Your message dated Fri, 6 Feb 2026 14:24:52 -0500
with message-id 
<caaajcmzeurnzuo0tnwoqma_-gww_fmu5a+s-n3mgsndfvdw...@mail.gmail.com>
and subject line Re: io-jasper invalid operation
has caused the Debian Bug report #774712,
regarding io-jasper invalid operation
to be marked as done.

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-- 
774712: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=774712
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: gdk-pixbuf
Version: 2.31.1-2
Tags: upstream patch

The following code in io-jasper.c looks suspicious:

[...]
  if (jas_stream_write (context->stream, buf, size) < 0) {
    g_set_error_literal (error, GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
[...]

here size is usually a small size (4096...). However in jasper we have:

[...]
/* Write characters from a buffer to a stream. */
int jas_stream_write(jas_stream_t *stream, const void *buf, int cnt);
[...]

Where implementation is:

int jas_stream_write(jas_stream_t *stream, const void *buf, int cnt)
{
  int n;
  const char *bufptr;

  bufptr = buf;

  n = 0;
  while (n < cnt) {
    if (jas_stream_putc(stream, *bufptr) == EOF) {
      return n;
    }
    ++bufptr;
    ++n;
  }

  return n;
}

therefore the return value can never be below zero. I suggest changing
the code to:

  if (jas_stream_write (context->stream, buf, size) != size ) {

--- End Message ---
--- Begin Message ---
gdk-pixbuf hasn't used jasper in Debian for a decade so I'm closing this bug.

Thank you,
Jeremy BĂ­cha

--- End Message ---

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