[Bug] - iOS app crash

[yedexiong]

Summary

Platform(s)

<iOS>

Happens on Mail Server

<Gmail>
<iCloud>

Piece of code

#19 Thread

SIGABRT

0
libsystem_kernel.dylib
___pthread_kill + 8

3
libsystem_c.dylib
_err
4
libiconv_std.dylib
0x0000000243161000 + 7336
5
libiconv_std.dylib
0x0000000243161000 + 6048
6
libiconv.2.dylib
___bsd_iconv + 76

7
lepMixedConv(char const*, char const*, char const*, unsigned long, char*, unsigned long*) (MCData.cpp:765)
8

charconv (charconv.c:173)
9

mailmime_encoded_phrase_parse (mailmime_decode.c:144)
10

mailcore::String::stringByDecodingMIMEHeaderValue(char const*) (MCString.cpp:1155)
11

mailcore::AbstractPart::importIMAPFields(mailimap_body_fields*, mailimap_body_ext_1part*) (MCAbstractPart.cpp:222)

mailcore::IMAPPart::importIMAPFields(mailimap_body_fields*, mailimap_body_ext_1part*) (MCIMAPPart.cpp:181)
13

mailcore::IMAPPart::attachmentWithIMAPBody1PartBasic(mailimap_body_type_basic*, mailimap_body_ext_1part*) (MCIMAPPart.cpp:207)
14
mailcore::IMAPPart::attachmentWithIMAPBody1Part(mailimap_body_type_1part*, mailcore::String*) (MCIMAPPart.cpp:121)
15
mailcore::IMAPPart::attachmentWithIMAPBodyMultipart(mailimap_body_type_mpart*, mailcore::String*) (MCIMAPPart.cpp:270)
16
mailcore::IMAPPart::attachmentWithIMAPBodyInternal(mailimap_body*, mailcore::String*) (MCIMAPPart.cpp:107)
17

mailcore::IMAPPart::attachmentWithIMAPBody(mailimap_body*) (MCIMAPPart.cpp:95)
18

msg_att_handler(mailimap_msg_att*, void*) (MCIMAPSession.cpp:2053)
19

mailimap_response_data_parse_progress (mailimap_parser.c:9100)
20

mailimap_cont_req_or_resp_data_parse_progress (mailimap_parser.c:8806)
21

mailimap_response_parse_progress (mailimap_parser.c:929)
22

mailimap_response_parse_with_context (mailimap_parser.c:8970)
23

mailimap_parse_response (mailimap.c:2395)
24

mailimap_fetch_qresync_vanished (qresync.c:402)

mailcore::IMAPSession::fetchMessages(mailcore::String*, mailcore::IMAPMessagesRequestKind, bool, mailimap_set*, mailcore::IndexSet*, mailcore::IndexSet*, unsigned long long, mailcore::HashMap*, mailcore::IMAPProgressCallback*, mailcore::Array*, mailcore::ErrorCode*) (MCIMAPSession.cpp:2373)
26
mailcore::IMAPSession::fetchMessagesByNumberWithExtraHeaders(mailcore::String*, mailcore::IMAPMessagesRequestKind, mailcore::IndexSet*, mailcore::IMAPProgressCallback*, mailcore::Array*, mailcore::ErrorCode*) (MCIMAPSession.cpp:2480)
27
mailcore::IMAPFetchMessagesOperation::main() (MCIMAPFetchMessagesOperation.cpp:114)
28
mailcore::OperationQueue::runOperations() (MCOperationQueue.cpp:123)
29
libsystem_pthread.dylib
__pthread_start + 136

Actual outcome
MailCore Cause app crash,How can we solve this problem?I need your help. Thank you!

[akkrat]

we also suffer from this issue on different domains: mail.ru, orange.fr, sapo.pt, hotmail ...
Our app crashes on iOS 17.1 and higher

[yedexiong]

we also suffer from this issue on different domains: mail.ru, orange.fr, sapo.pt, hotmail ...
Our app crashes on iOS 17.1 and higher

Did you solve it? How was it resolved?

[fanta1ty]

same issue for me

[akkrat]

we also suffer from this issue on different domains: mail.ru, orange.fr, sapo.pt, hotmail ...
Our app crashes on iOS 17.1 and higher

Did you solve it? How was it resolved?

Nope 🤷‍♀️

[suhastech]

Same here but on MacOS sonoma mostly

[StarsCF]

Any thoughts on how to fix this, guys?

[LKShadow]

same issue for me

[akkrat]

Seems like it is a Sonoma (14.1+)/iOS (17.1+) issue.
Here we can find some directions how to fix it rstudio/rstudio#13908. maybe rebuilding library with all its dependencies with latest compiler could fix the issue

[VyNguyen0102]

I've tested on iPad pro 11" iOS 17.1.1. without any issue.

[triton3]

Same issue on iOS 17.1.1 and macOS 14.1.1

@akkrat Just to clarify, are you suggesting that building with latest sdk and Xcode fixed this issue for you?

[ju135]

This seems to be related to iOS 17.1.1. (Happens when trying to decode a mime mail header with some specific encoding)
It's working on iOS 17.2 Beta which will probably be released to public around mid-December

[triton3]

@ju135 Appreciate the input. Do you know which encoding causes this issue?

[ju135]

Unfortunately, I'm not sure but I think I found the "bad mail" and this is probably the part of the header that caused the issue.

MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="b1_bcd83991a6fb4a8cb33a77395e4ee12d"
Content-Transfer-Encoding: 8bit
X-SES-Outgoing: 2023.11.12-54.240.6.31

This is a multi-part message in MIME format.

--b1_bcd83991a6fb4a8cb33a77395e4ee12d
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

� Geld sparen und schlau studieren: Unsere neuesten Studentenangebote �


--b1_bcd83991a6fb4a8cb33a77395e4ee12d

� is the ASCII representation of the thumbs-up emoji (👍) and is part of the mail subject which has 8-bit as Content-Transfer-Encoding and UTF-8 as charset. So the issue might be the binary-to-text conversion of special characters like emojis.

[dinhvh]

@ju135 could you show the full main headers of this email?

In this situation, I think we need to understand what parameters are passed here:

mailcore2/src/core/basetypes/MCData.cpp

Line 783 in 7417b2e

static int lepMixedConv(const char * tocode, const char * fromcode,

If you have a local repro, it would be easy to figure those out.
Then, we would be able to analyze and find a fix for it.