Compiler crashes when using generics syntax in type definition

When compiling the following code (tested on 0.18.1 windows amd64 (git 3402926) and on nim playground) the compilation fails without an error.
I don't know if the syntax is ok though.

# the following code will break compilation without any error or hint
# `exited with code=3221225725`
type A[I: SomeOrdinal, E] = tuple # same for object
  length: int
 
echo A.sizeof # works without the following proc
 
proc newA*[I: SomeOrdinal, E](): A[I, E] = # works without `SomeOrdinal`
  discard

Update: the problem is solved, if proc newA*[I: SomeOrdinal, E](): A[I, E] is replaced by proc newA*[I: SomeOrdinal, E](): A, so it has nothing to do with someOrdinal as thought before.

Update: The code works if type A[I: SomeOrdinal, E] = tuple is changed to type A[I, E] = tuple
so the crash comes from the type definition.
Thus it's maybe related to #8071

Update 2: code from original post still crashes on latest devel version.