wasm-opt: Assertion failed: it != indexes.memoryIndexes.end()

[jspanchu]

This is hard to reproduce and happens very rarely. wasm-opt fails with error

Assertion failed: it != indexes.memoryIndexes.end(), file
C:\b\s\w\ir\cache\builder\emscripten-releases\binaryen\src\wasm\wasm-binary.cpp, line 685

Version of emscripten/emsdk:

emcc --version
shared:INFO: (Emscripten: Running sanity checks)
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 4.0.3 (a9651ff57165f5710bb09a5fe52590fd6ddb72df)
Copyright (C) 2014 the Emscripten authors (see AUTHORS.txt)
This is free and open source software under the MIT license.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Build log: https://open.cdash.org/viewBuildError.php?buildid=10234437

Failing command line in full:

FAILED: Rendering/WebGPU/Testing/Cxx/vtkRenderingWebGPUCxxTests.js 
cmd.exe /C "cd . && C:\glr\builds\vtk\vtk-ci-ext\0\.gitlab\emsdk\upstream\emscripten\em++.bat -fexceptions -sDISABLE_EXCEPTION_CATCHING=0 -O3 -DNDEBUG -fexceptions -sDISABLE_EXCEPTION_CATCHING=0 -sEXCEPTION_STACK_TRACES=1    -sASYNCIFY=1 -sASYNCIFY_STACK_SIZE=81920 -sDISABLE_EXCEPTION_CATCHING=0 -fexceptions -sUSE_WEBGPU=0 --js-library=/.../.gitlab/dawn/lib/cmake/emdawnwebgpu/../../../lib/library_webgpu_enum_tables.js --js-library=/.../.gitlab/dawn/lib/cmake/emdawnwebgpu/../../../lib/library_webgpu_generated_struct_info.js --js-library=/.../.gitlab/dawn/lib/cmake/emdawnwebgpu/../../../lib/library_webgpu_generated_sig_info.js --js-library=/.../.gitlab/dawn/lib/cmake/emdawnwebgpu/../../../lib/library_webgpu.js --closure-args=--externs=/.../.gitlab/dawn/lib/cmake/emdawnwebgpu/../../../lib/webgpu-externs.js --js-library=/.../build/install/lib/vtkWebAssemblyRenderWindowInteractor.js --js-library=/.../build/install/lib/vtkEmscriptenTestUtilities.js -O1 --profiling-funcs -sEXIT_RUNTIME=1 -sALLOW_MEMORY_GROWTH=1 @CMakeFiles\vtkRenderingWebGPUCxxTests.rsp -o Rendering\WebGPU\Testing\Cxx\vtkRenderingWebGPUCxxTests.js  && cd ."
cache:INFO: generating system asset: symbol_lists/38eb0f003c1138bc1f3fdb504b7889591263f296.json... (this will be cached in "C:\glr\builds\vtk\vtk-ci-ext\0\.gitlab\emsdk\upstream\emscripten\cache\symbol_lists\38eb0f003c1138bc1f3fdb504b7889591263f296.json" for subsequent builds)
cache:INFO:  - ok
Assertion failed: it != indexes.memoryIndexes.end(), file C:\b\s\w\ir\cache\builder\emscripten-releases\binaryen\src\wasm\wasm-binary.cpp, line 685

em++: error: 'C:\glr\builds\vtk\vtk-ci-ext\0\.gitlab\emsdk\upstream\bin\wasm-opt --asyncify --pass-arg=asyncify-propagate-addlist [email protected]_*,env.__asyncjs__*,*.$asyncLoad,*.fd_sync,*.emscripten_promise_await,*.emscripten_async_load_script,*.emscripten_async_wget_data,*.emscripten_idb_load,*.emscripten_idb_store,*.emscripten_idb_delete,*.emscripten_idb_exists,*.emscripten_idb_clear,*.emscripten_idb_load_blob,*.emscripten_idb_store_blob,*.emscripten_sleep,*.emscripten_wget_data,*.emscripten_scan_registers,*.emscripten_lazy_load_code,*._load_secondary_module,*.emscripten_fiber_swap,*.SDL_Delay,*.emwgpuWaitAny Rendering\WebGPU\Testing\Cxx\vtkRenderingWebGPUCxxTests.wasm -o Rendering\WebGPU\Testing\Cxx\vtkRenderingWebGPUCxxTests.wasm -g --mvp-features --enable-bulk-memory --enable-bulk-memory-opt --enable-call-indirect-overlong --enable-multivalue --enable-mutable-globals --enable-nontrapping-float-to-int --enable-reference-types --enable-sign-ext' failed (returned 3221226505)

[kripken]

Very strange, I can't guess what could cause this. I think we will need a testcase to investigate it.