di( sometimes deletes {} blocks

[RedBeard0531]

Copying from compiler-explorer/compiler-explorer#1618

Describe the bug
di( is supposed to remove everything inside the innermost matching (), but sometimes (I don't know under what conditions) it deletes a {} block instead.

To Reproduce

 int  main() {
    int( 1 );
}

With the cursor on the 1, type di(. If you remove the space before the 1, this it does the right thing.