Error Prone 2.33.0

Similar to release 2.32.0, the minimum supported JDK version to run Error Prone is JDK 17 (#3803). Using Error Prone to compile code that is deployed to earlier versions is still fully supported, but will require using JDK 17 or newer for compilation and setting --release or -source/-target/-bootclasspath.

Changes:

• Update protobuf version for CVE-2024-7254

New checks:

• ArrayRecordComponent: Record components should not be arrays.

Full changelog: v2.32.0...v2.33.0

Error Prone 2.32.0

The minimum support JDK version to run Error Prone is now JDK 17 (#3803).

Using Error Prone to compile code that is deployed to earlier versions is still fully supported, but will requires using JDK 17 or newer for compilation and setting --release or -source/-target/-bootclasspath.

Full changelog: v2.31.0...v2.32.0

Error Prone 2.31.0

This is the last planned minor release of Error Prone that will support running on JDK 11, see #3803. Using Error Prone to compile code that is deployed to earlier versions will continue to be fully supported, but will require using JDK 17 or newer for compilation and setting --release or -source/-target/-bootclasspath.

Changes:

• Introduce @ThreadSafeTypeParameter with enforcement by ThreadSafe
• Improved support for latest JDK 24 EA builds
• Error Prone is now distributed as a Multi-Release jar (#3756)

New checks:

• AutoValueBoxedValues: AutoValue instances should not usually contain boxed types that are not Nullable. We recommend removing the unnecessary boxing.

Full changelog: v2.30.0...v2.31.0

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