oracle/graal

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GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

Stars: 21.7k
Forks: 1.8k
Open beginner issues: 0
Indexed issues: 678
Avg merge: 16h 11m
Merged PRs (30d): 145

Dominant language: Java
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

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678 open issues indexed

[Native Image] Crema: superclass finality read from InnerClasses, rejecting valid subclasses (Kotlin enums with constant bodies) Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

oracle/graal#14468 · Opened Sep 17, 2026
[Native Image] MethodHandle invoke Jackson usage pattern very slow compared with JVM mode Open

bug native-image

oracle/graal#14445 · 2 comments · 1 reaction · 1 assignee · Opened Sep 14, 2026
Truffle compiler calls `toString()` on node fields during PE compilation Open

bug truffle

oracle/graal#14406 · 1 assignee · Opened Sep 8, 2026
[DAP] Server remains listening but does not accept subsequent connections after debugger disconnect Open

bug tools

oracle/graal#14392 · 1 assignee · Opened Sep 7, 2026
native-image: priority inliner leaves a hot dispatch chain out of line, defeating partial escape analysis (3.5x) Open

bug native-image

oracle/graal#14387 · 3 comments · 1 assignee · Opened Sep 7, 2026
[GR-79476][Native Image] RuntimeOptionFeature fails on multilayer builds Open

bug native-image

oracle/graal#14386 · 2 comments · 2 assignees · Opened Sep 7, 2026
[GR-79472] `struct.new_default` leaves `v128` fields uninitialized (NullPointerException on first read) Open

bug graalwasm

oracle/graal#14381 · 1 assignee · Opened Sep 4, 2026
findStaticVarHandle returns the superclass's static field when the subclass field is not registered for reflection Open

bug native-image

oracle/graal#14346 · 2 comments · 1 assignee · Opened Aug 31, 2026
graalpy-maven-plugin`'s own bootstrap classpath omits the Truffle NFI language, so anything needing `_ctypes` fails Open

bug python

oracle/graal#14339 · 1 assignee · Opened Aug 30, 2026
Meson (vendored in numpy's sdist) can't detect `cl.exe` when the newest installed VS instance is "Visual Studio 18" (2026) Open

bug python

oracle/graal#14338 · 1 comment · 1 assignee · Opened Aug 30, 2026
[GR-79625] graalpy-maven-plugin` 25.3.4.1: launcher creation fails with `FileNotFoundError` for `graalpy.exe` on Windows Open

bug python

oracle/graal#14337 · 1 assignee · Opened Aug 30, 2026
[GR-79193][Native Image] Ristretto: enterprise byte[] arraycopy with INIT_LOCATION has no descriptor Open

bug native-image

oracle/graal#14312 · 1 comment · 2 assignees · Opened Aug 26, 2026
[GR-79187][Native Image] Ristretto: mixed SubstrateType/RistrettoType stamp meet throws ClassCastException Open

bug native-image

oracle/graal#14311 · 2 assignees · Opened Aug 26, 2026
[GR-78968][Native Image] Ristretto: type profile probabilities can sum above 1.0 (racy denominator in MethodProfile.TypeProfile.toTypeProfile) Open

bug native-image

oracle/graal#14293 · 2 comments · 1 assignee · Opened Aug 22, 2026
[Native Image] Class.forName fails for an image-present class initializing in its own <clinit> (regression since 25.0.4) Open

bug native-image

oracle/graal#14280 · 1 assignee · Opened Aug 20, 2026
[GR-79121][Native Image] `-O1` causes `NullPointerException` in Compose Runtime `ScopeMap.set` during state invalidation Open

bug compiler native-image

oracle/graal#14263 · 1 reaction · 1 assignee · Opened Aug 17, 2026
[Native Image] Fatal error: Unexpected exception in MonitorSupport.monitorEnter: java.lang.NullPointerException: null Open

bug native-image

oracle/graal#14259 · 1 comment · 1 assignee · Opened Aug 17, 2026
[Native Image] Heap Corruption from ConstantValue fields of runtime-initialized classes Open

bug native-image

oracle/graal#14256 · 1 comment · 1 assignee · Opened Aug 15, 2026
[GR-79082] Polyglot isolates: Engine.close() silently skips isolate teardown after any eval — ~32GB reservation and committed heap stay mapped Open

bug truffle

oracle/graal#14252 · 1 assignee · Opened Aug 14, 2026
[Native Image] ClassCastException during points-to analysis on JDK 25 (LambdaSubstitutionType -> HotSpotResolvedObjectTypeImpl) Open

bug native-image

oracle/graal#14211 · 1 comment · 1 assignee · Opened Aug 10, 2026
[Web Image] --tool:svm-wasm: AtomicReferenceFieldUpdater.newUpdater throws NullPointerException at run time Open

bug native-image

oracle/graal#14194 · 2 assignees · Opened Aug 7, 2026
[Web Image] --tool:svm-wasm: unhandled UNSTRUCTURED_LOCKING in WebImageImplicitExceptionsFeature aborts code generation Open

bug native-image

oracle/graal#14193 · 1 comment · 2 assignees · Opened Aug 6, 2026
[Web Image] --tool:svm-wasm: "Incorrect single abstract method logic" for a non-functional interface reaching the JS boundary Open

bug native-image

oracle/graal#14192 · 1 comment · 2 assignees · Opened Aug 6, 2026
Layered images: no working configuration for a Kotlin/Compose Desktop application (3 blockers) Open

