Sandbox::https://github.com/coveragepy/coveragepy/issues

`lcov` considers Coverage's function data inconsistent with its line data

coveragepy/coveragepy#2394 · opened

on Nov 13, 2026

An error in the C tracer's call handling records arcs into the previous frame's file

coveragepy/coveragepy#2385 · opened

on Nov 9, 2026

1

Lines recorded by other threads during a flush are lost

coveragepy/coveragepy#2384 · opened

on Nov 9, 2026

1

A KeyboardInterrupt while the C tracer holds data_lock leaves it locked, and save() hangs

coveragepy/coveragepy#2383 · opened

on Nov 9, 2026

json: show_contexts gives every function and class the whole file's contexts

coveragepy/coveragepy#2374 · opened

on Nov 9, 2026

HTML report shows stale contexts after an incremental re-run

coveragepy/coveragepy#2372 · opened

on Nov 9, 2026

Notebook kernel coverage lost under pytest + nbval + pytest-cov (combine prints "Skipping duplicate data"). Since 7.13.1

coveragepy/coveragepy#2370 · opened

on Nov 8, 2026

1

Combining unexecuted default-tracer files with plugin measurements raises a tracer conflict

coveragepy/coveragepy#2358 · opened

on Nov 3, 2026

1

Deadlock in `switch_context()` when the GC runs measured code while `_clear_data` holds `data_lock`

coveragepy/coveragepy#2348 · opened

on Oct 25, 2026

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

coveragepy/coveragepy#2313 · opened

on Sep 30, 2026

1

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

coveragepy/coveragepy#2310 · opened

on Sep 29, 2026

Switch from optparse to argparse?

coveragepy/coveragepy#2308 · opened

on Sep 28, 2026

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

coveragepy/coveragepy#2303 · opened

on Sep 25, 2026

2

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

coveragepy/coveragepy#2302 · opened

on Sep 25, 2026

3

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

coveragepy/coveragepy#2287 · opened

on Sep 20, 2026

1

Plans for MC/DC coverage?

coveragepy/coveragepy#2255 · 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 · opened

on Aug 5, 2026

3

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

coveragepy/coveragepy#2249 · opened

on Aug 3, 2026

1

module import breaks when using threads

coveragepy/coveragepy#2247 · opened

on Jul 30, 2026

1

coverage.py reports executed async lines as missing

coveragepy/coveragepy#2245 · opened

on Jul 28, 2026

2

Random/flaky "No source for code" errors

coveragepy/coveragepy#2195 · opened

on Jun 17, 2026

5

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

coveragepy/coveragepy#2189 · opened

on Jun 9, 2026

should _get_file_reporter get maxsize=None?

coveragepy/coveragepy#2182 · opened

on May 30, 2026

4

Option to show missed code lines

coveragepy/coveragepy#2179 · opened

on May 22, 2026

4

Feature request: exclude coverage collected while executing specific tests

coveragepy/coveragepy#2178 · opened

on May 22, 2026

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Issues

Issues

`lcov` considers Coverage's function data inconsistent with its line data

An error in the C tracer's call handling records arcs into the previous frame's file

Lines recorded by other threads during a flush are lost

A KeyboardInterrupt while the C tracer holds data_lock leaves it locked, and save() hangs

json: show_contexts gives every function and class the whole file's contexts

HTML report shows stale contexts after an incremental re-run

Notebook kernel coverage lost under pytest + nbval + pytest-cov (combine prints "Skipping duplicate data"). Since 7.13.1

Combining unexecuted default-tracer files with plugin measurements raises a tracer conflict

Deadlock in `switch_context()` when the GC runs measured code while `_clear_data` holds `data_lock`

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

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

Switch from optparse to argparse?

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

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

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

Plans for MC/DC coverage?

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

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

module import breaks when using threads

coverage.py reports executed async lines as missing

Random/flaky "No source for code" errors

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

should _get_file_reporter get maxsize=None?

Option to show missed code lines

Feature request: exclude coverage collected while executing specific tests