facebook/hhvm

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A virtual machine for executing programs written in Hack.

Stars: 18.7k
Forks: 3.1k
Open beginner issues: 0
Indexed issues: 410
Avg merge: 1h 47m
Merged PRs (30d): 2

Dominant language: C++
License: No license data
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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410 open issues indexed

[Feature request] add curl http2 push support Open

feature request

facebook/hhvm#8507 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
File prev_skip_content opened but not closed. Open

facebook/hhvm#8509 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Feature Request ] Top-level `use` statements should be permitted before namespace declarations/blocks Open

feature request

facebook/hhvm#8514 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Feature Request] Make use statements of nonexistant entities raise a typechecker error Open

feature request hack

facebook/hhvm#8524 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Feature Request] Implement __LateInit for an entire class Open

feature request

facebook/hhvm#8533 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
missing webp support in getimagesize and friends Open

feature request

facebook/hhvm#8539 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Regression | Typechecker] Switch cases have become far less strict Open

hack regression

facebook/hhvm#8544 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Exit with a clear error if we attempt to compile when in repo-authoritative mode Open

facebook/hhvm#8547 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
LSP mode does not auto-start hh_server Open

facebook/hhvm#8548 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
SoapClient can't manage some fault codes. Open

facebook/hhvm#8553 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Union Types Open

feature request hack wishlist

facebook/hhvm#8559 · 13 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
[Documentation] Remove the old wiki Open

facebook/hhvm#8564 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Feature Request] Add a way to set a charset for AsyncMysqlConnection Open

feature request

facebook/hhvm#8580 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Typechecker] Checking for `\HH\FunctionAttribute` and friends when used as an attribute fails on generic classes Open

hack

facebook/hhvm#8583 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Feature Request ] Allow for a single throw statement as a body of an expression bodied lambda Open

feature request

facebook/hhvm#8587 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
defer statement Open

feature request hack

facebook/hhvm#8604 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[RFC] CLI For Starting New Projects Open

feature request

facebook/hhvm#8605 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing some of libsodium constants Open

probably easy

facebook/hhvm#8608 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Suggestion: Improve typechecker error for refinement on container keys Open

hack

facebook/hhvm#8620 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Adding variable and function names to heapgraph and objprof Open

facebook/hhvm#8622 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Heapgraph sampling and visualization tooling Open

facebook/hhvm#8623 · 9 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Provide tooling for analysing xenon / IntervalTimer results Open

facebook/hhvm#8625 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Core dump when killing CLI server Open

facebook/hhvm#8631 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Typechecker] Missing typechecker error when redeclared properties in traits with stricter accessibility modifiers Open

hack

facebook/hhvm#8636 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Runtime ] make `is` and `as` checks on enums not do string to int conversion Open

facebook/hhvm#8651 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add contribution guide to Hacklang Open

facebook/hhvm#8657 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
No typechecker error for undefined shape fields with inferred TAny value type Open

facebook/hhvm#8658 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
HH Client hangs when starting with VS Code open Open

facebook/hhvm#8659 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[vsdebug] Segfault in running script when VS Code debugger tries to attach Open

facebook/hhvm#8667 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[vsdebug] "Invalid variable attributes" error when trying to inspect variables during debugging Open

facebook/hhvm#8668 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
running hhas files in server mode Open

facebook/hhvm#8673 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Segmentation fault ] Using `SQL\Query->toString__FOR_DEBUGGING_ONLY()` causes a segmentation fault when a query is also running Open

crash

facebook/hhvm#8678 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ TypeChecker ] False positive on uncomparable types in switch statements Open

facebook/hhvm#8683 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Slow Open

facebook/hhvm#8689 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bogus "Unrecognized user attribute: __Enforceable starts with __ but is not a standard attribute" error Open

facebook/hhvm#8706 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[ TypeChecker ] Enable `disallow_discarded_nullable_awaitables` by default Open

hack

facebook/hhvm#8707 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Runtime ] Invoking a static method on an interface is allowed and works if your return type is nullable or void Open

facebook/hhvm#8711 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Typechecker ] Invoking a static method on a classname of an interface is allowed, but a reified T of an interface is not Open

hack

facebook/hhvm#8712 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Feature Request | Typechecker ] Add __NonAbstract as a built-in attribute for invoking static methods safely on reified types given `T as interfacename` Open

feature request hack

facebook/hhvm#8713 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Typing[4361] An exception occurred while typechecking Open

hack

facebook/hhvm#8714 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Feature Request ] try {} catch {} multiple-catch Open

feature request

facebook/hhvm#8717 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
hhbc regression: symlinks lead to duplicate definitions Open

facebook/hhvm#8719 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Typechecker | Bug ] Constructor calls allowed on unconstrained \HH\classname<T> (unsound) Open

hack

facebook/hhvm#8720 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ Runtime ] Can't invoke Hack script with exotic characters in the file path Open

facebook/hhvm#8729 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ TypeChecker ] Generic methods with different amount of generics make subtypes not substitutable for their supertypes Open

hack

facebook/hhvm#8730 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
XMLReader isEmptyElement property inconsistent between 4.32 and 4.56 Open

facebook/hhvm#8734 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[ AsyncMysql ] Data loss when selecting MYSQL_TYPE_LONGLONG with mapRowsTyped or vectorRowsTyped Open

facebook/hhvm#8735 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
stream_socket_enable_crypto() with any TLS crypto methods are broken Open

facebook/hhvm#8758 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Failure to detect unsafe generic return Open

hack

facebook/hhvm#8761 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
unset() is considered undefined in the HHVM debugger Open

facebook/hhvm#8762 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026

facebook/hhvm

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