INTERNAL_ERROR    649 contrib/libtests/pngimage.c          case INTERNAL_ERROR: /* anything unexpected is an internal error: */
INTERNAL_ERROR    755 contrib/libtests/pngimage.c             display_log(dp, INTERNAL_ERROR, "damaged buffer list");
INTERNAL_ERROR    909 contrib/libtests/pngimage.c          display_log(dp, INTERNAL_ERROR, "bad transform table");
INTERNAL_ERROR   1024 contrib/libtests/pngimage.c             display_log(dp, INTERNAL_ERROR,
INTERNAL_ERROR   1084 contrib/libtests/pngimage.c             display_log(dp, INTERNAL_ERROR, "invalid bpp %u for bit_depth %u",
INTERNAL_ERROR   1143 contrib/libtests/pngimage.c                display_log(dp, INTERNAL_ERROR, "mask calculation error %u, %u",
INTERNAL_ERROR   1484 contrib/libtests/pngimage.c       display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret);
INTERNAL_ERROR   1254 contrib/tools/pngfix.c       file->status_code |= INTERNAL_ERROR;
INTERNAL_ERROR   3590 contrib/tools/pngfix.c       control->file.status_code |= INTERNAL_ERROR;