Log swallowed errors in debug mode

src/message.js

@@ -157,7 +157,9 @@ Message.prototype.decryptSessionKeys = async function(privateKeys, passwords) {
         try {
           await keyPacket.decrypt(password);
           keyPackets.push(keyPacket);
-        } catch (err) {}
+        } catch (err) {
+          util.print_debug_error(err);
+        }
       }));
     }));
   } else if (privateKeys) {
@@ -180,7 +182,9 @@ Message.prototype.decryptSessionKeys = async function(privateKeys, passwords) {
         try {
           await keyPacket.decrypt(privateKeyPacket);
           keyPackets.push(keyPacket);
-        } catch (err) {}
+        } catch (err) {
+          util.print_debug_error(err);
+        }
       }));
     }));
   } else {

src/openpgp.js

@@ -568,7 +568,7 @@ function parseMessage(message, format) {
  */
 function onError(message, error) {
   // log the stack trace
-  if (config.debug) { console.error(error.stack); }
+  util.print_debug_error(error);
 
   // update error message
   error.message = message + ': ' + error.message;

src/packet/packetlist.js

@@ -54,6 +54,7 @@ List.prototype.read = function (bytes) {
           parsed.tag === enums.packet.compressed) {
         throw e;
       }
+      util.print_debug_error(e);
       if (pushed) {
         this.pop(); // drop unsupported packet
       }

src/util.js

@@ -376,6 +376,18 @@ export default {
     }
   },
 
+  /**
+   * Helper function to print a debug error. Debug
+   * messages are only printed if
+   * @link module:config/config.debug is set to true.
+   * @param {String} str String of the debug message
+   */
+  print_debug_error: function (error) {
+    if (config.debug) {
+      console.error(error);
+    }
+  },
+
   // TODO rewrite getLeftNBits to work with Uint8Arrays
   getLeftNBits: function (string, bitcount) {
     const rest = bitcount % 8;