Issues

• Dotted --source/--cov names: parent import inside sys_modules_saved() + eviction desyncs single-phase C extensions on re-import (compiled SQLAlchemy repro)

  coveragepy/coveragepy#2324 · Filter by author francocaspani opened on Oct 4, 2026
  1

• SIGSEGV in CTracer_handle_call (tracer.c:540 / :547): pcur_entry->file_data holds string bytes, under concurrency = ["greenlet", "thread"]

  coveragepy/coveragepy#2313 · Filter by author alex-pominov opened on Sep 30, 2026

• sigterm = true: a SIGTERM that lands inside coverage's own code deadlocks the process or raises into it

  coveragepy/coveragepy#2310 · Filter by author kvnlng opened on Sep 29, 2026

• Switch from optparse to argparse?

  enhancement
  coveragepy/coveragepy#2308 · Filter by author edgarrmondragon opened on Sep 28, 2026

• sysmon + branch: statement after an async for whose iterator raises is reported as executed

  coveragepy/coveragepy#2303 · Filter by author SimplicityGuy opened on Sep 25, 2026
  1

• sysmon: starting and stopping a second Coverage in-process stops the outer one from recording new lines in already-seen code

  coveragepy/coveragepy#2302 · Filter by author SimplicityGuy opened on Sep 25, 2026
  3

• --fail-under prints a self-contradictory failure message

  coveragepy/coveragepy#2295 · Filter by author KRRT7 opened on Sep 22, 2026

• XML report: line-rate can be written in scientific notation

  coveragepy/coveragepy#2294 · Filter by author KRRT7 opened on Sep 22, 2026

• XML report: line-rate="1" when coverage is not 100%

  coveragepy/coveragepy#2293 · Filter by author KRRT7 opened on Sep 22, 2026

• --source=/ matches no files

  coveragepy/coveragepy#2291 · Filter by author Vaibhavtripathi7 opened on Sep 22, 2026

• source_pkgs doesn't measure files reported by plugins with dynamic source file names

  bug
  coveragepy/coveragepy#2287 · Filter by author brianhelba opened on Sep 20, 2026

• Increased Memory Usage with > 7.15.1

  bug
  coveragepy/coveragepy#2277 · Filter by author wyardley opened on Sep 5, 2026
  7

• HTML index: footer Total is recomputed in JS with toFixed(), can show 100% when coverage isn't 100%

  coveragepy/coveragepy#2256 · Filter by author siaklin99-gif opened on Aug 10, 2026
  2

• Plans for MC/DC coverage?

  enhancement
  coveragepy/coveragepy#2255 · Filter by author florianschanda opened on Aug 10, 2026
  1

• ResourceWarning: unclosed database still reproduces with [paths] config — a Coverage that only reports never registers its atexit cleanup

  coveragepy/coveragepy#2251 · Filter by author spacecoffin opened on Aug 5, 2026
  2

• Coverage tests fails with sysmon core and JIT-enabled Python 3.15

  bug
  coveragepy/coveragepy#2249 · Filter by author mgorny opened on Aug 3, 2026
  1

• module import breaks when using threads

  bug
  coveragepy/coveragepy#2247 · Filter by author haampie opened on Jul 30, 2026
  1

• coverage.py reports executed async lines as missing

  bug
  coveragepy/coveragepy#2245 · Filter by author rezatn0934 opened on Jul 28, 2026
  2

• Random/flaky "No source for code" errors

  bug
  coveragepy/coveragepy#2195 · Filter by author MetRonnie opened on Jun 17, 2026
  5

• --cov=module.submodule causes fatal crash with nanobind extensions

  bug
  coveragepy/coveragepy#2189 · Filter by author pdftl-dev opened on Jun 9, 2026

• should _get_file_reporter get maxsize=None?

  bug
  coveragepy/coveragepy#2182 · Filter by author KRRT7 opened on May 30, 2026
  4

• Option to show missed code lines

  enhancement
  coveragepy/coveragepy#2179 · Filter by author GergelyKalmar opened on May 22, 2026
  4

• Feature request: exclude coverage collected while executing specific tests

  enhancement
  coveragepy/coveragepy#2178 · Filter by author pomponchik opened on May 22, 2026

• sysmon is slower than ctrace on 3.14 for the Scrapy test suite

  bug
  coveragepy/coveragepy#2172 · Filter by author wRAR opened on May 16, 2026
  1

• 3.14: uncovered branch for single line class

  bug
  coveragepy/coveragepy#2167 · Filter by author bfis opened on May 5, 2026