module body Example.CodegenBug is
    function double(x: Int64): Int64 is
        return x * 2;
    end;

    function consume(x: Int64): Unit is
        printLn(x);
        return nil;
    end;

    function main(): ExitCode is
        let f: Fn[Int64, Int64] := double;
        -- Bug: calling a function pointer as an argument to another function
        -- generates a spurious semicolon in the C output.
        consume(f(10));
        return ExitSuccess();
    end;
end module body.

Compiler call tree printed to calltree.html
Error:
  Title: Command Line Arguments Error
  Module:
    [unknown]
  Location:
    [no span available]
  Description:
    Failed to run C compiler.
    
    Command: `cc /tmp/austral_fa8934.c -fwrapv -lm -o main`
    
    Exit code: 1
    
    Standard output:
    
    
    Standard error:
    /tmp/austral_fa8934.c: In function 'decl_281':
    /tmp/austral_fa8934.c:4819:79: error: expected ')' before ';' token
     4819 |     decl_283(((au_int64_t) ((au_int64_t(*)(au_int64_t))(f))(((au_int64_t) 10));));
          |              ~                                                                ^
          |                                                                               )
  Code:
    [no span available]