http://dev.clojure.org/jira This file is an XML representation of an issue en-us 4.4 649 25-07-2011 http://dev.clojure.org/jira/browse/CLJ-1142 Clojure <p>The unary call for clojure.core// treats a dividend of 0.0 differently than the binary call, likely due to inlining.</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">(/ 0.0) ;; java.lang.ArithmeticException: Divide by zero (/ 1 0.0) ;;= Infinity (/ 1 (identity 0.0)) ;; java.lang.ArithmeticException: Divide by zero</pre> </div></div> CLJ-1142

Incorrect divide-by-zero error with floating point numbers

Defect Major Open Unresolved Unassigned Tim McCormack Tue, 8 Jan 2013 16:00:00 -0600 Tue, 8 Jan 2013 23:22:50 -0600 Release 1.4 0 1 <p>The relevant code seems to be this in clojure.lang.Numbers/divide:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"><span class="code-keyword">if</span>(yops.isZero((<span class="code-object">Number</span>)y)) <span class="code-keyword">throw</span> <span class="code-keyword">new</span> ArithmeticException(<span class="code-quote">"Divide by zero"</span>);</pre> </div></div> <p>Making Numbers/divide be more restrictive than double arithmetic seems like a bug; explicitly throwing an ArithmeticException instead of letting the JVM figure it just seems like more work than necessary.</p> Global Rank