facebookincubator/MetaPython

View on GitHub

This is Meta's fork of the CPython runtime. The name "cinder" here is historical, see https://github.com/facebookincubator/cinderx for the Python extension / JIT compiler.

Stars: 3.8k
Forks: 139
Open beginner issues: 0
Indexed issues: 31

Dominant language: Python
License: No license data
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

31 issues indexed so far

Calling `_imp.is_lazy_imports_enabled` in a thread hits an `assert(0)` Open

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

facebookincubator/MetaPython#147 · Opened Dec 5, 2024
Confusing int64 error at cyclic class boundary Open

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

facebookincubator/MetaPython#146 · 2 comments · Opened Oct 22, 2024
Cannot use field twice after an `is not None` check? Open

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

facebookincubator/MetaPython#145 · 4 comments · Opened Sep 26, 2024
Confusing error using primitive as Dict key Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

facebookincubator/MetaPython#144 · 1 comment · Opened Aug 14, 2024
Cannot install insightface by python-cinder Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

facebookincubator/MetaPython#129 · 2 comments · Opened Nov 21, 2023
type aliases no longer work? Open

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

facebookincubator/MetaPython#116 · 2 comments · Opened Jun 15, 2023
fannkuch benchmark & implicit returns Open

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

facebookincubator/MetaPython#115 · 1 reaction · Opened Jun 15, 2023
Build error: C++20 ambiguous & forming offset 4 is out of the bounds Open

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

facebookincubator/MetaPython#114 · 1 comment · Opened Jun 10, 2023
HPy support Open

facebookincubator/MetaPython#88 · 3 comments · 2 reactions · 1 assignee · Opened Jul 14, 2022
No pattern found for opcode Fadd: Xxr Open

sp-correctness staticpython

Difficulty 4/5 3-5 days Newbie friendliness 38/100

facebookincubator/MetaPython#87 · 2 comments · Opened Jul 4, 2022
nonsensical TypeError from "-X jit -m compile --static" Open

sp-correctness staticpython

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

facebookincubator/MetaPython#86 · 3 comments · Opened Jul 4, 2022
can't compare double to Literal Open

sp-correctness staticpython

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

facebookincubator/MetaPython#85 · 1 comment · Opened Jul 4, 2022
15 failing tests fail when running `make test` on a Mac Open

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

facebookincubator/MetaPython#73 · 1 comment · Opened May 2, 2022
Benchmark Cinder vs. Cpython performance; improve pipeline and performance of the Cinder build Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

facebookincubator/MetaPython#72 · 15 comments · 2 reactions · Opened May 2, 2022
questions about CheckedDict and unknown types Open

sp-ux staticpython

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

facebookincubator/MetaPython#71 · 5 comments · Opened Mar 14, 2022
add README for benchmarks Open

staticpython

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

facebookincubator/MetaPython#67 · 7 comments · Opened Jan 28, 2022
`and` fails to refine `Optional[T]` Open

sp-correctness staticpython

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

facebookincubator/MetaPython#63 · 1 reaction · Opened Dec 29, 2021
better static checks on initializing CheckedDict variables with dictionary literals Open

sp-adoption staticpython

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

facebookincubator/MetaPython#60 · 1 comment · Opened Dec 21, 2021
Why does `1 + "foo"` type check? Open

sp-ux staticpython

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

facebookincubator/MetaPython#52 · 8 comments · Opened Oct 14, 2021
Accessing undeclared field does not raise a type error Open

sp-correctness staticpython

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

facebookincubator/MetaPython#51 · 2 comments · Opened Oct 14, 2021
undefined variables do not raise a type error Open

sp-correctness staticpython

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

facebookincubator/MetaPython#50 · 3 comments · Opened Oct 8, 2021
`Union[str, int]` is treated as `dynamic` Open

sp-correctness staticpython

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

facebookincubator/MetaPython#49 · 6 comments · Opened Oct 3, 2021
2021 H2 static Python roadmap Open

staticpython

Difficulty 5/5 Over a week Newbie friendliness 15/100

facebookincubator/MetaPython#44 · 3 reactions · Opened Jul 22, 2021
What would it take to make unhashable dict key a static error? Open

sp-correctness staticpython

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

facebookincubator/MetaPython#40 · 1 comment · Opened Jul 15, 2021
Improve handling of Type[...] so distinguish between types and instances properly Open

sp-correctness staticpython

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

facebookincubator/MetaPython#33 · Opened Jul 6, 2021
-X jit-enable-jit-list-wildcards has high overhead Open

cinder-jit

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

facebookincubator/MetaPython#29 · 1 comment · Opened Jun 17, 2021
Static Python: primitive types don't support pow operator Open

sp-correctness staticpython

facebookincubator/MetaPython#25 · 1 assignee · Opened Jun 9, 2021
jit-list wildcards: support "name.*" for <qualname> Open

cinder-jit

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

facebookincubator/MetaPython#24 · Opened Jun 9, 2021
have cinderjit.force_compile() override jit list Open

cinder-jit

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

facebookincubator/MetaPython#19 · 4 comments · Opened May 27, 2021
opt-in to JIT compile Open

cinder-jit

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

facebookincubator/MetaPython#18 · 15 comments · Opened May 27, 2021
Add compilation statistics for static python Open

sp-adoption staticpython

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

facebookincubator/MetaPython#17 · 4 comments · 1 reaction · Opened May 25, 2021

facebookincubator/MetaPython

Get new issues in your inbox