patches from 148190 #22

asm/src/org/aspectj/asm/AsmManager.java

     }
 
     private String genExternFilePath(String configFilePath) {
-        return configFilePath.substring(0, configFilePath.lastIndexOf(".lst")) + ".ajsym";
+    	// sometimes don't have ".lst"
+    	if (configFilePath.lastIndexOf(".lst") != -1) {
+			configFilePath = configFilePath.substring(0,configFilePath.lastIndexOf(".lst"));
+		}
+        return configFilePath + ".ajsym";
     }
     
 //	public void setShouldSaveModel(boolean shouldSaveModel) {

asm/src/org/aspectj/asm/internal/JDTLikeHandleProvider.java

 			String configFile = AsmManager.getDefault().getHierarchy().getConfigFile();
 			int start = configFile.lastIndexOf(File.separator);
 			int end = configFile.lastIndexOf(".lst");
-			String fileName = configFile.substring(start + 1,end);
-			ipe.setHandleIdentifier(fileName);
-			return fileName;
+			if (end != -1) {
+				configFile = configFile.substring(start+1,end);
+			} else {
+				configFile = configFile.substring(start+1);
+			}
+			ipe.setHandleIdentifier(configFile);
+			return configFile;
 		}
 		IProgramElement parent = ipe.getParent();
 		if (parent != null &&