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bpo-39220: Do not optimise annotation if 'from __future__ import annotations' is used (GH-17866)

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Do not apply AST-based optimizations if 'from __future__ import annotations' is used in order to
prevent information lost in the final version of the annotations.
This commit is contained in:
Pablo Galindo 2020-03-18 23:02:09 +00:00 • committed by GitHub
parent 8849e5962b
commit d112c600ab
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5 changed files with 67 additions and 40 deletions
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6
Python/compile.c
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@ -354,7 +354,11 @@ PyAST_CompileObject(mod_ty mod, PyObject *filename, PyCompilerFlags *flags,
c.c_nestlevel = 0;
c.c_do_not_emit_bytecode = 0;
if (!_PyAST_Optimize(mod, arena, c.c_optimize)) {
_PyASTOptimizeState state;
state.optimize = c.c_optimize;
state.ff_features = merged;
if (!_PyAST_Optimize(mod, arena, &state)) {
goto finally;
}