Compiler crashes for some malformed existential data type

With the latest greatest nightly iTasks compiler when running:

clm -IL iTasks -IL Platform -IL TCPIP -IL ABCInterpreter -IL GraphCopy -IL Dynamics -dynamics test

The following error occurs and the compiler crashes

 Error [test.icl,6,SDSNoNotify]: sds type variable already defined
readPtr: Not a pointer of this heapclm: reading compiler result failed: No such file or directory

module test

import iTasks

:: SDSNoNotify sds p r w = E.sds: SDSNoNotify (sds p r w) & RWShared sds

Start = 42

It is obvious that this is an erroneous program but it shouldn't lead to a compiler crash.

The even simpler program:

module test
:: T a = E.a: T a
Start = 42

crashes with a similar error:

Error [test.icl,3,T]: a type variable already defined
readPtr: Not a pointer of this heapclm: reading compiler result failed: No such file or directory