bpo-13487: Use sys.modules.copy() in inspect.getmodule() for thread s…

bpo-13487: Use sys.modules.copy() in inspect.getmodule() for thread s… · python/cpython@85cf1d5

Original file line number	Diff line number	Diff line change
`@@ -741,7 +741,7 @@ def getmodule(object, _filename=None):`
`741`	`741`	`return sys.modules.get(modulesbyfile[file])`
`742`	`742`	`# Update the filename to module name cache and check yet again`
`743`	`743`	`# Copy sys.modules in order to cope with changes while iterating`
`744`		`-for modname, module in list(sys.modules.items()):`
	`744`	`+for modname, module in sys.modules.copy().items():`
`745`	`745`	`if ismodule(module) and hasattr(module, '__file__'):`
`746`	`746`	`f = module.__file__`
`747`	`747`	`if f == _filesbymodname.get(modname, None):`