wasm-opt hangs on Windows

[Photosounder]

I obtained binaryen on MSYS2 on Windows 10 using the command pacman -S mingw-w64-ucrt-x86_64-binaryen, which gives me "wasm-opt version 121". wasm-opt always hangs after writing an output file (the output file appears to be complete) and not even Ctrl-C can kill it (only the Task Manager can or closing the parent process), but returns properly when doing a simple wasm-opt --help, so I think this has something to do with closing the stream, although the file handle must be closed by the time it starts to hang because I can delete the file even though the program hangs.

Here's an example, the contents of the input file don't seem to influence the outcome:

$wasm-opt demo_nolibc.wasm -O0 -o opt-test.wasm -d
reading...
reading binary from demo_nolibc.wasm
Loading 'demo_nolibc.wasm'...
warning: no passes specified, not doing any work
writing...
writing binary to opt-test.wasm
Opening 'opt-test.wasm'

It hangs the same regardless of whether I run this from msys2's bash.exe or from cmd.exe.

[kripken]

Do you see this with the official builds of wasm-opt? If not, it might be a pacman build issue.

Official builds: https://github.com/WebAssembly/binaryen/releases/tag/version_121

[Photosounder]

You're right, it must be a pacman issue, it doesn't hang with the official build.