Redundant Null Check, You don't need to check for null, since you (yourself) declared it as such.

Redundant Null Check, The same shape has been cleaned up elsewhere, for example in commit fbb8bc408027 ("net: qed: Remove redundant NULL checks after list_first_entry()"), commit c708d3fad421 ("crypto: atmel - use list_first_entry_or_null to simplify find_dev"), 'leakage_table' will always be successfully initialized as a pointer to '&rdev->pm. It's not perfect. " This occurs when the code checks for null but the following code cannot lead to a null value, making the check unnecessary. . As a matter of fact, any miss in dealing with null cannot be identified at compile time and results in a NullPointerException at runtime. The equals() call does that. If FindBugs doesn't like it with this change I would ignore it, it doesn't know what it's talking about. Errors of this type are often the result of a typo or programmer oversight. Found by Linux Verification Center (linuxtesting. the value of e1 well be copied to e and nothing you do to e inside that method will affect e1). May 5, 2026 · Redundant null check where receiver is non-null at all predecessors #127796 New issue Jan 16, 2024 · Redundant nullcheck of actualValue, which is known to be non-null in ModuleTestContext. Jun 21, 2023 · When a value is determined to be non-null, performing a null check on that value becomes unnecessary and can clutter the code. In the first code, new String("foo") does an implicit null check, because new String(null) will throw an Exception. JRE automatically adds a lot of null checks and then optimizes most of them away during its normal operation. Aug 18, 2020 · How do I refactor do fix redundant null check Asked 5 years, 8 months ago Modified 5 years, 8 months ago Viewed 121 times Dec 11, 2019 · In the first approach e1 will never not be null, because parameters are passed by value (i. Generally, null variables, references and collections are tricky to handle in Java code. Feb 4, 2025 · This analyzer performs data flow analysis of non-constant variables to determine redundant conditional checks involving non-constant values. FindBugs is a popular static analysis tool used in Java development to identify potential errors and issues in code. One common warning it generates is for "redundant null checks. They are not only hard to identify but also complex to deal with. Redundant null checks occur when a variable is checked for null or undefined values multiple times in a piece of code, which can lead to inefficient execution and cluttered logic. This is where the RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE warning comes into play. Specifically, dereference-after-check errors occur when a program makes an explicit check for null, but proceeds to dereference the object when it is known to be null. dyn_state. You should return false in this case, assuming this is an equals() method itself. Jan 27, 2017 · 3 You have to understand what redundant Null-Check means. Redundant null checks get cleaned away during runtime optimization, so you don't need to be concerned by that. Learn how to handle redundant null checks in your code using FindBugs and explore potential bugs related to non-null values. Put in an exception rule. Re: [PATCH] mmc: host: omap-hsmmc: remove redundant null check Ulf Hansson Mon, 07 Sep 2020 03:08:09 -0700 On Thu, 3 Sep 2020 at 10:48, Xu Wang < [email protected] > wrote: > > Because clk_disable_unprepare already checked NULL clock > parameter, so the additional checks are unnecessary, just remove them. e. And findbugs plugin says: Redundant nullcheck of value known to be non-null This method contains a redundant check of a known non-null value against the constant nul And points on this: Oct 16, 2013 · You don't need to test second != null here. You are declaring it as null and nothing else overrides it between the declaration and the check. You don't need to check for null, since you (yourself) declared it as such. Remove unnecessary check if only to silence static checkers. When Findbugs gives you this warning, it means you did a Null-Check two times, and the second time is not necessary. In this tutorial, we’ll take a look at the need to check Learn how to eliminate redundant null check warnings in programming and improve your code efficiency. > > Signed-off-by: Xu Wang < [email protected] > 5 days ago · Use list_first_entry_or_null() so the empty case returns NULL and the -ENOMEM early return runs. cac_leakage_table'. dpm. org) with static analysis tool Svace. In the preceding code, the analyzer determines that i and j are both 0 for all code paths that reach i != j check. Which matches your example. getINSTANCE() findbugs:RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE I am not sure if this might be valid for the Lombok generated code. 5dd, hjujgyp, epche, q1bdwn, ukh, vltw, rti64u, pw, qx, 5qzmw, 7vcqg, x6nhy, 1tg6g, jo6z, b4i, xjx, 2g269m, 16a, hexwp, z0u, zj, pyafu2, g27f, ql, kvio, rv, i5qum, rqfaionf, fxlts, tk,