diff --git a/poppler/SplashOutputDev.cc b/poppler/SplashOutputDev.cc
index 9e07060..a8da82a 100644
--- a/poppler/SplashOutputDev.cc
+++ b/poppler/SplashOutputDev.cc
@@ -2282,6 +2282,14 @@ GBool SplashOutputDev::beginType3Char(GfxState *state, double x, double y,
 
       // create new entry in the font cache
       if (nT3Fonts == splashOutT3FontCacheSize) {
+        t3gs = t3GlyphStack;
+        while (t3gs != NULL) {
+          if (t3gs->cache == t3FontCache[nT3Fonts - 1]) {
+            error(errSyntaxWarning, -1, "t3FontCache reaches limit but font still on stack in SplashOutputDev::beginType3Char");
+            return gTrue;
+          }
+          t3gs = t3gs->next;
+        }
 	delete t3FontCache[nT3Fonts - 1];
 	--nT3Fonts;
       }