Error Prone 2.30.0

New checks:

• AutoValueBoxedValues: Detects unnecessary boxing in AutoValue classes.
• DefaultLocale: Detects implicit use of the JVM default locale, which can result in differing behaviour between JVM executions.
• UnnecessaryBreakInSwitch: Remove unnecessary break statements in -> switches.

Closed issues: #632, #4487

Full changelog: v2.29.2...v2.30.0

Error Prone 2.29.2

This release contains all of the changes in 2.29.0 and 2.29.1, plus:

• a bug fix for a crash in TraditionalSwitchExpression (#4479)
• restores the module-info for the annotations jar, which was accidentally removed (#4480)

Full Changelog: v2.29.1...v2.29.2

Error Prone 2.29.1

This release contains all of the changes in 2.29.0, plus:

• a bug fix to UnusedVariable to handle unnamed _ variables (#4451)
• a bug fix for a crash in SetUnrecognized (#4475)

Full Changelog: v2.29.0...v2.29.1

Error Prone 2.29.0

New checks:

• MissingRuntimeRetention
• SetUnrecognized
• StatementSwitchToExpressionSwitch

Closed issues: #4318, #4429, #4467

Full Changelog: v2.28.0...v2.29.0

Error Prone 2.28.0

Error Prone nows supports the latest JDK 23 EA builds (#4412, #4415).

Closed issues:

• Improved errors for invalid check severities (#4306).
• Fix a crash with nested instanceof patterns (#4349).
• Fix a crash in JUnitIncompatibleType (#4377).
• In ObjectEqualsForPrimitives, don't suggest replacing equal with == for floating-point values (#4392).

New checks:

• DeeplyNested discourages very deeply nested code that can cause StackOverflowErrors during compilation.
• GuiceNestedCombine discourages nesting of Modules.combine(), which is unnecessary.
• PatternMatchingInstanceof migrates code to use pattern matching for instanceof
• SunApi discourages use of internal proprietary JDK APIs which may be removed from future releases.

Full Changelog: v2.27.1...v2.28.0

Error Prone 2.27.1

This release contains all of the changes in 2.27.0, plus a bug fix to ClassInitializationDeadlock (#4378)

Full Changelog: v2.27.0...v2.27.1

Error Prone 2.27.0

New checks:

• ClassInitializationDeadlock detects class initializers that reference subtypes of the current class, which can result in deadlocks.
• MockitoDoSetup suggests using when/thenReturn over doReturn/when for additional type safety.
• VoidUsed suggests using a literal null instead of referring to a Void-typed variable.

Modified checks:

• TruthSelfEquals has been renamed and generalized as SelfAssertion
• RedundantSetterCall has been improved, and enabled as an error oby default

Closed issues: #4291. #4308, #4343, #4320

Full Changelog: v2.26.1...v2.27.0

Error Prone 2.26.1

This release contains all of the changes in 2.26.0, plus a bug fix to the module name of the annotations artifact com.google.errorprone.annotations (9d99ee7)

Starting in 2.26.x, the 'annotations' artifact now includes a module-info.java for Java Platform Module System support, thanks to @sgammon in #4311.

---

Compatibility note:

Now that the annotations artifact explicit declares a module instead of relying on Automatic-Module-Name, JDK 17 and newer perform stricter module encapsulation checks. Modularized libraries depending on Error Prone annotations 2.26.x and newer may see errors like:

error: package com.google.errorprone.annotations is not visible
import com.google.errorprone.annotations.CheckReturnValue;
                            ^
  (package com.google.errorprone.annotations is declared in module com.google.errorprone.annotations, but module ... does not read it)

The fix is to add requires static to the module declaration of modularized libraries that depend on Error Prone annotations:

 module your.module {
...
+  requires static com.google.errorprone.annotations;
 }

---

Full Changelog: v2.26.0...v2.26.1

Error Prone 2.26.0

Warning: This release contains a bug, please use 2.26.1 or newer instead.

Changes:

• The 'annotations' artifact now includes a module-info.java for Java Platform Module System support, thanks to @sgammon in #4311.
• Disabled checks passed to -XepPatchChecks are now ignored, instead of causing a crash. Thanks to @oxkitsune in #4028.

New checks:

• SystemConsoleNull: Null-checking System.console() is not a reliable way to detect if the console is connected to a terminal.
• EnumOrdinal: Discourage uses of Enum.ordinal()

Closed issues: #2649, #3908, #4028, #4311, #4314

Full Changelog: v2.25.0...v2.26.0

Error Prone 2.25.0

New checks:

• JUnitIncompatibleType: Detects incompatible types passed to an assertion, similar to TruthIncompatibleType
• RedundantSetterCall: Detects fields set twice in the same chained expression. Generalization of previous ProtoRedundantSet check to also handle AutoValue.

Closed issues: #4195, #4224, #4228, #4248, #4249, #4251

Full Changelog: v2.24.1...v2.25.0