Curated Issues

C Good First Issues

Browse open source issues tagged with C in the issue metadata. Results stay focused on work that can become public contribution evidence.

1,912 matching issues

C

Slice signals

  • Average annotated difficulty: 2.7/5 across 1,912 issues.
  • 69% of 1,912 time estimates are one day or less.
Open
Critical thread initialization lost for NonStop builds
branch: 3.3branch: 3.4branch: 3.5branch: 3.6branch: masterhelp wantedtriaged: bug
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

openssl / openssl · #29854 · Jan 29, 2026 · C · 30,157 stars

15 comments0 reactions0 assignees
Open
Optimize base64 decoding when AVX is available
branch: masterhelp wantedtriaged: feature
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

openssl / openssl · #29739 · Jan 23, 2026 · C · 30,157 stars

2 comments4 reactions0 assignees
Open
windows server 2019 issue
help wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

memcached / memcached · #1261 · Jan 19, 2026 · C · 14,185 stars

6 comments0 reactions0 assignees
Open
[NEW] Cross cluster replication support
enhancementhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

valkey-io / valkey · #3066 · Jan 15, 2026 · C · 25,779 stars

10 comments7 reactions0 assignees
Open
[YSQL] Output the result of COMMIT or ROLLBACK
area/ysqlgood first issuekind/bugpriority/mediumstatus/awaiting-triage
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly label

yugabyte / yugabyte-db · #29929 · Jan 10, 2026 · C · 8,229 stars

0 comments0 reactions0 assignees
Open
分页查询超级表特别慢
help wantedquestion
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

taosdata / TDengine · #34193 · Jan 7, 2026 · C · 24,849 stars

4 comments0 reactions0 assignees
Open
AIX 7.2 test_lhash unit test failure on OpenSSL 3.5.4
branch: 3.5branch: 3.6branch: masterhelp wantedtriaged: bug
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

openssl / openssl · #29562 · Jan 6, 2026 · C · 30,157 stars

15 comments0 reactions0 assignees
Open
[Bug] Macros working weirdly in Windows
bughelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

qmk / qmk_firmware · #25922 · Jan 1, 2026 · C · 20,368 stars

0 comments0 reactions0 assignees