On Monday, May 23, 2016 at 9:22:35 AM UTC-7, Guillaume Holler wrote: > > I don't know if this is the right place to submit bugs. >
It's a reasonable place to start. > I have consistently reproduced the following bug: > I have tried and was unable to reproduce your results on 7.2. Can you give the *exact* input you're giving and the *exact* exception you're getting back? (you can cull some of the traceback) > > Here is an example code snipet: > > F.<r2,r3> = NumberField([x^2 - 2, x^2 - 3]) > > M = Matrix(F, 8, 8) > > block = Matrix(F, [ [r2, r3 ] ]) > M.set_block(2, 2, block)) > I get a syntax error on that last instruction for a mismatched ")". If I remove the extra ")" it works fine. > M = Matrix(F, 8, 8) > > block = Matrix(F, [ [r2, r3 ] ]) > M.set_block(2, 2, block)) > > # KO this time > I assume with "KO" you mean "I get an error". For me this works once I fix the ")". > > After some investigation with the help of SageMathCell, it seems that at > some point > the test: > > M.parent().base_ring() is block.parent().base_ring() > > This makes me think in the code you actually ran (the code you pasted in is not what you ran, because it has a syntax error in it and you would have noticed that) might have redefined the field F somewhere between the definition of M and of "block", so that they have base rings that are isomorphic, but sage doesn't know a canonical isomorphism between them. Just so it's clear what I've tested: sage: F.<r2,r3> = NumberField([x^2 - 2, x^2 - 3]) sage: M = Matrix(F, 8, 8) sage: block = Matrix(F, [ [r2, r3 ] ]) sage: M.set_block(2, 2, block) sage: M = Matrix(F, 8, 8) sage: block = Matrix(F, [ [r2, r3 ] ]) sage: M.set_block(2, 2, block) produces no error for me -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
