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src: do not make Resize(0)’d buffers base nullptr #26731

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This fixes issues in which APIs that accept pointers created this way
treat nullptr and a zero-length buffer differently.
We already do something similar for our Malloc() implementation.

Fixes: #26514

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

This fixes issues in which APIs that accept pointers created this way
treat `nullptr` and a zero-length buffer differently.
We already do something similar for our `Malloc()` implementation.

Fixes: nodejs#26514
@nodejs-github-bot nodejs-github-bot added the c++ Issues and PRs that require attention from people who are familiar with C++. label Mar 18, 2019
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@mhdawson mhdawson left a comment

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LGTM

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@addaleax addaleax added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Mar 21, 2019
BridgeAR pushed a commit to BridgeAR/node that referenced this pull request Mar 21, 2019
This fixes issues in which APIs that accept pointers created this way
treat `nullptr` and a zero-length buffer differently.
We already do something similar for our `Malloc()` implementation.

PR-URL: nodejs#26731
Fixes: nodejs#26514
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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Landed in d117e41 🎉

@BridgeAR BridgeAR closed this Mar 21, 2019
targos pushed a commit to targos/node that referenced this pull request Mar 27, 2019
This fixes issues in which APIs that accept pointers created this way
treat `nullptr` and a zero-length buffer differently.
We already do something similar for our `Malloc()` implementation.

PR-URL: nodejs#26731
Fixes: nodejs#26514
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
targos pushed a commit that referenced this pull request Mar 27, 2019
This fixes issues in which APIs that accept pointers created this way
treat `nullptr` and a zero-length buffer differently.
We already do something similar for our `Malloc()` implementation.

PR-URL: #26731
Fixes: #26514
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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napi_get_buffer_info(): change of behavior in v11.11.0
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