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Issue #24098: Fixed possible crash when AST is changed in process of

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compiling it.
This commit is contained in:
Serhiy Storchaka 2016-10-07 21:51:28 +03:00
parent 36e7e97d62
commit cf3806026b
3 changed files with 226 additions and 0 deletions
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7
Parser/asdl_c.py
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@ -526,6 +526,13 @@ class Obj2ModVisitor(PickleVisitor):
self.emit("res = obj2ast_%s(PyList_GET_ITEM(tmp, i), &value, arena);" %
field.type, depth+2, reflow=False)
self.emit("if (res != 0) goto failed;", depth+2)
self.emit("if (len != PyList_GET_SIZE(tmp)) {", depth+2)
self.emit("PyErr_SetString(PyExc_RuntimeError, \"%s field \\\"%s\\\" "
"changed size during iteration\");" %
(name, field.name),
depth+3, reflow=False)
self.emit("goto failed;", depth+3)
self.emit("}", depth+2)
self.emit("asdl_seq_SET(%s, i, value);" % field.name, depth+2)
self.emit("}", depth+1)
else: