Re: Mathematica 9: bug in merging cells
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- Subject: [mg128964] Re: Mathematica 9: bug in merging cells
- From: David Reiss <dbreiss at gmail.com>
- Date: Thu, 6 Dec 2012 04:56:12 -0500 (EST)
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I reported the bug. On Dec 5, 3:11 am, Rafapa <raf... at simulux.us.es> wrote: > On Tuesday, December 4, 2012 10:09:37 AM UTC+1, Fred Simons wrote: > > When writing a larger program, I usually test the single steps in > > > separate cells, then merge these cells and localize the variables by > > > wrapping the contents of the merged cells in a Module. By doing so in > > > Mathematica 9, due to a bug in merging cells, I lost a lot of code. I > > > reported this bug to WRI two weeks ago. It is not yet repaired in the > > > new release, so I thought I would mention this annoying bug here as well. > > > This is an example (Mathematica 9 for Windows, I am not aware if this > > > happens for other systems too). > > > Construct two input cells, the first one containing > > > a=1; > > > (* comment *) > > > b=2; > > > and the second one > > > c=3; > > > When merging these two cells the contents ending with the comment is > > > shown in an orange rectangle, with the error message that there is a > > > RowBox with an invalid first argument. I cannot see any reason why this > > > merging of cells could not be undone with ctrl-Z, but it cannot and > > > therefore part of my code was gone. > > > In this simple example I could see how to fix it. Toggle ctrl-E for > > > seeing the box structure. Place a } just behind the RowBox with the > > > comment and a { behind the very first RowBox[, that is followed on the > > > next line with another RowBox. > > > During writing this message, I found that the same happens when you try > > > to copy and paste the first cell. > > > Fred Simons > > > Eindhoven University of Technology > > Same problem with Mathematica 9.0.0 under Linux x86 (64 bit). > > Rafael R. Pappalardo > Univ. of Seville (Spain)