The situation is like this.(dmd 2.058)
====================

libtest.d
--------------------
template typestring( T ) {
	string typestring = T.stringof;

	static this() {
		assert(0);
	}
}
alias typestring!int ti;
--------------------
>dmd -lib -H libtest.d


test.d
--------------------
import std.stdio;
import libtest;         // <- libtest.di is imported.
pragma( lib, "libtest.lib" );

alias typestring!uint tui;
//mixin typestring!uint tui; // it is no matter, alias or mixin.

void main() {
	//writeln( ti); // <- uncomment to Assertion failure
	writeln( tui ); // <- with no Assertion failure, "uint" is printed.
}
--------------------
>dmd test.d
>./test.exe
>uint

====================
When libtest.d is imported, or when I write the body code of the static this() to libtest.di, assertion failure occur.