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type system allows setting a non-optional pointer to null via only implicit casts #1102

andrewrk opened this Issue Jun 12, 2018 · 0 comments


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andrewrk commented Jun 12, 2018

after 6edd811 this is possible:

test "oaeu" {
    var x: i32 = 1234;
    var p: *i32 = &x;
    var pp: *?*i32 = &p;
    pp.* = null;
    var y = p.*;

it segfaults using only implicit casts, which shouldn't be possible.

runtime-assignable casting (e.g. const, volatile, and equivalent) for optional pointers should be disallowed for mutable pointer parent types. Then var pp: *?*i32 = &p; would be a compile error.

@andrewrk andrewrk added the bug label Jun 12, 2018

@andrewrk andrewrk added this to the 0.3.0 milestone Jun 12, 2018

@andrewrk andrewrk closed this in 8dd2479 Jun 13, 2018

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