add reportUnreachable option

[DetachHead]

fixes #11

partially addresses #7. need to figure out why some unreachable code gets checked now but not others

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

dd-trace-py (https://github.com/DataDog/dd-trace-py)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:182:12 - error: "span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:182:17 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:183:12 - error: "span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:183:17 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:184:12 - error: "span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:184:17 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:185:12 - error: "span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_span.py:185:17 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:33:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:33:22 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:35:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:35:22 - error: Cannot access member "is_recording" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:36:5 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:36:15 - error: Cannot access member "end" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:63:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:63:22 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:64:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:64:22 - error: Cannot access member "is_recording" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:65:12 - error: "root" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:65:17 - error: Cannot access member "is_recording" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:66:5 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:66:15 - error: Cannot access member "end" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:67:5 - error: "root" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:67:10 - error: Cannot access member "end" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:131:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:131:22 - error: Cannot access member "_ddspan" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:133:12 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:133:22 - error: Cannot access member "is_recording" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:134:5 - error: "otel_span" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/opentelemetry/test_trace.py:134:15 - error: Cannot access member "end" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:549:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:549:14 - error: Cannot access member "error" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:550:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:550:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:551:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:551:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:552:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:552:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:554:14 - error: Argument of type "None" cannot be assigned to parameter "name" of type "str" in function "__init__"
+     "None" is incompatible with "str" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:555:5 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:555:7 - error: Cannot access member "_ignore_exception" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:558:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __enter__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:558:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __exit__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:558:14 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:562:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __enter__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:562:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __exit__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:562:14 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:565:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:565:14 - error: Cannot access member "error" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:566:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:566:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:567:30 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:567:32 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:568:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:568:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:581:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __enter__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:581:14 - error: Object of type "Unbound" cannot be used with "with" because it does not implement __exit__ (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:581:14 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:584:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:584:14 - error: Cannot access member "error" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:585:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:585:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:586:12 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:586:14 - error: Cannot access member "get_tag" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/dd-trace-py/tests/tracer/test_span.py:587:12 - error: "s" is unbound (reportUnboundVariable)

... (truncated 14 lines) ...

spack (https://github.com/spack/spack)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:305:30 - error: "pkg" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:305:34 - error: Cannot access member "tester" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:307:16 - error: "status" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:335:30 - error: "pkg" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:335:34 - error: Cannot access member "tester" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/test_suite.py:337:16 - error: "status" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:684:18 - error: "Unbound" is not iterable (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:684:18 - error: "to_be_checked" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:685:31 - error: "entry" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:703:12 - error: "file1" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:703:18 - error: Cannot access member "read" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:704:12 - error: "file2" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/filesystem.py:704:18 - error: Cannot access member "read" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:294:12 - error: "h" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:294:14 - error: Cannot access member "grouped_message" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:301:20 - error: "h" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:301:22 - error: Cannot access member "grouped_message" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:302:60 - error: "full_message" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:305:9 - error: "no_line_numbers" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:333:14 - error: "h" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:333:16 - error: Cannot access member "forward" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:336:15 - error: "h" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:336:17 - error: Cannot access member "grouped_message" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:337:12 - error: Operator "in" not supported for types "Literal['catch-runtime-error']" and "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:337:37 - error: "message" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:338:12 - error: Operator "not in" not supported for types "Literal['catch-value-error']" and "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lang.py:338:39 - error: "message" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:952:12 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:953:12 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:954:12 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:958:5 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:958:10 - error: Cannot access member "clear" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:961:22 - error: "lock" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:964:12 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:965:12 - error: "vals" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/test/llnl/util/lock.py:966:12 - error: "vals" is unbound (reportUnboundVariable)
- 23713 errors, 78 warnings, 0 informations 
+ 23749 errors, 78 warnings, 0 informations 

