unsafe access to dlist range after clear #9

ikod · 2019-08-13T18:17:50Z

https://forum.dlang.org/post/qiurcv$1smi$1@digitalmars.com

They don't seem to actually be @safe. An example:

import cachetools.containers.lists;
import std.stdio;
void main() @safe
{
DList!int dl;
dl.insert_first(42);
auto r = dl.range;
dl.clear();
writeln(r.front); /* Prints garbage, because it's accessing freed memory. */
}

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unsafe access to dlist range after clear #9

unsafe access to dlist range after clear #9

ikod commented Aug 13, 2019

import cachetools.containers.lists;
import std.stdio;
void main() @safe
{
DList!int dl;
dl.insert_first(42);
auto r = dl.range;
dl.clear();
writeln(r.front); /* Prints garbage, because it's accessing `free`d memory. */
}

unsafe access to dlist range after clear #9

unsafe access to dlist range after clear #9

Comments

ikod commented Aug 13, 2019

import cachetools.containers.lists; import std.stdio; void main() @safe { DList!int dl; dl.insert_first(42); auto r = dl.range; dl.clear(); writeln(r.front); /* Prints garbage, because it's accessing freed memory. */ }

import cachetools.containers.lists;
import std.stdio;
void main() @safe
{
DList!int dl;
dl.insert_first(42);
auto r = dl.range;
dl.clear();
writeln(r.front); /* Prints garbage, because it's accessing `free`d memory. */
}