor at the end.
(IOW, lsp-snippets-select-next-placeholders is useless/unnecessary for the first argument.)

I'm trying to reproduce; can you reduce your config, ideally trigger it with an empty HOME?
I saw that you use lsp-inlay-hints-enable, maybe that causes issues.

[krobelus]

ok I can reproduce with <c-n>, will look at it later

[vbauerster]

The screen recording looks like you pressed <c-n> instead of <tab>
(unless you mapped <tab> to that).

That's correct, my <tab> is remapped like:

hook global InsertCompletionShow '.*' %{
  map window insert <tab> <c-n>
  map window insert <s-tab> <c-p>
  hook -once -always window InsertCompletionHide '.*' %{
    unmap window insert <tab>
    unmap window insert <s-tab>
  }
}

I saw that you use lsp-inlay-hints-enable, maybe that causes issues.

It doesn't matter, same happens with disabled lsp-inlay-hints.

If I do just <a-i>bcfmt.Spr<tab><c-r>" without C first then I have a corrupted result:

[krobelus]

it's a use-after free of the unnamed register.
It's connected to the super complex InsertCompletionHide hook (for LSP snippet completions) which runs just before <c-r>" is executed, because if I remove that hook the problem goes away.
Looking closer..

�[1m�[31m==11408==ERROR: AddressSanitizer: heap-use-after-free on address 0x5040000860a7 at pc 0x57dbf869e7c1 bp 0x7fffef3bf5e0 sp 0x7fffef3bf5d0
�[1m�[0m�[1m�[34mREAD of size 1 at 0x5040000860a7 thread T0�[1m�[0m
    #0 0x57dbf869e7c0 in Kakoune::String::Data::is_long() const src/string.hh:187
    #1 0x57dbf869e7c0 in Kakoune::String::Data::data() const src/string.hh:191
    #2 0x57dbf869e7c0 in Kakoune::String::data() const src/string.hh:138
    #3 0x57dbf869e7c0 in Kakoune::StringView::StringView(Kakoune::String const&) src/string.hh:254
    #4 0x57dbf869e7c0 in Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>)::{lambda(unsigned long, Kakoune::Selection&)#1}::operator()(unsigned long, Kakoune::Selection&) const src/input_handler.cc:1433
    #5 0x57dbf869e7c0 in Kakoune::FunctionRef<void (unsigned long, Kakoune::Selection&)>::FunctionRef<Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>)::{lambda(unsigned long, Kakoune::Selection&)#1}>(Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>)::{lambda(unsigned long, Kakoune::Selection&)#1}&&)::{lambda(void*, unsigned long, Kakoune::Selection&)#1}::operator()(void*, unsigned long, Kakoune::Selection&) const src/utils.hh:187
    #6 0x57dbf869e7c0 in Kakoune::FunctionRef<void (unsigned long, Kakoune::Selection&)>::FunctionRef<Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>)::{lambda(unsigned long, Kakoune::Selection&)#1}>(Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>)::{lambda(unsigned long, Kakoune::Selection&)#1}&&)::{lambda(void*, unsigned long, Kakoune::Selection&)#1}::_FUN(void*, unsigned long, Kakoune::Selection&) src/utils.hh:186
    #7 0x57dbf89cc16f in Kakoune::FunctionRef<void (unsigned long, Kakoune::Selection&)>::operator()(unsigned long, Kakoune::Selection&) const src/utils.hh:193
    #8 0x57dbf89cc16f in Kakoune::SelectionList::for_each(Kakoune::FunctionRef<void (unsigned long, Kakoune::Selection&)>, bool) src/selection.cc:406
    #9 0x57dbf8703541 in void Kakoune::InputModes::Insert::insert<Kakoune::String>(Kakoune::ArrayView<Kakoune::String const>) src/input_handler.cc:1431
    #10 0x57dbf8703541 in Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}::operator()(Kakoune::Key, Kakoune::Context&) const src/input_handler.cc:1317
    #11 0x57dbf8703541 in Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}::operator()(Kakoune::Key, Kakoune::Context&) src/input_handler.hh:204
    #12 0x57dbf8703541 in void std::__invoke_impl<void, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key, Kakoune::Context&>(std::__invoke_other, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key&&, Kakoune::Context&) /usr/include/c++/14.1.1/bits/invoke.h:61
    #13 0x57dbf8703541 in std::enable_if<is_invocable_r_v<void, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key, Kakoune::Context&>, void>::type std::__invoke_r<void, Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key, Kakoune::Context&>(Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}&, Kakoune::Key&&, Kakoune::Context&) /usr/include/c++/14.1.1/bits/invoke.h:111
    #14 0x57dbf8703541 in std::_Function_handler<void (Kakoune::Key, Kakoune::Context&), Kakoune::on_next_key_with_autoinfo<Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>(Kakoune::Context const&, Kakoune::StringView, Kakoune::KeymapMode, Kakoune::InputModes::Insert::on_key(Kakoune::Key, bool)::{lambda(Kakoune::Key, Kakoune::Context&)#1}, Kakoune::String, Kakoune::String)::{lambda(Kakoune::Key, Kakoune::Context&)#1}>::_M_invoke(std::_Any_data const&, Kakoune::Key&&, Kakoune::Context&) /usr/include/c++/14.1.1/bits/std_function.h:290
    #15 0x57dbf86a8cbb in std::function<void (Kakoune::Key, Kakoune::Context&)>::operator()(Kakoune::Key, Kakoune::Context&) const /usr/include/c++/14.1.1/bits/std_function.h:591
    #16 0x57dbf86a8cbb in Kakoune::InputModes::NextKey::on_key(Kakoune::Key, bool) src/input_handler.cc:1145
    #17 0x57dbf8690940 in Kakoune::InputMode::handle_key(Kakoune::Key, bool) src/input_handler.cc:32
    #18 0x57dbf8690940 in operator() src/input_handler.cc:1673
    #19 0x57dbf8690940 in Kakoune::InputHandler::handle_key(Kakoune::Key, bool) src/input_handler.cc:1688
    #20 0x57dbf8741248 in Kakoune::Client::process_pending_inputs() src/client.cc:114
    #21 0x57dbf8640c47 in Kakoune::ClientManager::process_pending_inputs() src/client_manager.cc:116
    #22 0x57dbf8014c5b in Kakoune::run_server(Kakoune::StringView, Kakoune::StringView, Kakoune::StringView, Kakoune::StringView, Kakoune::Optional<Kakoune::BufferCoord>, Kakoune::ServerFlags, Kakoune::UIType, Kakoune::DebugFlags, Kakoune::ArrayView<Kakoune::StringView const>, int&) src/main.cc:947
    #23 0x57dbf7f80235 in main src/main.cc:1289
    #24 0x7ff61ea34e07  (/usr/lib/libc.so.6+0x25e07) (BuildId: 3de7fd3e8d993406afdcb908e63b88f2f4effea9)
    #25 0x7ff61ea34ecb in __libc_start_main (/usr/lib/libc.so.6+0x25ecb) (BuildId: 3de7fd3e8d993406afdcb908e63b88f2f4effea9)
    #26 0x57dbf7f94ff4 in _start (/home/johannes/git/kakoune/src/kak.opt.san_a+0x130ff4) (BuildId: 944b97c659e9aafc70648d2e3dc740ce322531f8)

