Segmentation fault llvm-16 (caused by insert_basic_block_after?)

[0xFE4415]

versions:
OS: Fedora Linux 39 x86_64
LLVM:
llvm16.x86_64 16.0.6-5.fc39 @fedora
llvm16-devel.x86_64 16.0.6-5.fc39 @fedora
llvm16-libs.x86_64 16.0.6-5.fc39 @fedora
llvm16-static.x86_64 16.0.6-5.fc39 @fedora

repro.zip

reproduction:

$ unzip repro.zip
$ cd repro
$ cargo b
$ opt-16 --load-pass-plugin=./target/debug/librepro.so  --passes='my_pass' file.ll -S -o file_out.ll

expected behavior:

file_out.ll is created

actual behavior:

segmentation fault (core dumped)

output.txt