<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi all,<div class=""><br class=""></div><div class="">Recently I’ve made a silly mistake. I wrote:</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class="">case Payload of</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class=""> <<_:4/binary-unit:8, _:<b class=""><font color="#e32400" class="">255</font></b>, _:7/binary-unit:8, 0:16>> -> Payload;</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class=""> _ -> throw( drop )</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class="">end</font></div></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class=""><br class=""></font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Instead of:</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><div class=""><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class="">case Payload of</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class=""> <<_:4/binary-unit:8, <b class=""><font color="#38571a" class="">255:8</font></b>, _:7/binary-unit:8, 0:16>> -> Payload;</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class=""> _ -> throw( drop )</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><font face="Courier New" class="">end</font></div></div><div class=""><font face="Courier New" class=""><br class=""></font></div><div class=""><font face="Courier New" class=""><br class=""></font></div><div class="">Considering that overall pattern (which erroneously references 255 bits long field, instead of an octet with a value of 255 ) is not aligned to 8-bit boundary, is it unreasonable to expect the compiler to report this as a potential problem, or at least generate a warning (support for bit-fields notwithstanding).</div><div class=""><br class=""></div><div class="">What am I missing here?</div><div class=""><br class=""></div><div class="">V/</div><div class=""><br class=""></div></div></body></html>