Assertion failed: It != MQueues.end() && "Queue not found in device's queue list"

[againull]

Describe the bug

2026-06-25T17:45:52.9487309Z Assertion failed: It != MQueues.end() && "Queue not found in device's queue list", file D:\github\_work\llvm\llvm\src\sycl\source\detail/device_impl.hpp, line 2316
2026-06-25T17:45:52.9487420Z Exception Code: 0x80000003
2026-06-25T17:45:52.9488043Z  #0 0x00007ff7079e5875 HandleAbort (D:\github\_work\llvm\llvm\build\tools\sycl\unittests\Extensions\FreeFunctionCommands\Preview\FreeFunctionCommandsTests-Preview_Tests.exe+0x295875)

Visible in two unrelated PRs:
https://github.com/intel/llvm/actions/runs/28188644728/job/83497339152
https://github.com/intel/llvm/actions/runs/28199741854/job/83544615114?pr=22390

To reproduce

1. Include a code snippet that is as short as possible
2. Specify the command which should be used to compile the program
3. Specify the command which should be used to launch the program
4. Indicate what is wrong and what was expected

Environment

• OS: [e.g Windows/Linux]
• Target device and vendor: [e.g. Intel GPU]
• DPC++ version: [e.g. commit hash or output of clang++ --version]
• Dependencies version: [e.g. the output of sycl-ls --verbose]

Additional context

No response

[againull]

@uditagarwal97 I haven't verified, but there is a chance that this is either caused by one of these commits b8a7983 ("Unregister sycl::queue upon destruction", #22314) and 90ebc65 ("Use std::vector instead of set...", #22323) or those commits exposed existing issue.

[uditagarwal97]

@uditagarwal97 I haven't verified, but there is a chance that this is either caused by one of these commits b8a7983 ("Unregister sycl::queue upon destruction", #22314) and 90ebc65 ("Use std::vector instead of set...", #22323) or those commits exposed existing issue.

Thanks, Artur. Let me check this out.