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Fix memory leak with bad generator expression

This commit is contained in:
Neal Norwitz 2005-11-14 00:18:03 +00:00
parent 7b3d5e1779
commit e8c0536d57
1 changed files with 10 additions and 3 deletions
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13
Python/ast.c
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@ -1901,6 +1901,7 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
if (!expr1)
return NULL;
if (expr1->kind == GeneratorExp_kind) {
free_expr(expr1);
ast_error(ch, "augmented assignment to generator "
"expression not possible");
return NULL;
@ -1908,6 +1909,7 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
if (expr1->kind == Name_kind) {
char *var_name = PyString_AS_STRING(expr1->v.Name.id);
if (var_name[0] == 'N' && !strcmp(var_name, "None")) {
free_expr(expr1);
ast_error(ch, "assignment to None");
return NULL;
}
@ -1918,12 +1920,17 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
expr2 = ast_for_testlist(c, ch);
else
expr2 = Yield(ast_for_expr(c, ch), LINENO(ch));
if (!expr2)
if (!expr2) {
free_expr(expr1);
return NULL;
}
operator = ast_for_augassign(CHILD(n, 1));
if (!operator)
if (!operator) {
free_expr(expr1);
free_expr(expr2);
return NULL;
}
return AugAssign(expr1, operator, expr2, LINENO(n));
}
@ -1964,7 +1971,7 @@ ast_for_expr_stmt(struct compiling *c, const node *n)
else
expression = ast_for_expr(c, value);
if (!expression)
return NULL;
goto error;
return Assign(targets, expression, LINENO(n));
error:
for (i = i / 2; i >= 0; i--)