firtool: ../lib/Dialect/FIRRTL/Transforms/LowerTypes.cpp:500: mlir::Value {anonymous}::FIRRTLTypesLowering::getBundleLowering(mlir::Value, llvm::StringRef): Assertion `entry && "bundle lowering was not set"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
Stack dump:
0.      Program arguments: firtool -format=mlir -lower-to-rtl -enable-lower-types -verilog
1.      2.      Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
firtool(+0xf059a)[0x562a91a2159a]
firtool(+0xf0655)[0x562a91a21655]
firtool(+0xee2df)[0x562a91a1f2df]
firtool(+0xefef1)[0x562a91a20ef1]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14bb0)[0x7f7142bd8bb0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f71426d08cb]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x116)[0x7f71426b5864]
/lib/x86_64-linux-gnu/libc.so.6(+0x26749)[0x7f71426b5749]
/lib/x86_64-linux-gnu/libc.so.6(+0x38a96)[0x7f71426c7a96]
firtool(+0x1ff279)[0x562a91b30279]
firtool(+0x1fe93c)[0x562a91b2f93c]
firtool(+0x2005cd)[0x562a91b315cd]
firtool(+0x20042c)[0x562a91b3142c]
firtool(+0x20008b)[0x562a91b3108b]
firtool(+0x1ffd79)[0x562a91b30d79]
firtool(+0x1ffa85)[0x562a91b30a85]
firtool(+0x1ff74d)[0x562a91b3074d]
firtool(+0x1fd04b)[0x562a91b2e04b]
firtool(+0x660b27)[0x562a91f91b27]
firtool(+0x660d97)[0x562a91f91d97]
firtool(+0x661bc9)[0x562a91f92bc9]
firtool(+0x665362)[0x562a91f96362]
firtool(+0x66514d)[0x562a91f9614d]
firtool(+0x6682ea)[0x562a91f992ea]
firtool(+0x667750)[0x562a91f98750]
firtool(+0x66691b)[0x562a91f9791b]
firtool(+0x48fb24)[0x562a91dc0b24]
firtool(+0x803d87)[0x562a92134d87]
firtool(+0x665278)[0x562a91f96278]
firtool(+0x66468c)[0x562a91f9568c]
firtool(+0x66210a)[0x562a91f9310a]
firtool(+0x661593)[0x562a91f92593]
firtool(+0x660b08)[0x562a91f91b08]
firtool(+0x660d97)[0x562a91f91d97]
firtool(+0x661bc9)[0x562a91f92bc9]
firtool(+0x665362)[0x562a91f96362]
firtool(+0x6652df)[0x562a91f962df]
firtool(+0x66468c)[0x562a91f9568c]
firtool(+0x66210a)[0x562a91f9310a]
firtool(+0x661593)[0x562a91f92593]
firtool(+0x660b08)[0x562a91f91b08]
firtool(+0x660d97)[0x562a91f91d97]
firtool(+0x6630f7)[0x562a91f940f7]
firtool(+0x206d5)[0x562a919516d5]
firtool(+0x20c02)[0x562a91951c02]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf2)[0x7f71426b7cb2]
firtool(+0x2012e)[0x562a9195112e]
Aborted (core dumped)