Fix bug #11854

The code was checking only for particular vertical alignment requests
in order to decide to nest a standard array into a 1x1 ams matrix.
However, also vertical lines are not possible in ams matrices.

diff --git a/src/frontends/qt/GuiMathMatrix.cpp b/src/frontends/qt/GuiMathMatrix.cpp
index b7719319d8be44d59a6e2538761e3329a1727931..92ba6fc09cfe8fe2b8a3e9eea5befb8b46dcdff8 100644 (file)
--- a/src/frontends/qt/GuiMathMatrix.cpp
+++ b/src/frontends/qt/GuiMathMatrix.cpp
@@ -144,7 +144,7 @@ void GuiMathMatrix::slotOK()
        int const ny = rowsSB->value();
        // a matrix without a decoration is an array,
        // otherwise it is an AMS matrix
-       // decorated matrices cannot have a vertical alignment
+       // decorated matrices cannot have a vertical alignment or line
 
        char const c = v_align_c[valignCO->currentIndex()];
        QString const sh = halignED->text();
@@ -154,9 +154,10 @@ void GuiMathMatrix::slotOK()
        if (decorationCO->currentIndex() != 0) {
                int const deco = decorationCO->currentIndex();
                QString deco_name = DecoNames[deco - 1];
-               // only if a special alignment is set create a 1x1 AMS array in which
-               // a normal array will be created, otherwise create just a normal AMS array
-               if (sh.contains('l') || sh.contains('r')) {
+               // if a vertical line or a special alignment is requested,
+               // create a 1x1 AMS matrix containing a normal array,
+               // otherwise create just a standard AMS matrix
+               if (sh.contains('l') || sh.contains('r') || sh.contains('|')) {
                        string const str_ams = fromqstr(
                                QString("%1 %2 %3").arg(int(1)).arg(int(1)).arg(deco_name));
                        dispatch(FuncRequest(LFUN_MATH_AMS_MATRIX, str_ams));