Issues panel not working

In 2.5.2, this code:

int main()
{
test
return 0;
}

produces the expected "'test' was not declared in this scope' in the Issues panel.

However, in git 2.6, the same code produces only "Error 1" in the Issues panel. When I double click "Error 1", it says "File not found." In the Compile Output panel, the "'test' was not declared" appears. Everything else seems to be working fine (projects build and run as expected, etc).