Owner

Vineflower

3 indexed repositories · View on GitHub

vineflower
Modern Java decompiler aiming to be as accurate as possible, with an emphasis on output quality. Fork of the Fernflower decompiler.

Java · 2367 stars
vineflower-intellij
Intellij IDEA plugin that adds Vineflower support

Kotlin · 43 stars
vineflower-site
The source code of https://vineflower.org/

Python · 3 stars

Beginner friendly Everything

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Downcasts on superclass parameters disappear, changing exceptions and field reads Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

Vineflower/vineflower#623 · Opened Sep 7, 2026
Array cast is lost after assigning an array to an Object parameter Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Vineflower/vineflower#622 · Opened Sep 7, 2026
Null-initialized String local is emitted as Object without a receiver cast Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

Vineflower/vineflower#621 · Opened Sep 7, 2026
Invalid Override annotation is added for a private superclass method Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

Vineflower/vineflower#620 · Opened Sep 7, 2026
Switch breaks refer to an out-of-scope label attached to a preceding if Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

Vineflower/vineflower#619 · Opened Sep 7, 2026
Merging different primitive array types produces an incompatible local declaration Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Vineflower/vineflower#618 · Opened Sep 7, 2026
Reference comparisons lose required casts, producing incomparable types Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

Vineflower/vineflower#617 · Opened Sep 7, 2026
Failed to decompile mixin Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#616 · Opened Sep 3, 2026
failed to load plugin descriptor Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#613 · Opened Aug 6, 2026
Anonymous class does not have Class Kotlin metadata Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#610 · Opened Jul 22, 2026
Duplicated field value is decompiled as a second field read Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Vineflower/vineflower#607 · 1 comment · Opened Jul 12, 2026
Method call incorrectly moved after loop when return value left on stack Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Vineflower/vineflower#606 · Opened Jul 10, 2026
Generic method reference loses its type after decompilation → `incompatible types: invalid method reference` Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#600 · 4 comments · Opened Jun 22, 2026
Failed to save class when decompiling specific class files in a JAR Open

Priority: Medium Subsystem: IO Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 62/100

Vineflower/vineflower#593 · Opened May 22, 2026
Object array overload cast is dropped, selecting void overload Open

Priority: Medium Subsystem: Writing Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

Vineflower/vineflower#582 · 1 comment · Opened May 9, 2026
Private base method call drops required receiver cast Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Vineflower/vineflower#581 · Opened May 9, 2026
Integer locals are narrowed too aggressively Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#579 · 2 comments · Opened May 9, 2026
Unboxing method call decompiles to invalid bare cast statement Open

Priority: Medium Subsystem: Writing Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

Vineflower/vineflower#575 · 1 comment · Opened May 9, 2026
Reference/int slot reuse emits invalid Java Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#574 · 1 comment · Opened May 9, 2026
String concatenation with object operands makes the resulting variable `Object` Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Vineflower/vineflower#573 · Opened May 9, 2026
Static field initialization reordered incorrectly Open

Priority: Low Subsystem: Writing Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Vineflower/vineflower#572 · Opened May 9, 2026
Parsing Failure on nested Try-Finally statement Open

Priority: Medium Subsystem: Parsing

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#568 · 6 comments · Opened Apr 29, 2026
constantdynamic Open

needs-info

Difficulty 5/5 Over a week Newbie friendliness 10/100

Vineflower/vineflower#548 · 1 comment · Opened Mar 17, 2026
This plugin is broken due to https://s01.oss.sonatype.org being decommissioned Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

Vineflower/vineflower-intellij#38 · 4 comments · Opened Feb 19, 2026
Method decompilation failed: Could not find destination nodes for stat id {If} Open

Priority: Medium Subsystem: Statement Structure Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Vineflower/vineflower#543 · 1 comment · Opened Feb 8, 2026
Errors decompiling HytaleServer.jar Open

