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Fix unused variable compilation error #4041

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Fix unused variable compilation error #4041

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2 changes: 1 addition & 1 deletion demos/demo_sift1M.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ float* fvecs_read(const char* fname, size_t* d_out, size_t* n_out) {
*d_out = d;
*n_out = n;
float* x = new float[n * (d + 1)];
size_t nr = fread(x, sizeof(float), n * (d + 1), f);
size_t nr __attribute__((unused)) = fread(x, sizeof(float), n * (d + 1), f);
assert(nr == n * (d + 1) || !"could not read whole file");

// shift array to remove row headers
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