Solving Multiple Rows containing Unnamed Equations

[alexander.hartl]

Though solving multiple rows containing named equations seems to be working fine, solving multiple rows of unnamed equations is not. Example:

• Open CAS view,
• Enter "3 * x + 4 * y = 7" into the first row,
• Evaluate,
• Enter "x - 3 * y = 3" into the second row,
• Evaluate,
• Select the first two rows,
• Click the solve tool.

The above yields "{$1, $2}" in the third row, which in turn yields "Sorry, something went wrong. Please check your input".

Naming the equation in the first row a and the equation in second row b the solve tool yields "{a, b}" in the third row, which in turn is solved correctly.

Also see ticket #1556.

This ticket replaces ticket #343.

[dominik.kreil]

I think something went wrong during the parsing.
The MPReduce string looks:

MPReduce: <<keepinput!!:=0$ numeric!!:=0$ precision 30$ print_precision 16$ off complex, rounded, numval, factor, div, combinelogs, expandlogs, pri$ currentx!!:= ggbcasvar1x; currenty!!:= ggbcasvar1y;<< begin scalar equations!!; equations!!:=(listofliststomat(list(ggbcasvar1$1, ggbcasvar1$2))); if arglength(equations!!)>-1 and part(equations!!,0)='list then equations!!:=mkdepthone(equations!!); return flattenlist(mysolve(aeval(equations!!),listofliststomat(list(ggbcasvar1x, ggbcasvar1y)))) end >>>>

also the validexpression tree looks quite strange.
The same thing happend when i type the solve command by hand like

Solve[{$1, $2},{x,y}]

for 1,2 were the linenumbers of the two equations