[Debian-med-packaging] Bug#1132377: libvbz-hdf-plugin: Fix build error for loong64

[John Paul Adrian Glaubitz]

Control: retitle -1 libvbz-hdf-plugin: Fix FTBFS on loong64
Control: tags -1 +ftbfs

On Tue, 2026-03-31 at 15:29 +0800, zhangdandan wrote:
> Compiling the libvbz-hdf-plugin failed for loong64 in the Debian Package 
> Auto-Building environment.
> The error log is as follows,
> ```
> [ 33%] Built target hdf_test_utils
> In file included from 
> /build/reproducible-path/libvbz-hdf-plugin-1.0.2/vbz/v0/vbz_streamvbyte.cpp:2:
> In static member function ‘static std::vector<U> StreamVByteWorkerV0<T, 
> UseZigZag>::cast(const gsl::span<V>&) [with U = int; V = const int; T = 
> int; bool UseZigZag = true]’,
>      inlined from ‘static vbz_size_t StreamVByteWorkerV0<T, 
> UseZigZag>::compress(gsl::span<const char>, gsl::span<char>) [with T = 
> int; bool UseZigZag = true]’ at 
> /build/reproducible-path/libvbz-hdf-plugin-1.0.2/vbz/v0/vbz_streamvbyte_impl.h:30:35,
>      inlined from ‘vbz_size_t 
> vbz_delta_zig_zag_streamvbyte_compress_v0(const void*, vbz_size_t, 
> void*, vbz_size_t, int, bool)’ at 
> /build/reproducible-path/libvbz-hdf-plugin-1.0.2/vbz/v0/vbz_streamvbyte.cpp:54:73:
> /build/reproducible-path/libvbz-hdf-plugin-1.0.2/vbz/v0/vbz_streamvbyte_impl.h:75:23: 
> error: ‘void* __builtin_memcpy(void*, const void*, long unsigned int)’ 
> offset [0, 3] is out of the bounds [0, 0] [-Werror=array-bounds=]
>     75 |             output[i] = input[i];
> ```
> 
> Please consider the patch attached.
> I have built libvbz-hdf-plugin normally on locally.

This looks like more than a workaround than an actual fix as it just suppresses a warning.
Is it known why this warning shows on loong64 only?

Adrian

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