"Void function should not return a value" build failure(s) — clang 6.0

A void function should not have a returned value.
void foo() {
	return 1;
}
PackageVersionSupposed error messageFull log Bug report
aces3 3.0.8-5.1asv_ctl.c:1722:1: error: void function 'str2d_' should not return a value [-Wreturn-type] Log
espeak-ng 1.49.2+dfsg-1src/libespeak-ng/speech.c:111:3: error: void function 'open_audio' should not return a value [-Wreturn-type] Log
fairymax 5.0b-1fairymax.c:477:21: error: void function 'PrintVariants' should not return a value [-Wreturn-type] Log 743008
fso-audiod 0.12.0-3alsaloop.c:87:2: error: void function 'my_exit' should not return a value [-Wreturn-type] Log
gdis 0.90-5grid.c:61:1: error: void function 'grid_application_set' should not return a value [-Wreturn-type] Log 728454
montage 5.0+dfsg-1initdistdata.c:36:6: error: void function 'closefitsfile' should not return a value [-Wreturn-type] Log
pcb-rnd 1.2.8-2obj_pinvia.c:1096:3: error: void function 'draw_pin_name' should not return a value [-Wreturn-type] Log
pylibtiff 0.4.1+20160502-1libtiff/src/bittools.c:191:7: error: void function 'initbittools' should not return a value [-Wreturn-type] Log
unicon 3.0.4+dfsg1-1tab2dat.c:33:7: error: void function 'load_phr' should not return a value [-Wreturn-type] Log 739924

9 errors