bug native-image

oracle/graal#14166 · 2 comments · 1 assignee · Opened Aug 4, 2026
[GR-78892]SubstrateVM: Panama FFI downcalls crash with 'Must either be at a safepoint or in native mode' under concurrent stress Open

bug native-image

oracle/graal#14146 · 1 comment · 3 assignees · Opened Aug 2, 2026
Truffle 24.2+: boolean frame slots always read back false on big-endian platforms Open

bug truffle

oracle/graal#14143 · 2 assignees · Opened Jul 31, 2026
[GR-78727][Question][Native Image]: Is there an existing or planned way to determine what caused a shared library to be emitted next to the executable? Open

feature native-image

oracle/graal#14134 · 1 comment · 1 assignee · Opened Jul 31, 2026
[GR-78004] Vector API escape analyis couples unrelated instances through mask identity Open

bug compiler

oracle/graal#14100 · 3 comments · 1 assignee · Opened Jul 28, 2026
[Native Image] DefaultVirtualInvokeTypeFlow.onObservedUpdate hits shouldNotReachHere on a PrimitiveTypeState receiver from a @CStruct word type Open

bug native-image

oracle/graal#14078 · 1 comment · 1 assignee · Opened Jul 27, 2026
[GR-78049][Native Image] user.home property is "?" where HotSpot falls back to $HOME Open

bug native-image

oracle/graal#14072 · 2 assignees · Opened Jul 25, 2026
Expose current statement count on polyglotContext for metrics Open

feature truffle

oracle/graal#14009 · 1 assignee · Opened Jul 20, 2026
[GR-51307] Add GC NotificationEmitter Support to Native Image Open

feature native-image

oracle/graal#13995 · 1 reaction · 1 assignee · Opened Jul 16, 2026
[Native Image][Darwin] Swing GUI hangs: pthread main does not run AppKit CFRunLoop (Metal/CGL deadlock) Open

bug native-image

oracle/graal#13994 · 4 comments · 1 reaction · 1 assignee · Opened Jul 16, 2026
[GR-77850][Native Image] VMError$HostedError: Must be a non-abstract instance class when using `-H:Preserve=package=kotlin.*` Open

bug native-image

oracle/graal#13990 · 1 assignee · Opened Jul 16, 2026
[GR-77609][Native Image] Runtime locale derivation turns LC_CTYPE=UTF-8 into invalid Locale (language "utf-8"), diverging from HotSpot Open

bug native-image

oracle/graal#13978 · 2 assignees · Opened Jul 15, 2026
[GR-77783][Native Image][Tracing Agent] Reflective Field.get/set is over 100x slower on GraalVM 25 Open

bug native-image

oracle/graal#13975 · 1 comment · 2 assignees · Opened Jul 14, 2026
[GR-77780] Potentially unreachable / duplicate optimisations in MulNode Open

bug compiler

oracle/graal#13969 · 1 comment · 1 assignee · Opened Jul 14, 2026
[GR-77670][Native Image] readAllBytes in PathDigests will throw a OutOfMemoryError if NIL is ~2.15Gb Open

bug native-image

oracle/graal#13968 · 1 assignee · Opened Jul 14, 2026
[GR-77669][Native Image][Tracing Agent] AtomicReferenceFieldUpdater field metadata omitted on GraalVM 25 Open

bug native-image

oracle/graal#13967 · 2 assignees · Opened Jul 13, 2026
UnsatisfiedLinkError when loading JNativeHook DLL on Windows Native Image (GraalVM 25)[Native Image] Open

bug native-image

oracle/graal#13957 · 2 comments · 1 assignee · Opened Jul 11, 2026
Native Image: JNIRegistrationSupport.makeShimLibrary fails on Windows with ForeignAPISupport enabled Open

bug native-image

oracle/graal#13948 · 1 comment · 1 assignee · Opened Jul 9, 2026
[GR-77150] Missing optimizations in Vector API integer division Open

bug compiler

oracle/graal#13923 · 2 comments · 1 assignee · Opened Jul 5, 2026
[GR-77089] GraalPy Truffle Compatibility: Tag Emission Open

feature truffle

oracle/graal#13895 · 1 comment · 1 assignee · Opened Jun 30, 2026
[Native Image] Error Report: the inclusion of spring data JPA in spring boot project makes Locals overlap Open

bug native-image

oracle/graal#13835 · 3 assignees · Opened Jun 21, 2026
[Native Image] Socket.read on virtual thread can sometimes wait forever despite data being available Open

bug native-image

oracle/graal#13787 · 2 comments · 1 assignee · Opened Jun 16, 2026
[GR-71616] Crema: interpret non-AOT methods in partial types Open

feature native-image

oracle/graal#13783 · 1 assignee · Opened Jun 15, 2026
[GR-77363][Native Image] WebImage produce illegal character in output javascript Open

bug native-image

oracle/graal#13759 · 5 comments · 2 assignees · Opened Jun 11, 2026
[Native Image] `predElement is null` in `ELFSymtab.getOrDecideVaddr` when building large image with `-g` on GraalVM 25.0.1 Open

bug native-image

oracle/graal#13746 · 1 comment · 1 assignee · Opened Jun 9, 2026
[GR-76634][Native Image] MethodType internTable not working correctly with layered native images Open

bug native-image

oracle/graal#13700 · 2 assignees · Opened Jun 4, 2026
JFR: Main thread does not have an associated ThreadStart event Open

bug ibm-redhat-interest native-image-jfr

Difficulty 5/5 Over a week Newbie friendliness 35/100

oracle/graal#13671 · 2 comments · Opened Jun 1, 2026

oracle/graal

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