gcc/testsuite/gdc.test/fail_compilation/ice8309.d

/*
TEST_OUTPUT:
---
fail_compilation/ice8309.d(10): Error: incompatible types for ((__lambda1) : (__lambda2)): 'double function() pure nothrow @nogc @safe' and 'int function() pure nothrow @nogc @safe'
---
*/

void main()
{
    auto x = [()=>1.0, ()=>1];
}