[REG2.064] Issue 13221 - [ICE] '0' on line 318 in file 'interpret.c'

https://issues.dlang.org/show_bug.cgi?id=13221
With the issue case, `e->op` was `TOKerror` but its `type` was `int` - I think it should be fixed, but adding assert is too dangerous as a regression fix.