formula/source/core/api/token.cxx |   13 +++++--------
 sc/source/core/tool/interpr4.cxx  |   10 +++++++++-
 2 files changed, 14 insertions(+), 9 deletions(-)

New commits:
commit e7ce9bddadb2db222eaa5f594ef1de2e36d57e5c
Author:     Eike Rathke <er...@redhat.com>
AuthorDate: Thu Feb 16 20:20:31 2023 +0100
Commit:     Eike Rathke <er...@redhat.com>
CommitDate: Fri Feb 17 02:24:08 2023 +0000

    Obtain actual 0-parameter count for OR(), AND() and 1-parameter functions
    
    OR and AND for legacy infix notation are classified as binary
    operators but in fact are functions with parameter count. In case
    no argument is supplied, GetByte() returns 0 and for that case the
    implicit binary operator 2 parameters were wrongly assumed.
    Similar for functions expecting 1 parameter, without argument 1
    was assumed. For "real" unary and binary operators the compiler
    already checks parameters. Omit OR and AND and 1-parameter
    functions from this implicit assumption and return the actual 0
    count.
    
    Change-Id: Ie05398c112a98021ac2875cf7b6de994aee9d882
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147173
    Reviewed-by: Eike Rathke <er...@redhat.com>
    Tested-by: Jenkins

diff --git a/formula/source/core/api/token.cxx 
b/formula/source/core/api/token.cxx
index ca7b7bab3d58..74a212937bb0 100644
--- a/formula/source/core/api/token.cxx
+++ b/formula/source/core/api/token.cxx
@@ -94,17 +94,14 @@ sal_uInt8 FormulaToken::GetParamCount() const
         return 0;       // parameters and specials
                         // ocIf... jump commands not for FAP, have cByte then
 //2do: bool parameter whether FAP or not?
-    else if ( GetByte() )
+    else if (GetByte())
         return GetByte();   // all functions, also ocExternal and ocMacro
-    else if (SC_OPCODE_START_BIN_OP <= eOp && eOp < SC_OPCODE_STOP_BIN_OP)
-        return 2;           // binary
-    else if ((SC_OPCODE_START_UN_OP <= eOp && eOp < SC_OPCODE_STOP_UN_OP)
-            || eOp == ocPercentSign)
-        return 1;           // unary
+    else if (SC_OPCODE_START_BIN_OP <= eOp && eOp < SC_OPCODE_STOP_BIN_OP && 
eOp != ocAnd && eOp != ocOr)
+        return 2;           // binary operators, compiler checked; OR and AND 
legacy but are functions
+    else if ((SC_OPCODE_START_UN_OP <= eOp && eOp < SC_OPCODE_STOP_UN_OP) || 
eOp == ocPercentSign)
+        return 1;           // unary operators, compiler checked
     else if (SC_OPCODE_START_NO_PAR <= eOp && eOp < SC_OPCODE_STOP_NO_PAR)
         return 0;           // no parameter
-    else if (SC_OPCODE_START_1_PAR <= eOp && eOp < SC_OPCODE_STOP_1_PAR)
-        return 1;           // one parameter
     else if (FormulaCompiler::IsOpCodeJumpCommand( eOp ))
         return 1;           // only the condition counts as parameter
     else
diff --git a/sc/source/core/tool/interpr4.cxx b/sc/source/core/tool/interpr4.cxx
index b122a836d654..1f14981ebadc 100644
--- a/sc/source/core/tool/interpr4.cxx
+++ b/sc/source/core/tool/interpr4.cxx
@@ -4034,7 +4034,15 @@ StackVar ScInterpreter::Interpret()
                 else if (sp >= pCur->GetParamCount())
                     nStackBase = sp - pCur->GetParamCount();
                 else
-                    nStackBase = sp;    // underflow?!?
+                {
+                    SAL_WARN("sc.core", "Stack anomaly at " << aPos.Format(
+                                ScRefFlags::VALID | ScRefFlags::FORCE_DOC | 
ScRefFlags::TAB_3D, &mrDoc)
+                            << "  eOp: " << static_cast<int>(eOp)
+                            << "  params: " << 
static_cast<int>(pCur->GetParamCount())
+                            << "  nStackBase: " << nStackBase << "  sp: " << 
sp);
+                    nStackBase = sp;
+                    assert(!"underflow");
+                }
             }
 
             switch( eOp )

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