Hacktoberfest 2026: as issues que os mantenedores marcaram para outubro, abertas e boas para iniciantes. Ver issues do Hacktoberfest

Memory leak with custom style

Aberta
  • Algo errado?
#47 0 comentários 0 reações 0 responsáveis Ver no GitHub

Ninguém assumiu esta issue ainda.

Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
35/100
Tipo de issue
Bug
Clareza
Razoavelmente clara
Status de atividade
Estagnada
Stack de tecnologia
cpp, objective-c
Domínio
devtools

Direção de pesquisa

Reproduza a falha no projeto XcodeClangFormat usando o estilo .clang-format do Blender e o exemplo de C++ de 18 linhas; em seguida, inspecione o caminho de Extension e o ponto de entrada ClangFormatCommand mencionado no trace. Está concluído quando formatar o arquivo uma segunda vez não falhar mais, a Extension não acumular aproximadamente 500 MB e a conexão XPC continuar utilizável.

Escrita pelo modelo de indexação a partir do texto da issue.

Descrição

  • Setup the Xcode project for XcodeClangFormat for debugging.
  • Build the app and set the style to https://github.com/blender/blender/blob/master/.clang-format
  • Run Extension this time and Xcode launches. Wait for the debugger to attach to the extension.
  • New Xcode command line tool project of C++ language.
  • In the C++ file, select all, paste the code given in the summary. [1] it's total 18 lines.
  • Editor > clang format > format entire file. It will format it correctly.
  • Select all again, paste the code still in your clipboard.
  • Editor > clang format > format entire file. It will fail & the original Xcode instance shows memory increase that settles around 500 MB. The trace appears in the console [2] & UI looks like this [3].
[1] Code to copy 
//
//  main.cpp
//  clang-format-test
//
//  Copyright © 2020 ak. All rights reserved.
//

#include <iostream>
#include "main.hh"

int main(int argc, const char *argv[])
{
  // Long comment that must be broken down in multiple lines.
  // insert code here... insert code here... insert code here... insert code here... insert code here... insert code here...
  std::cout << "Hello, World!\n";
  return 0;
}
[2] Trace in console 
2020-08-03 00:39:49.395275+0530 clang-format[6941:258937] [User Defaults] Couldn't read values in CFPrefsPlistSource<0x60b000012c00> (Domain: XcodeClangFormat, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null), Contents Need Refresh: Yes): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsd
2020-08-03 00:40:00.626852+0530 clang-format[6941:258937] [general] <NSXPCConnection: 0x60d000017bb0> connection from pid 6924: Warning: Exception caught during invocation of received message, dropping incoming message and invalidating the connection.
Exception: *** -[__NSArrayM objectAtIndex:]: index 18 beyond bounds [0 .. 17]
*** -[__NSArrayM objectAtIndex:]: index 18 beyond bounds [0 .. 17]
(
	0   CoreFoundation                      0x00007fff46876a7d __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff70f4ba17 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff468b5a74 -[CFPrefsConfigurationFileSource initWithConfigurationPropertyList:containingPreferences:] + 0
	3   CoreFoundation                      0x00007fff467b21de -[CFPrefsSearchListSource addNamedVolatileSourceForIdentifier:] + 0
	4   clang-format                        0x0000000105a5ce7b -[ClangFormatCommand performCommandWithInvocation:completionHandler:] + 9099
	5   XcodeKit                            0x000000010ae192f4 -[_XCSourceEditorService performCommandInvocation:commandIdentifier:request:reply:] + 494
	6   Foundation                          0x00007fff48a8da0b __NSXPCCONNECTION_IS_CALLING_OUT_TO_EXPORTED_OBJECT_S4__ + 12
	7   Foundation                          0x00007fff48a3298f -[NSXPCConnection _decodeAndInvokeMessageWithEvent:flags:] + 2499
	8   Foundation                          0x00007fff48a31d63 message_handler + 215
	9   libxpc.dylib                        0x00007fff7294df08 _xpc_connection_call_event_handler + 56
	10  libxpc.dylib                        0x00007fff7294be9e _xpc_connection_mach_event + 933
	11  libdispatch.dylib                   0x00007fff726cc6dd _dispatch_client_callout4 + 9
	12  libdispatch.dylib                   0x00007fff726e10d6 _dispatch_mach_msg_invoke + 436
	13  libdispatch.dylib                   0x00007fff726d2792 _dispatch_lane_serial_drain + 268
	14  libdispatch.dylib                   0x00007fff726e1c19 _dispatch_mach_invoke + 481
	15  libdispatch.dylib                   0x00007fff726d2792 _dispatch_lane_serial_drain + 268
	16  libdispatch.dylib                   0x00007fff726d33c6 _dispatch_lane_invoke + 433
	17  libdispatch.dylib                   0x00007fff726db6ed _dispatch_workloop_worker_thread + 598
	18  libsystem_pthread.dylib             0x00007fff7290c611 _pthread_wqthread + 421
	19  libsystem_pthread.dylib             0x00007fff7290c3fd start_wqthread + 13
)
[3] UI looks like

Screenshot 2020-08-03

Linguagem predominante
Objective-C++
Estrelas
806
Forks
102
Nenhum PR com merge em 30d

Preparar o ambiente

Primeiros passos

  1. Leia a issue inteira e depois o guia de contribuição do projeto.
  2. Comente na issue dizendo que vai assumir — evita que duas pessoas façam o mesmo trabalho.
  3. Faça um fork do repositório e trabalhe em uma branch.
  4. Abra um pull request que referencie o número da issue.

Mais de mapbox/XcodeClangFormat

Todas as issues de mapbox/XcodeClangFormat

Issues semelhantes

Mais issues de DevTools

Receba novas issues na sua caixa de entrada

Um resumo curto de issues do GitHub para quem está começando.