GoogleTest: EXPECT_THROW catches different type?

I'm trying to test EXPECT_THROW, like below.

#include <gtest/gtest.h>
int Foo(int a, int b){
    if (a == 0 || b == 0){
        throw "don't do that";
    }
    int c = a % b;
    if (c == 0)
        return b;
    return Foo(b, c);
}
TEST(FooTest, Throw2){
    EXPECT_THROW(Foo(0,0), char*);
}
int main(int argc, char* argv[]){
    testing::InitGoogleTest(&argc,argv);
    return RUN_ALL_TESTS();
}

I expect that the 'Throw2' should succeed. But it gives this error information:

Expected: Foo(0,0) throws an exception of type char*.
Actual: it throws a different type.

So what is type being thrown here?