Tests

Mark code after for loops that never end as unreachable #20086

Job	Run time
Test mypyc suite with 32-bit Python	9m 46s
Test suite with py313-ubuntu, mypyc-compiled	14m 43s
Type check our own code (py310-windows-64)	2m 47s
Test suite with py311-ubuntu	9m 30s
Test suite with py314-windows-64	27m 35s
Test suite with py310-ubuntu, mypyc-compiled	15m 0s
mypyc runtime tests with py313-macos	5m 49s
Parallel tests with py314-ubuntu, interpreted	23m 27s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 11s
Test suite with py314-ubuntu, mypyc-compiled	15m 23s
Test suite with py314t-ubuntu, mypyc-compiled	17m 1s
mypyc runtime tests with py310-ubuntu	5m 38s
Formatting and code style with Black + ruff	2m 2s
Test suite with py312-ubuntu	10m 6s
Type check our own code (py310-ubuntu)	1m 28s
	3h 7m 26s

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