[BUG] Crash report

[why-him]

Description

2026-06-17T17:19:55.515 [INFO]
WinMerge Crash Information

Timestamp: 2026-06-12 07:29:39
Process ID: 6616
Thread ID: 9028
Exception Code: 0xC0000005 (Access Violation)
Exception Addr: 0x00007FF65860DC54
Module Name: WinMergeU.exe
Module Base: 0x00007FF658480000
Offset: 0x0018DC54
Stack Info:

SymInit: Symbol-SearchPath: '.;C:\Program Files\WinMerge;C:\Program Files\WinMerge;C:\windows;C:\windows\system32;SRV*C:\websymbols*https://msdl.microsoft.com/download/symbols;', symOptions: 530, UserName: 'yosh'
OS-Version: 10.0.26100 () 0x100-0x1
* Crash info: C:\Users\yosh\AppData\Roaming\WinMerge\CrashInfo\WinMergeCrashInfo-20260617171942.txt
* Crash dump: not found
* Config log: C:\Users\yosh\AppData\Roaming\WinMerge\CrashInfo\WinMergeConfig-20260617171942.txt
2026-06-17T17:19:55.516 [ERROR] WinMerge detected a previous crash. Please report this if possible.
2026-06-17T17:21:22.838 [INFO] About WinMerge: OK


### Steps to reproduce

N/A

### WinMerge version

2.16.56.2 (2026.05)  X64

### Platform

Windows ARM64

### Additional information

Just following orders...

[sdottaka]

Thank you for the report.

We have identified the location where the crash occurs, but have not been able to reproduce it yet.

Could you let us know:

• Were you performing a folder comparison when the crash occurred?
• If so, did the crash happen at the start of the comparison, or partway through?
• Does this happen consistently, or only occasionally?

0:000> ln winmergeu.exe+0x0018DC54
Browse module
Set bu breakpoint

 [D:\dev\winmerge-stable\BuildTmp\Src\Src\DirScan.cpp @ 107] (00000001`4018da80)   WinMergeU!DiffWorker::run+0x1d4   |  (00000001`4018dd70)   WinMergeU!DiffWorker::`scalar deleting destructor'



DirView.cpp 107:				m_pCtxt->m_pCompareStats->BeginCompare(&pWorkNf->data(), m_id);

[why-him]

Below...

On Thu, Jun 18, 2026 at 1:45 AM Takashi Sawanaka ***@***.***> wrote: *sdottaka* left a comment (WinMerge/winmerge#3416) <#3416 (comment)> Thank you for the report. We have identified the location where the crash occurs, but have not been able to reproduce it yet. Could you let us know: - Were you performing a folder comparison when the crash occurred? Yes. Actually two in parallel. I knew they'd take a long time & I set it

up to run while I was out of town. When I got back, it wasn't running. When I ran it again, i got the message about the crash and the request to report it. BTW, it would help if that message also had a link to where the report should be made so users don't have to hunt it down.

- If so, did the crash happen at the start of the comparison, or partway through? Partway through or perhaps after completion. - Does this happen consistently, or only occasionally?

First time for me. Hasn't happened since, but I only did a simple comparison since I got back.

…

0:000> ln winmergeu.exe+0x0018DC54 Browse module Set bu breakpoint [D:\dev\winmerge-stable\BuildTmp\Src\Src\DirScan.cpp @ 107] (00000001`4018da80) WinMergeU!DiffWorker::run+0x1d4 | (00000001`4018dd70) WinMergeU!DiffWorker::`scalar deleting destructor' DirView.cpp 107: m_pCtxt->m_pCompareStats->BeginCompare(&pWorkNf->data(), m_id); — Reply to this email directly, view it on GitHub <#3416?email_source=notifications&email_token=AGHB62Y22QUGBVX7JS2DOEL5AMNSDA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZTGYYTQMBTHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4736180395>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGHB623N5OQUQHK2IUQN7AT5AMNSDAVCNFSNUABEKJSXA33TNF2G64TZHMZDMNBZGQYDCOB3JFZXG5LFHM2DMOBUGI4TCMJRG2QXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AGHB62YWWIVQ3KG5KPUQKK35AMNSDA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZTGYYTQMBTHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/AGHB626IEFQQIMQQW6G4RHL5AMNSDA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINZTGYYTQMBTHE22M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>

[sdottaka]

Thanks for the information. So, you were running two folder comparisons in parallel within the same WinMerge instance. While we haven't been able to reproduce the crash yet, this is a very helpful hint. Please let us know if you discover any specific conditions that trigger it.