4135 – Regression(1.034): ICE(statement.c): mixin in bad foreach, D1 only

On compiling the files in the below zip file (with unittesting), I get
dmd: statement.c:138: virtual int Statement::blockExit(): Assertion `0' failed.
There's a fair deal of code in there, but I believe its coming from TestRecords, for anyone bothering to whittle this one down.
http://personal.utulsa.edu/~ellery-newcomer/dxltest.zip 

I don't think it's fair for Walter or Don to debug your code. So I suggest you to first of all merge all that code in a single module, then start removing parts and keep that ICE, until you reach to a short enough program to post here again.

I think it's fair for Walter or Don to debug their code.
Anyways, I lied about TestRecords.
This is as small as I care to get it:
public int blitvisit()() {
 foreach(k; s.tupleof){
 mixin(BlitX!());
 }
}
void main(){
 blitvisit!()();
}

If you post several modules here then you are asking people to debug your code.
Your last code doesn't show the ICE, it just shows:
test.d(2): Error: undefined identifier s

This is D1-only. Reduced test case:
void bug4125() {
 foreach(k; s){
 mixin("");
 }
}
--------
test0.d(384): Error: undefined identifier s
test0.d(384): Error: cannot infer type for k
Statement::blockExit(00C17914)
mixin("");
Passed in 1.030, ICE in 1.034.

https://github.com/D-Programming-Language/dmd/commit/017697af3ff93383dad0ad085994e3f2aab515d8 

The fix was:
https://github.com/D-Programming-Language/dmd/pull/570