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bpo-37947: Avoid double-decrement in symtable recursion counting #15593

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Merged
ncoghlan merged 3 commits into from
Aug 29, 2019
Merged

bpo-37947: Avoid double-decrement in symtable recursion counting #15593

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eb863e1
bpo-37947: Avoid double-decrement in symtable recursion counting
ncoghlan Aug 29, 2019
b4a341e
Ensure the symtable recursion accounting balances
ncoghlan Aug 29, 2019
6e83dc2
Remove spurious line
ncoghlan Aug 29, 2019
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6 changes: 3 additions & 3 deletions Python/symtable.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1501,16 +1501,16 @@ symtable_handle_namedexpr(struct symtable *st, expr_ty e)
PyErr_SyntaxLocationObject(st->st_filename,
e->lineno,
e->col_offset);
VISIT_QUIT(st, 0);
return 0;
}
if (st->st_cur->ste_comprehension) {
/* Inside a comprehension body, so find the right target scope */
if (!symtable_extend_namedexpr_scope(st, e->v.NamedExpr.target))
VISIT_QUIT(st, 0);
return 0;
}
VISIT(st, expr, e->v.NamedExpr.value);
VISIT(st, expr, e->v.NamedExpr.target);
VISIT_QUIT(st, 1);
return 1;
}

static int
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