chakra-core/ChakraCore

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ChakraCore is an open source Javascript engine with a C API.

Stars: 9.3k
Forks: 1.2k
Open beginner issues: 0
Indexed issues: 582

Dominant language: JavaScript
License: MIT
Last GitHub push: Feb 19, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Open All

582 open issues indexed

No checks for overflow's Open

Suggestion

chakra-core/ChakraCore#5092 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
AllocationPolicy should be made more straightforward to use Open

Suggestion

chakra-core/ChakraCore#5114 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Functions evaluated in strict mode in console does not prevent implicit variables from being created in Edge Open

Bug Severity: 3

chakra-core/ChakraCore#5115 · 24 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Source code is missing for arm64 build Open

Answered Question Task Wiki

chakra-core/ChakraCore#5243 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
High heap fragmentation caused by sparse arrays Open

Memory

chakra-core/ChakraCore#5261 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Debug protocol is not 100% JSON compliant Open

Question

chakra-core/ChakraCore#5262 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Review Implementation of Async/Await Open

Task

chakra-core/ChakraCore#5293 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Global var set before evaluating function declaration in non-strict block Open

Bug Compatibility Severity: 3

chakra-core/ChakraCore#5340 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
No error for assignment to undefined inside extends expression Open

Bug Severity: 2

chakra-core/ChakraCore#5367 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Atomics.wake(...) always returns 0 on non-win32 platforms Open

Bug Severity: 2

chakra-core/ChakraCore#5368 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Debugger: Add support for breaking in debugger on unhandled promise rejection Open

Task

chakra-core/ChakraCore#5370 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Debugger: Support detecting pending promise reactions for "break on uhandled exceptions" Open

Task

chakra-core/ChakraCore#5371 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add Jenkins configuration for RS4 with Intl-ICU Open

Continuous Integration

chakra-core/ChakraCore#5373 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Perf : filling the array is taking time Open

Performance

chakra-core/ChakraCore#5386 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Confirm how dynamically built `ch` binary looks for the library Open

Dev Experience Feature Request

chakra-core/ChakraCore#5425 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Performance: Modulus operator is slow Open

Performance

chakra-core/ChakraCore#5432 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 14, 2026
Implement BigInt Open

ECMAScript Spec Task

chakra-core/ChakraCore#5440 · 1 comment · 7 reactions · 0 assignees · Indexed Sep 14, 2026
Bad performance when disable concurrent GC Open

Memory Performance

chakra-core/ChakraCore#5458 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Redeferral should update the total jitted code size, so new functions don't hit the max jitted code cap. Open

Bug Severity: 3

chakra-core/ChakraCore#5487 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Module namespace object when examined in debugger has no value, type, etc. Open

Dev Experience Severity: 2

chakra-core/ChakraCore#5499 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Inconsistent output compared with other JS engines Open

Bug Severity: 3

chakra-core/ChakraCore#5511 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
don't emit LdNativeCodeData if function doesn't use any Open

help wanted Performance

chakra-core/ChakraCore#5516 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Potential improvement for virtual typed array access Open

Performance

chakra-core/ChakraCore#5517 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Investigate and possibly fix asserts failing in baseline Open

Task

chakra-core/ChakraCore#5520 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to do profiling with ETW Open

Question

chakra-core/ChakraCore#5541 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
support `-forceSerialized` command line switch in ch Open

Test Bug

chakra-core/ChakraCore#5558 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Super property access in eval cases should throw SyntaxError not runtime error Open

Bug Severity: 3

chakra-core/ChakraCore#5559 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
seems a optimization bug when an object escaped Open

Bug Severity: 2

chakra-core/ChakraCore#5598 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Multi-threaded synchronization Open

Discussion

chakra-core/ChakraCore#5599 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Consider using Grisu3 + Dragon4 for double.ToString() conversion. Open

Performance Suggestion

chakra-core/ChakraCore#5609 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
OpHelpers returning non-int values lead to Infinite bailouts on some array operations Open

Performance Severity: 2

chakra-core/ChakraCore#5614 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Switch statement without reached the case block Open

Bug Severity: 2

chakra-core/ChakraCore#5630 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
RegExp memory efficiency: built-in negated character classes could use NegatedSet Open

Codebase Quality Performance Task

chakra-core/ChakraCore#5633 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Modified test: Xplat Debug only Recycler crash on exit Open

Test Bug

chakra-core/ChakraCore#5636 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Accessing `arguments.callee.caller` in sloppy callback to JsBuiltIn throws Open

Bug Severity: 3

chakra-core/ChakraCore#5642 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Wrong realization of TypedArray's toLocaleString() Open

Bug ES Spec Conformance Severity: 3

chakra-core/ChakraCore#5653 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[WebAssembly] Improve abort exception messages Open

Dev Experience Suggestion WebAssembly

chakra-core/ChakraCore#5668 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Implement spec-compliant CanonicalizeLanguageTag Open

Intl-ICU

chakra-core/ChakraCore#5674 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Debugger: stepping out into JsBuiltIn functions Open

Bug Severity: 3

chakra-core/ChakraCore#5694 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Error not thrown when calling eval() on an assignment expression that is not valid in strict mode within a computed property name within a class Open

Bug Severity: 3

chakra-core/ChakraCore#5696 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Property enumeration order of String exotic objects is wrong Open

Bug Compatibility ECMAScript Spec Severity: 2

chakra-core/ChakraCore#5697 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
StringTemplate Caching in eval is incorrect. Open

Bug ES Spec Conformance Severity: 2

chakra-core/ChakraCore#5728 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
review type checks that should be tautologically true Open

Task

chakra-core/ChakraCore#5737 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Fix OwnPropertyKeys order for String objects Open

Bug ES Spec Changed Severity: 3

chakra-core/ChakraCore#5738 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
*** stack smashing detected *** Open

chakra-core/ChakraCore#5781 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
nullptr in VALIDATE_INCOMING_REFERENCE causes a crash Open

Needs More Info

chakra-core/ChakraCore#5782 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Reducing the _X64WriteBarrierCardTableManager::_cardTable memory reservation Open

Question

chakra-core/ChakraCore#5821 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Symbol[[description]] cannot be undefined Open

ES Spec Conformance

chakra-core/ChakraCore#5833 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
JsCreateTypedArray has wrong SAL annotation Open

Bug Severity: 2

chakra-core/ChakraCore#5872 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Question: running debug builds on xplat without logging? Open

Bug OSX

chakra-core/ChakraCore#5876 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

chakra-core/ChakraCore

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