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don't segfault if MagickGetImageBlob returns null

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This commit is contained in:
BeatButton
2023-04-07 10:17:57 -06:00
parent 1cfbc83471
commit c8fdace590
1 changed files with 11 additions and 7 deletions
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4
src/wand/magick.rs
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@ -831,6 +831,9 @@ impl MagickWand {
bindings::MagickSetImageFormat(self.wand, c_format.as_ptr()); bindings::MagickSetImageFormat(self.wand, c_format.as_ptr());
bindings::MagickGetImageBlob(self.wand, &mut length) bindings::MagickGetImageBlob(self.wand, &mut length)
}; };
if blob.is_null() {
Err(MagickError("failed to write image blob"))
} else {
let mut bytes = Vec::with_capacity(length as usize); let mut bytes = Vec::with_capacity(length as usize);
unsafe { unsafe {
bytes.set_len(length as usize); bytes.set_len(length as usize);
@ -839,6 +842,7 @@ impl MagickWand {
}; };
Ok(bytes) Ok(bytes)
} }
}
/// Write the images in the desired format to a new blob. /// Write the images in the desired format to a new blob.
/// ///