New subject: [Bug 58583] msvcp140: Multiple modern applications using C++ Concurrency crash in CONCRT140.dll on startup

10 Aug 2025

      http://bugs.winehq.org/show_bug.cgi?id=58583

            Bug ID: 58583
           Summary: msvcp140: Multiple modern applications using C++
                    Concurrency crash in CONCRT140.dll on startup
           Product: Wine
           Version: 10.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P2
         Component: msvcp
          Assignee: wine-bugs(a)winehq.org
          Reporter: waser(a)waser.tech
      Distribution: ---

Created attachment 79107
  --> http://bugs.winehq.org/attachment.cgi?id=79107
The game's own crash log from its `_appdata_ixray_/logs` directory.

This report details a consistent, immediate startup crash in `CONCRT140.dll`
affecting modern S.T.A.L.K.E.R. engine forks. These engines are based on the
open-source **Open X-Ray 1.6**, which itself works flawlessly under Wine.

The crash only appears in these newer, more advanced forks which leverage the
MSVC concurrency runtime for performance. This strongly indicates the issue
lies within Wine's implementation of these APIs, not a bug in the engines
themselves. This is effectively a regression, as the baseline engine works
while the newer, concurrency-enabled versions do not.

**Existing Related Bugs:**
This issue appears to be a new, highly reproducible test case for known
problems in Wine's concurrency support. We are filing this as a new report due
to the unique test case and the specific failure point (constructor vs.
destructor), but it is likely caused by the same underlying issues as:
- **Bug 52899:** Notes that `CONCRT140.dll` requires `CreateEventExW` from
`kernel32`. This is the most likely root cause.
- **Bug 41749:** Shows a crash in the destructor for
`Concurrency::details::_TaskCollection`. Our crash occurs in the *constructor*
of this same object, demonstrating a different failing code path.

Our report provides two clear methods to reproduce this crash, including one
that is fully free and requires no commercial software.

---

### **Primary Reproduction Steps (IX-Ray on S.T.A.L.K.E.R.: Call of Pripyat)**

*(Steps 1-5 as in previous draft)*

6.  **Run the Game with Debug Logging:** Launch the game using its main
executable with full debug channels enabled.
    ```bash
    WINEDEBUG=+all wine Stalker-COP.exe &> stalker_cop_crash_all.log
    WINEDEBUG=+seh,+loaddll wine Stalker-COP.exe &> stalker_cop_crash_seh.log
    ```
7.  **Result:** The process will crash immediately. The game's own crash log
(in `_appdata_ixray_/logs`) and the attached Wine debug logs will show a fatal
error in `CONCRT140.dll`.

---

### **Alternative Reproduction Steps (AOEngine on S.T.A.L.K.E.R. Anomaly)**

*(As in previous draft, but with the same logging commands)*

---

**Expected Behavior:**
The game launcher should appear, and the game should launch to the main menu
successfully, as it does on Windows and as the baseline Open X-Ray 1.6 engine
does under Wine.

**Logs:**
Three files will be attached for the primary reproduction case:
1.  `stalker_cop_crash_seh.log`: A small log with `+seh,+loaddll` for quick
initial review.
2.  `stalker_cop_crash_all.log.bz2`: The complete `+all` debug log, compressed
with bzip2 due to its large size.
3.  `ixray-2025.08.10-02.37.21-waser.log`: The game's own crash log from its
`_appdata_ixray_/logs` directory.

**References:**
- **IX-Ray GitHub (Open Source Engine):**
https://github.com/ixray-team/ixray-1.6-stcop
- **GE-Proton Issue #197 (Full History):**
https://github.com/GloriousEggroll/proton-ge-custom/issues/197

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[Bug 58583] New: msvcp140: Multiple modern applications using C++ Concurrency crash in CONCRT140.dll on startup

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