Tanjun (https://github.com/FasterSpeeding/Tanjun)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:146:9 - error: "mock_try_acquire" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:146:26 - error: Cannot access member "assert_awaited_once_with" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:146:61 - error: "mock_ctx" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:147:9 - error: "mock_release" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:147:22 - error: Cannot access member "assert_awaited_once_with" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:147:57 - error: "mock_ctx" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:148:9 - error: "mock_error_callback" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:148:29 - error: Cannot access member "assert_not_called" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:328:9 - error: "mock_try_acquire" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:328:26 - error: Cannot access member "assert_awaited_once_with" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:328:61 - error: "mock_ctx" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:329:9 - error: "mock_release" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:329:22 - error: Cannot access member "assert_awaited_once_with" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:329:57 - error: "mock_ctx" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:330:9 - error: "mock_error_callback" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/Tanjun/tests/dependencies/test_limiters.py:330:29 - error: Cannot access member "assert_not_called" for type "Unbound" (reportGeneralTypeIssues)
- 2376 errors, 6752 warnings, 0 informations 
+ 2392 errors, 6752 warnings, 0 informations 

koda-validate (https://github.com/keithasaurus/koda-validate)
+   /tmp/mypy_primer/projects/koda-validate/koda_validate/typehints.py:180:23 - error: "NotRequired" is not defined (reportUndefinedVariable)
+   /tmp/mypy_primer/projects/koda-validate/koda_validate/typehints.py:180:48 - error: "Required" is not defined (reportUndefinedVariable)
- 173 errors, 3 warnings, 0 informations 
+ 175 errors, 3 warnings, 0 informations 

trio (https://github.com/python-trio/trio)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:95:13 - error: Type of "exc" is unknown (reportUnknownVariableType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:95:20 - error: Type of "value" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:95:20 - error: Type of "exceptions" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:95:20 - error: "excinfo" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:95:28 - error: Cannot access member "value" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_exceptiongroup_gc.py:96:31 - error: "exc" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1038:16 - error: Type of "value" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1038:16 - error: Type of "__context__" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1038:16 - error: "excinfo" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1038:24 - error: Cannot access member "value" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1057:16 - error: Type of "value" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1057:16 - error: Type of "__context__" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1057:16 - error: "excinfo" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:1057:24 - error: Cannot access member "value" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:2163:10 - error: Type of "raises" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_core/_tests/test_run.py:2167:21 - error: "_create" is protected and used outside of the class in which it is declared (reportPrivateUsage)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:52:10 - error: Type of "raises" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:54:13 - error: Type of "add" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:54:13 - error: "to_close" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:54:22 - error: Cannot access member "add" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:55:13 - error: Type of "add" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:55:13 - error: "to_close" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_tcp_stream.py:55:22 - error: Cannot access member "add" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_unix_stream.py:34:12 - error: Type of "closed" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_unix_stream.py:34:12 - error: "c" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/_tests/test_highlevel_open_unix_stream.py:34:14 - error: Cannot access member "closed" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:255:33 - error: Argument type is unknown
+     Argument corresponds to parameter "resource" in function "aclose_forcefully" (reportUnknownArgumentType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:255:33 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:269:13 - error: Type of "cancel" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:269:13 - error: "scope" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:269:19 - error: Cannot access member "cancel" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:270:19 - error: Type of "aclose" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:270:19 - error: "r" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:270:21 - error: Cannot access member "aclose" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:273:13 - error: Type of "cancel" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:273:13 - error: "scope" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:273:19 - error: Cannot access member "cancel" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:274:19 - error: Type of "aclose" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:274:19 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:274:21 - error: Cannot access member "aclose" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:302:13 - error: Type of "cancel" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:302:13 - error: "scope" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:302:19 - error: Cannot access member "cancel" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:304:17 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:304:17 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:304:25 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:305:17 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:305:17 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:305:25 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:308:13 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:308:13 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:308:21 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:308:43 - error: "s" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:309:13 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:309:13 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:309:21 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:309:43 - error: "r" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:320:13 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:320:13 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:320:21 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:322:37 - error: Argument type is unknown
+     Argument corresponds to parameter "resource" in function "aclose_forcefully" (reportUnknownArgumentType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:322:37 - error: "r" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:326:42 - error: Object of type "None" cannot be called (reportOptionalCall)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:344:17 - error: Type of "start_soon" is unknown (reportUnknownMemberType)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:344:17 - error: "nursery" is unbound (reportUnboundVariable)
+   /tmp/mypy_primer/projects/trio/src/trio/testing/_check_streams.py:344:25 - error: Cannot access member "start_soon" for type "Unbound" (reportGeneralTypeIssues)

... (truncated 76 lines) ...