OSC52 no longer works after invalid base64 string

[scturtle]

Describe the bug
OSC52 no longer works after invalid base64 string.

To Reproduce

#include <stdio.h>
#include <stdlib.h>
int main() {
    FILE *tty = fopen("/dev/tty", "w");
    const char *hello = "\e]52;c;aGVsbG8=\a";
    fputs(hello, tty); fflush(tty);
    const char *invalid = "\e]52;c;!\a"; // invalid
    fputs(invalid, tty); fflush(tty);
    const char *world = "\e]52;c;d29ybGQ=\a";
    fputs(world, tty); fflush(tty);
}

After running the above code, clipboard is world in kitty 0.35.2 but hello in kitty 0.36.0(and nightly).

Screenshots

0.36.0:

0.35.2:

Environment details

MacOS 14.6.1

Additional context

This happens because of emacs package clipetty's following hack (using an invalid base64 string to reset the clipboard).

So it may not be kitty's fault but it may be an regression.

https://github.com/spudlyo/clipetty/blob/01b39044b9b65fa4ea7d3166f8b1ffab6f740362/clipetty.el#L158-L163