taichi's sparse linear solver produces wrong result

[liuyunpu]

taichi sparse linear solver produces wrong result when solving the same sparse matrix compared with matlab. this is the plot of the matrix this is the result comparision. clearly taichi solver's results are far from useable. the matrix i use are attached in the txt file A.txt b.txt

[liuyunpu]

I am using 1.7.0 taichi, but the problem can also be reproduced in 1.6.0

[liuyunpu]

Hope this can be fixed soon! Transferring array to scipy from taichi is really slow