diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index 5f28c3bf9..6aada3aaf 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -3377,9 +3377,10 @@ void G_SetCrosshairColor(int32_t r, int32_t g, int32_t b)
     invalidatetile(CROSSHAIR, -1, -1);
 }
 
-static inline size_t G_LastMapInfoIndex(void)
+static inline int G_LastMapInfoIndex(void)
 {
-    return ud.volume_number*MAXLEVELS + ud.last_level - 1;
+    Bassert(ud.last_level >= 1);  // NOTE: last_level is 1-based
+    return ud.volume_number*MAXLEVELS + ud.last_level-1;
 }
 
 #define SCORESHEETOFFSET -20
@@ -12502,10 +12503,14 @@ const char* G_PrintYourTime(void)
 }
 const char* G_PrintParTime(void)
 {
+    if (ud.last_level < 1)
+        return "<invalid>";
     return G_PrintTime2(MapInfo[G_LastMapInfoIndex()].partime);
 }
 const char* G_PrintDesignerTime(void)
 {
+    if (ud.last_level < 1)
+        return "<invalid>";
     return G_PrintTime2(MapInfo[G_LastMapInfoIndex()].designertime);
 }
 const char* G_PrintBestTime(void)
diff --git a/polymer/eduke32/source/lunatic/con_lang.lua b/polymer/eduke32/source/lunatic/con_lang.lua
index 2da6dd438..f1077339e 100644
--- a/polymer/eduke32/source/lunatic/con_lang.lua
+++ b/polymer/eduke32/source/lunatic/con_lang.lua
@@ -861,7 +861,7 @@ local UserdefLabels = {
     fta_on = UD".fta_on",
     god = UDRO".god",
     idplayers = UDRO".idplayers",
-    last_level = UDRO".lastlevel",
+    last_level = UDRO".last_level",
     level_number = { UD".level_number", UD":set_level_number(%%s)", {0, MAXLEVELS-1} },
     levelstats = UD".levelstats",
     lockout = UDRO".lockout",
diff --git a/polymer/eduke32/source/lunatic/control.lua b/polymer/eduke32/source/lunatic/control.lua
index 9497f36d4..b305ef9d6 100644
--- a/polymer/eduke32/source/lunatic/control.lua
+++ b/polymer/eduke32/source/lunatic/control.lua
@@ -939,13 +939,13 @@ function _qgetsysstr(qdst, what, pli)
         bcheck.volume_idx(vol)
         ffi.copy(dst, ffiC.EpisodeNames[vol], ffi.sizeof(ffiC.EpisodeNames[0]))
     elseif (what == ffiC.STR_YOURTIME) then
-        ffi.copy(dst, ffiC.G_PrintYourTime())
+        ffi.copy(dst, ffi.string(ffiC.G_PrintYourTime()))
     elseif (what == ffiC.STR_PARTIME) then
-        ffi.copy(dst, ffiC.G_PrintParTime())
+        ffi.copy(dst, ffi.string(ffiC.G_PrintParTime()))
     elseif (what == ffiC.STR_DESIGNERTIME) then
-        ffi.copy(dst, ffiC.G_PrintDesignerTime())
+        ffi.copy(dst, ffi.string(ffiC.G_PrintDesignerTime()))
     elseif (what == ffiC.STR_BESTTIME) then
-        ffi.copy(dst, ffiC.G_PrintBestTime())
+        ffi.copy(dst, ffi.string(ffiC.G_PrintBestTime()))
     else
         error("unknown system string ID "..what, 2)
     end
diff --git a/polymer/eduke32/source/lunatic/defs.ilua b/polymer/eduke32/source/lunatic/defs.ilua
index 1aa1454a2..9d3b397e9 100644
--- a/polymer/eduke32/source/lunatic/defs.ilua
+++ b/polymer/eduke32/source/lunatic/defs.ilua
@@ -720,6 +720,10 @@ vec2_t G_ScreenTextSize(const int32_t font,
                         int32_t xspace, int32_t yline, int32_t xbetween, int32_t ybetween,
                         const int32_t f,
                         int32_t x1, int32_t y1, int32_t x2, int32_t y2);
+const char* G_PrintYourTime(void);
+const char* G_PrintParTime(void);
+const char* G_PrintDesignerTime(void);
+const char* G_PrintBestTime(void);
 
 void G_UpdateScreenArea(void);
 void G_SaveMapState(void);
diff --git a/polymer/eduke32/source/lunatic/dynsymlist b/polymer/eduke32/source/lunatic/dynsymlist
index eb5e7ed3f..7ef619ad9 100644
--- a/polymer/eduke32/source/lunatic/dynsymlist
+++ b/polymer/eduke32/source/lunatic/dynsymlist
@@ -238,6 +238,10 @@ G_DrawTXDigiNumZ;
 G_PrintGameText;
 G_ScreenText;
 G_ScreenTextSize;
+G_PrintYourTime;
+G_PrintParTime;
+G_PrintDesignerTime;
+G_PrintBestTime;
 