Priority: Medium Subsystem: Statement Structure Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Vineflower/vineflower#539 · 4 comments · Opened Jan 17, 2026
Class qualifier removed if same field name in current class exists during assignment Open

Priority: Low Subsystem: Writing Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Vineflower/vineflower#538 · Opened Jan 17, 2026
[REGRESSION] failure to reconstruct generic types for locals/expressions Open

Priority: Medium regression Subsystem: Generics

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Vineflower/vineflower#536 · Opened Jan 11, 2026
"File name too long" error Open

Priority: Low Subsystem: IO Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#534 · 4 comments · Opened Jan 5, 2026
Skip extra files option doesn't affect folders themselves Open

Priority: Medium Subsystem: IO Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Vineflower/vineflower#528 · Opened Dec 14, 2025
Cannot run the CLI with only one jar and output to console Open

Priority: Medium Subsystem: User-Facing Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Vineflower/vineflower#514 · Opened Nov 14, 2025
Inconsistent renaming when LVT entries clash Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#501 · Opened Oct 24, 2025
The variable name resolve error Open

Priority: Low Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

Vineflower/vineflower#479 · Opened May 23, 2025
Update to 2024.3.5 Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

Vineflower/vineflower-intellij#36 · 1 comment · 4 reactions · Opened Mar 19, 2025
Decompilation failure with kotlin `crossinline` lambdas crossinlined into a suspending context Open

Priority: Medium Subsystem: Plugins/Kotlin Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Vineflower/vineflower#470 · Opened Mar 10, 2025
`Class initialization must not depend on services` if first class decompiling starts early Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Vineflower/vineflower-intellij#35 · Opened Mar 3, 2025
Local variables are sometimes not declared Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

Vineflower/vineflower#467 · 2 comments · 2 reactions · Opened Mar 2, 2025
`StackOverflowError` when trying to decompile any class Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

Vineflower/vineflower-intellij#34 · Opened Feb 28, 2025
Security issue, no way to notify privately Open

Priority: Low Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 15/100

Vineflower/vineflower#447 · 4 comments · Opened Dec 17, 2024
Failed to decompile dex2jar'd class Open

Priority: Low Subsystem: Parsing Type: Bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

Vineflower/vineflower#441 · 1 comment · Opened Nov 19, 2024
Exception in Vineflower with Jetbrains Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

Vineflower/vineflower-intellij#33 · Opened Nov 10, 2024
Replace Thread.stop with cancellation Open

Priority: Medium Subsystem: IO Type: Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#438 · 2 reactions · Opened Nov 2, 2024
Straight up refuses to download vineflower after IntelliJ update Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Vineflower/vineflower-intellij#32 · 3 comments · Opened Oct 15, 2024
Exception `Error while getting the language of /home/user/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.9.22/d6c44cd08d8f3f9bece8101216dbe6553365c6e3/kotlin-stdlib-1.9.22.jar!/kotlin/reflect/reflect.kotlin_builtins` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower-intellij#31 · 1 comment · Opened Oct 12, 2024
Logging is too verbose Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

Vineflower/vineflower-intellij#30 · Opened Oct 12, 2024
Exception `Class initialization must not depend on services` with 2024.3 eap Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

Vineflower/vineflower-intellij#29 · Opened Oct 12, 2024
Cannot load renamer Open

Priority: Medium Subsystem: Plugins Type: Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Vineflower/vineflower#433 · Opened Sep 28, 2024
Empty node.getTypeParameters() for some classes from commons-text-1.10.0.jar Open

Priority: Low Subsystem: Generics Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Vineflower/vineflower#419 · Opened Aug 20, 2024
Improve handling of duplicate classes Open

Priority: Medium Subsystem: Writing Type: Enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

Vineflower/vineflower#416 · Opened Aug 18, 2024
Missing cast for generic method invocation on raw parameterized class instance Open

Priority: Medium Subsystem: Variables Type: Bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Vineflower/vineflower#408 · Opened Jul 21, 2024

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