From: max.zab87@... Date: 2018-11-16T17:43:15+00:00 Subject: [ruby-core:89839] [Ruby trunk Bug#15312] Ruby gives me wrong result for plus operation Issue #15312 has been reported by kot-begemot (Max Zet). ---------------------------------------- Bug #15312: Ruby gives me wrong result for plus operation https://bugs.ruby-lang.org/issues/15312 * Author: kot-begemot (Max Zet) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: * Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN ---------------------------------------- Run into this weird issue today. Tried that on rubies 2.5.1p57 and ruby 2.5.3p105 (i believe this is latest stable at the moment). Here is how to reproduce it $ irb 2.5.3 :001 > 2.6 + 0.1 => 2.7 2.5.3 :002 > 2.7 + 0.1 => 2.8000000000000003 2.5.3 :003 > 2.8 + 0.1 => 2.9 Here some more cases $ irb 2.5.3 :001 > 2.7 + 0.01 => 2.71 2.5.3 :002 > 2.79 + 0.01 => 2.8 2.5.3 :003 > 2.8 - 0.1 => 2.6999999999999997 2.5.3 :004 > 2.79 + 0.01 => 2.8 2.5.3 :005 > 2.81 - 0.01 => 2.8000000000000003 Haven't discovered other cases yet, if will catch them, will post them here -- https://bugs.ruby-lang.org/ Unsubscribe: