![](\"https:\/\/demensdeum.com\/art\/cant-fix-by-demens.png\")
<\/a><\/p>\nOne of the most common – and most annoying – reasons for this situation is looking for an error in completely the wrong place in the application.<\/strong><\/p>\n When we see an error, our attention is drawn to the place where it \u201cshot\u201d. But in complex systems, where a bug occurs (crash or incorrect value) is only the end of a long chain of events. When you try to fix the ending, you are fighting the symptoms, not the disease.<\/p>\n This is where the flowchart<\/strong> concept comes in.<\/p>\n Of course, it is not necessary to directly draw (draw) a flowchart on paper every time<\/strong>, but it is important to have it in your head or at hand as an architectural guide. A flowchart allows you to visualize the operation of an application as a tree of outcomes.<\/p>\n Without understanding this structure, the developer is often groping in the dark. Imagine the situation: you edit the logic in one condition branch, while the application (due to a certain set of parameters) goes to a completely different branch that you didn\u2019t even think about.<\/p>\n \nResult:<\/strong> You spend hours on a \u201cperfect\u201d code fix in one part of the algorithm, which, of course, does nothing to fix the problem in another part of the algorithm where it actually fails.\n<\/p><\/blockquote>\n To stop beating on a closed door, you need to change your approach to diagnosis:<\/p>\n Ideally, to fix it, you need to get the full state of the application<\/strong> at the time the bug was reproduced. Interaction logs are also critically important: they show not only the final point, but also the entire user path (what actions preceded the failure). This helps to understand how to recreate a similar state again.<\/p>\n Future tip: If you encounter a complex case, add extended debug logging information to this section of code in case the situation happens again.<\/em><\/p>\n In modern systems using LLM (Large Language Models)<\/strong>, classical determinism (\u201cone input, one output\u201d) is often violated. You can pass exactly the same input data, but get a different result.<\/p>\n This happens due to the non-determinism of modern production systems<\/strong>:<\/p>\n Under such conditions, it becomes almost impossible to reproduce \u201cthat same state\u201d. Only a statistical approach to testing can save you here.<\/p>\n If you are working with \u201cunsafe\u201d languages \u200b\u200b(C<\/strong> or C++<\/strong>), the bug may occur due to Memory Corruption<\/strong>.<\/p>\n These are the most severe cases: an error in one module can \u201coverwrite\u201d data in another. This leads to completely inexplicable and isolated failures that cannot be traced using normal application logic.<\/p>\n To avoid such \u201cmystical\u201d bugs, you should use modern approaches:<\/p>\n Fixing a bug is not about writing new code, but about understanding how the old one works. Remember: you could be wasting time editing a branch that management doesn’t even touch. Record the state of the system, take into account the factor of AI non-determinism and choose safe tools.<\/p>\n","protected":false},"excerpt":{"rendered":" You spend hours working on the code, going through hypotheses, adjusting the conditions, but the bug is still reproduced. Sound familiar? This state of frustration is often called “ghost hunting.” The program seems to live its own life, ignoring your corrections. One of the most common – and most annoying – reasons for this situationContinue reading “Why can’t I fix the bug?”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[61],"tags":[],"class_list":["post-4278","post","type-post","status-publish","format-standard","hentry","category-techie","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["en","ru","zh","de","fr","ja","pt","hi"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/posts\/4278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/comments?post=4278"}],"version-history":[{"count":2,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/posts\/4278\/revisions"}],"predecessor-version":[{"id":4281,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/posts\/4278\/revisions\/4281"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/media?parent=4278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/categories?post=4278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/wp-json\/wp\/v2\/tags?post=4278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}The trap of \u201cfalse symptoms\u201d<\/h2>\n
How it works in reality<\/h3>\n
\nAlgorithm for defeating a bug<\/h2>\n
\n
\u201cPhotograph\u201d of the moment of error<\/h3>\n
\nThe problem of \u201celusive\u201d states in the era of AI<\/h2>\n
\n
\nWhen logic fails: Memory problems<\/h2>\n
How to protect yourself at the architectural level?<\/h3>\n
\n
\n
Summary<\/h2>\n