Add data files and then delete other entries, abnormal data will appear in the zip archive.

[lindyer]

/*read zip file to buffer */
auto za = ZipArchive::fromWritableBuffer(buffer, buffer_size, ZipArchive::Write);
/* read file1 to buf */
za.addData("path/to/file1", file1_buffer, file2_buffer_size, true);
za.deleteEntry("path/to/file2");
za.close(); 
/* write buffer to zip file */
/* when decompressing with 7z, it prompts "Invalid data besides valid data" */

[ctabin]

Hi @lindyer,

Maybe something related to fromWritableBuffer ? 🤔 Is it working if you use a regular file instead of a memory zip ?

[ctabin]

Maybe I found out something strange while working on #233... libzip seems to read the invalid data after adding empty entries after a file and that might be the same problem encountered by this issue.

At this point, I'm not sure it is a libzippp issue or an upstream one... I wasn't able to reproduce it on my computer (g++ 14) but it systematically failed on Travis CI (g++ 9).