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Fix Issue 23170 - Array literal passed to map in lambda, then returne… #14193

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merged 1 commit into from
Jun 8, 2022

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dkorpel
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@dkorpel dkorpel commented Jun 7, 2022

…d from nested function, is memory corrupted

This issue is already fixed in master by #14089, but @ibuclaw suggested backporting it to stable. Specifically, this part:

dmd/src/dmd/expressionsem.d

Lines 2050 to 2054 in 15d8805

// Turning heap allocations into stack allocations is dangerous without dip1000, since `scope` inference
// may be unreliable when scope violations only manifest as deprecation warnings.
// However, existing `@nogc` code may rely on it, so still do it when the parameter is explicitly marked `scope`
const explicitScope = (p.storageClass & STC.lazy_) ||
((p.storageClass & STC.scope_) && !(p.storageClass & STC.scopeinferred));

@dkorpel dkorpel added the dip1000 memory safety with scope, ref, return label Jun 7, 2022
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Thanks for your pull request and interest in making D better, @dkorpel! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

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Auto-close Bugzilla Severity Description
23170 regression Array literal passed to map in lambda, then returned from nested function, is memory corrupted

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + dmd#14193"

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ibuclaw commented Jun 7, 2022

Many thanks for this @dkorpel!

@dkorpel dkorpel marked this pull request as ready for review June 7, 2022 20:57
@RazvanN7 RazvanN7 merged commit 954e5b6 into dlang:stable Jun 8, 2022
@ibuclaw ibuclaw mentioned this pull request Jul 9, 2022
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4 participants