 G_UpdateScreenArea;
 G_SaveMapState;
diff --git a/polymer/eduke32/source/lunatic/test/qgetsysstr.con b/polymer/eduke32/source/lunatic/test/qgetsysstr.con
index 6704af483..e63faf9d6 100644
--- a/polymer/eduke32/source/lunatic/test/qgetsysstr.con
+++ b/polymer/eduke32/source/lunatic/test/qgetsysstr.con
@@ -10,17 +10,43 @@ gamevar badlev_oob 999 0
 gamevar badvol_nd 3 0
 gamevar badlev_nd 32 0
 
-definequote 255 <temp>
+define Q_tmp 255
+definequote Q_tmp <temp>
+define Q_tmp2 256
+definequote Q_tmp2 <temp>
+
+define Q_last_level 1000
+definequote Q_last_level Last level (1-based): %d
+define Q_dtime 1001
+definequote Q_dtime Designer time for last level: %s
+
+state print_designer_time
+    // This must not invoke an oob access on the C side if ud.last_level < 0!
+    qgetsysstr Q_tmp2 STR_DESIGNERTIME
+
+    qsprintf Q_tmp Q_dtime Q_tmp2
+    userquote Q_tmp
+ends
+
+onevent EVENT_NEWGAME
+    getuserdef .last_level lev
+    qsprintf Q_tmp Q_last_level lev
+    userquote Q_tmp
+
+    state print_designer_time
+endevent
 
 onevent EVENT_ENTERLEVEL
+    state print_designer_time
+
     // must fail, since the current player is -1 in this event
-    qgetsysstr 255 STR_PLAYERNAME
+    qgetsysstr Q_tmp STR_PLAYERNAME
 endevent
 
 onevent EVENT_USESTEROIDS
     getuserdef .volume_number vol
     setuserdef .volume_number badvol_oob  // LunaCON errors here
-    qgetsysstr 255 STR_VOLUMENAME  // C-CON errors here
+    qgetsysstr Q_tmp STR_VOLUMENAME  // C-CON errors here
     setuserdef .volume_number vol
 endevent
 
@@ -30,7 +56,7 @@ onevent EVENT_USEJETPACK
 
     setuserdef .volume_number badvol_oob  // LunaCON errors here
     setuserdef .level_number badlev_oob
-    qgetsysstr 255 STR_MAPNAME  // C-CON errors here
+    qgetsysstr Q_tmp STR_MAPNAME  // C-CON errors here
 
     setuserdef .volume_number vol
     setuserdef .level_number lev
@@ -42,7 +68,7 @@ onevent EVENT_JUMP
 
     setuserdef .volume_number badvol_nd
     setuserdef .level_number badlev_nd
-    qgetsysstr 255 STR_MAPFILENAME  // LunaCON, C-CON error here
+    qgetsysstr Q_tmp STR_MAPFILENAME  // LunaCON, C-CON error here
 
     setuserdef .volume_number vol
     setuserdef .level_number lev
diff --git a/polymer/eduke32/source/lunatic/test/quote_ops.con b/polymer/eduke32/source/lunatic/test/quote_ops.con
index f4ca93297..0520e2af8 100644
--- a/polymer/eduke32/source/lunatic/test/quote_ops.con
+++ b/polymer/eduke32/source/lunatic/test/quote_ops.con
@@ -36,7 +36,7 @@ onevent EVENT_ENTERLEVEL
 
     redefinequote 117 %s -- %d -- %s -- %d slen=%d
     // test:
-    // - same destination quote as on of the source quotes under %s conversion
+    // - same destination quote as one of the source quotes under %s conversion
     qsprintf 116 /*<-*/ 117 /*args:*/ 116 9999 116 5555 slen
     userquote 116  // "012345678|012345678| -- 9999 -- 012345678|012345678| -- 5555 slen=10"