Memory leak with custom style

Chưa có ai nhận issue này.

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

Tái hiện lỗi trong dự án XcodeClangFormat bằng style .clang-format của Blender và ví dụ C++ gồm 18 dòng, sau đó kiểm tra đường dẫn Extension và entry point ClangFormatCommand được nêu trong trace. Được xem là hoàn tất khi việc format file lần thứ hai không còn thất bại, Extension không tích lũy khoảng 500 MB và kết nối XPC vẫn có thể sử dụng.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.

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