I've hit it too early. Here is the actual report: pythran 0.9.3 or 0.9.3post1 is not compatible yet with gast 0.3.x The failure visible during the docs build: + make -C docs html make: Entering directory '/builddir/build/BUILD/pythran-0.9.3post1/docs' sphinx-build -b html -d _build/doctrees . _build/html Running Sphinx v2.1.2 Configuration error: There is a programmable error in your configuration file: Traceback (most recent call last): File "/usr/lib/python3.8/site-packages/sphinx/config.py", line 361, in eval_config_file execfile_(filename, namespace) File "/usr/lib/python3.8/site-packages/sphinx/util/pycompat.py", line 86, in execfile_ exec(code, _globals) File "/builddir/build/BUILD/pythran-0.9.3post1/docs/conf.py", line 19, in <module> from pythran import __version__ File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/__init__.py", line 40, in <module> from pythran.toolchain import (generate_cxx, compile_cxxfile, compile_cxxcode, File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/toolchain.py", line 6, in <module> from pythran.backend import Cxx, Python File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/backend.py", line 8, in <module> from pythran.analyses import LocalNodeDeclarations, GlobalDeclarations, Scope File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/analyses/__init__.py", line 12, in <module> from .aliases import Aliases, StrictAliases File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/analyses/aliases.py", line 6, in <module> from pythran.syntax import PythranSyntaxError File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/syntax.py", line 7, in <module> from pythran.tables import MODULES File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/tables.py", line 173, in <module> BINARY_UFUNC = {"accumulate": FunctionIntr()} File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/intrinsic.py", line 94, in __init__ super(FunctionIntr, self).__init__(**kwargs) File "/builddir/build/BUILD/pythran-0.9.3post1/build/lib/pythran/intrinsic.py", line 55, in __init__ self.args = ast.arguments( File "/usr/lib/python3.8/site-packages/gast/gast.py", line 17, in create_node assert nbparam in (0, len(Fields)), \ AssertionError: Bad argument number for arguments: 6, expecting 7 make: Leaving directory '/builddir/build/BUILD/pythran-0.9.3post1/docs' make: *** [Makefile:7: html] Error 2
0.9.4 has been released yesterday, it should fix this issue.