queue: post error message when pausing task
queue: post error message when pausing task

If downstream returns error and upstream has already delivered
everything (including EOS) and will no longer be around to find
out that we paused (and why), post error message.  Fixes #589991.

shelsonjava/gstreamer,lubosz/gstreamer,ylatuya/gstreamer,drothlis/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,krichter722/gstreamer,Lachann/gstreamer,mparis/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,collects/gstreamer,collects/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,magcius/gstreamer,drothlis/gstreamer,lubosz/gstreamer,ylatuya/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,mrchapp/gstreamer,cablelabs/gstreamer,ahmedammar/platform_external_gst_gstreamer,lovebug356/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,mrchapp/gstreamer,ylatuya/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,collects/gstreamer,Lachann/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,ensonic/gstreamer,lubosz/gstreamer,cfoch/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,justinjoy/gstreamer,collects/gstreamer,lubosz/gstreamer,mparis/gstreamer,magcius/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,cfoch/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,Distrotech/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,mrchapp/gstreamer,jpxiong/gstreamer,mrchapp/gstreamer,krichter722/gstreamer,justinjoy/gstreamer,drothlis/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,Distrotech/gstreamer,centricular/gstreamer,surround-io/gstreamer,mparis/gstreamer,ensonic/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpxiong/gstreamer,Lachann/gstreamer,drothlis/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,collects/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,ylatuya/gstreamer,surround-io/gstreamer,ensonic/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,lubosz/gstreamer,mparis/gstreamer,lovebug356/gstreamer,magcius/gstreamer,Lachann/gstreamer,centricular/gstreamer,magcius/gstreamer,justinjoy/gstreamer,mrchapp/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,mparis/gstreamer,magcius/gstreamer,Distrotech/gstreamer,Distrotech/gstreamer