The code speak for itself ``` A = ones(2,2) v = [1.0; 2.0] A * v # [3.0; 3.0] A * v[2:-1:1] # [3.0; 3.0] A * view(v, 2:-1:1) # [2.0; 2.0] ???? ``` Version info: ``` Julia Version 1.0.3 Commit 099e826241 (2018-12-18 01:34 UTC) Platform Info: OS: Linux (x86_64-pc-linux-gnu) CPU: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.0 (ORCJIT, skylake) ``` and also with 1.1.0-rc2 ``` Julia Version 1.1.0-rc2.0 Commit 980eda064e (2019-01-13 00:19 UTC) ``` First posted in [discourse](https://discourse.julialang.org/t/bug-in-matrix-times-subarray-with-decreasing-index/19802).