�[1m�[32m0x5040000860a7 is located 23 bytes inside of 48-byte region [0x504000086090,0x5040000860c0)
�[1m�[0m�[1m�[35mfreed by thread T0 here:�[1m�[0m
    #0 0x7ff61f0ff0ca in operator delete(void*) /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_new_delete.cpp:152
    #1 0x57dbf84ccc2f in Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16>::deallocate(Kakoune::String*, unsigned long) src/memory.hh:126
    #2 0x57dbf84ccc2f in std::allocator_traits<Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::deallocate(Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16>&, Kakoune::String*, unsigned long) /usr/include/c++/14.1.1/bits/alloc_traits.h:361
    #3 0x57dbf84ccc2f in std::_Vector_base<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_deallocate(Kakoune::String*, unsigned long) /usr/include/c++/14.1.1/bits/stl_vector.h:389
    #4 0x57dbf84ccc2f in std::_Vector_base<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_deallocate(Kakoune::String*, unsigned long) /usr/include/c++/14.1.1/bits/stl_vector.h:385
    #5 0x57dbf84ccc2f in void std::vector<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_assign_aux<Kakoune::String const*>(Kakoune::String const*, Kakoune::String const*, std::forward_iterator_tag) /usr/include/c++/14.1.1/bits/vector.tcc:335
    #6 0x57dbf84ccc2f in void std::vector<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::assign<Kakoune::String const*, void>(Kakoune::String const*, Kakoune::String const*) /usr/include/c++/14.1.1/bits/stl_vector.h:829
    #7 0x57dbf84ccc2f in Kakoune::StaticRegister::set(Kakoune::Context&, Kakoune::ArrayView<Kakoune::String const>, bool) src/register_manager.cc:25

�[1m�[35mpreviously allocated by thread T0 here:�[1m�[0m
    #0 0x7ff61f0fe4f2 in operator new(unsigned long) /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_new_delete.cpp:95
    #1 0x57dbf84cc5ab in Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16>::allocate(unsigned long) src/memory.hh:119
    #2 0x57dbf84cc5ab in std::allocator_traits<Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::allocate(Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16>&, unsigned long) /usr/include/c++/14.1.1/bits/alloc_traits.h:334
    #3 0x57dbf84cc5ab in std::_Vector_base<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_allocate(unsigned long) /usr/include/c++/14.1.1/bits/stl_vector.h:380
    #4 0x57dbf84cc5ab in Kakoune::String* std::vector<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_allocate_and_copy<Kakoune::String const*>(unsigned long, Kakoune::String const*, Kakoune::String const*) /usr/include/c++/14.1.1/bits/stl_vector.h:1621
    #5 0x57dbf84cc5ab in void std::vector<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::_M_assign_aux<Kakoune::String const*>(Kakoune::String const*, Kakoune::String const*, std::forward_iterator_tag) /usr/include/c++/14.1.1/bits/vector.tcc:331
    #6 0x57dbf84cc5ab in void std::vector<Kakoune::String, Kakoune::Allocator<Kakoune::String, (Kakoune::MemoryDomain)16> >::assign<Kakoune::String const*, void>(Kakoune::String const*, Kakoune::String const*) /usr/include/c++/14.1.1/bits/stl_vector.h:829
    #7 0x57dbf84cc5ab in Kakoune::StaticRegister::set(Kakoune::Context&, Kakoune::ArrayView<Kakoune::String const>, bool) src/register_manager.cc:25

[krobelus]

here's a reproducer:

# Repro: OI<c-n><c-r>"
hook global InsertCompletionHide .+ %{
	evaluate-commands -draft -save-regs '"' %{
		set-register dquote foo bar
	}
}