commit 6367924ac62e72fc97e3105c43eb6bd1ec8eead3
author DRC <information@libjpeg-turbo.org> Tue Dec 31 00:32:30 2019 -0600
committer DRC <information@libjpeg-turbo.org> Tue Dec 31 00:35:08 2019 -0600
tree 9acfb28c0e0d6a2a1f64d88223b609a7882bf81b
parent 29f718ee63f4aaeae310102f697bc23cae84bbb1

tjTransform(): Use instance err. for bad crop spec

Addresses a concern raised in #396

turbojpeg.c

diff --git a/turbojpeg.c b/turbojpeg.c
index fc471e9..7f607d1 100644
--- a/turbojpeg.c
+++ b/turbojpeg.c
@@ -1906,10 +1906,11 @@
     if (xinfo[i].crop) {
       if ((t[i].r.x % xinfo[i].iMCU_sample_width) != 0 ||
           (t[i].r.y % xinfo[i].iMCU_sample_height) != 0) {
-        snprintf(errStr, JMSG_LENGTH_MAX,
+        snprintf(this->errStr, JMSG_LENGTH_MAX,
                  "To crop this JPEG image, x must be a multiple of %d\n"
                  "and y must be a multiple of %d.\n",
                  xinfo[i].iMCU_sample_width, xinfo[i].iMCU_sample_height);
+        this->isInstanceError = TRUE;
         retval = -1;  goto bailout;
       }
     }