Description of problem: totem cannot be built in the f29-python side tag with Python 3.7:

|Appending LDFLAGS from environment: '-Wl,-z,relro  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld'
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/mesonbuild/compilers/compilers.py", line 799, in compile
    raise StopIteration
StopIteration
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/mesonbuild/mesonmain.py", line 364, in run
    app.generate()
  File "/usr/lib/python3.7/site-packages/mesonbuild/mesonmain.py", line 135, in generate
    self._generate(env)
  File "/usr/lib/python3.7/site-packages/mesonbuild/mesonmain.py", line 186, in _generate
    intr.run()
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 3261, in run
    super().run()
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 215, in run
    self.evaluate_codeblock(self.ast, start=1)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 239, in evaluate_codeblock
    raise e
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 231, in evaluate_codeblock
    self.evaluate_statement(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 246, in evaluate_statement
    return self.assignment(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 706, in assignment
    value = self.evaluate_statement(node.value)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 244, in evaluate_statement
    return self.function_call(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 504, in function_call
    return func(node, posargs, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 99, in wrapped
    return f(s, node_or_state, args, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 71, in wrapped
    return f(self, node, args, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 1926, in func_subproject
    return self.do_subproject(dirname, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 1970, in do_subproject
    subi.run()
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 3261, in run
    super().run()
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 215, in run
    self.evaluate_codeblock(self.ast, start=1)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 239, in evaluate_codeblock
    raise e
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 231, in evaluate_codeblock
    self.evaluate_statement(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 246, in evaluate_statement
    return self.assignment(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 706, in assignment
    value = self.evaluate_statement(node.value)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 248, in evaluate_statement
    return self.method_call(cur)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 538, in method_call
    return obj.method_call(method_name, args, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 140, in method_call
    return method(args, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreterbase.py", line 115, in wrapped
    return f(obj, args, kwargs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/interpreter.py", line 1215, in find_library_method
    linkargs = self.compiler.find_library(libname, self.environment, search_dirs)
  File "/usr/lib/python3.7/site-packages/mesonbuild/compilers/c.py", line 823, in find_library
    if self.links(code, env, extra_args=args):
  File "/usr/lib/python3.7/site-packages/mesonbuild/compilers/c.py", line 346, in links
    return self.compiles(code, env, extra_args, dependencies, mode='link')
  File "/usr/lib/python3.7/site-packages/mesonbuild/compilers/c.py", line 339, in compiles
    return p.returncode == 0
  File "/usr/lib64/python3.7/contextlib.py", line 119, in __exit__
    next(self.gen)
RuntimeError: generator raised StopIteration

This seems like a bug in meson.

https://koji.fedoraproject.org/koji/taskinfo?taskID=27917862

Version-Release number of selected component: totem-3.26.1-2.fc29, meson-0.46.1-2.fc29


How reproducible: fedpkg clone totem ... fedpkg build --target=f29-python


See https://www.python.org/dev/peps/pep-0479/

(Will reassign to meson in next step.)