Log backtraces with the same log level as the error messages, whatever that is.

It's not very useful to log backtraces always as debug, since that implies getting all the log messages, while backtraces would still help debug a particular error.

lib/SimpleSAML/Error/Exception.php

@@ -196,15 +196,25 @@ class SimpleSAML_Error_Exception extends Exception
     /**
      * Print the backtrace to the log if the 'debug' option is enabled in the configuration.
      */
-    protected function logBacktrace()
+    protected function logBacktrace($level = \SimpleSAML\Logger::DEBUG)
     {
         if (!SimpleSAML_Configuration::getInstance()->getBoolean('debug', false)) {
             return;
         }
 
         $backtrace = $this->formatBacktrace();
+
+        $callback = array('\SimpleSAML\Logger');
+        $functions = array(
+            \SimpleSAML\Logger::ERR     => 'error',
+            \SimpleSAML\Logger::WARNING => 'warning',
+            \SimpleSAML\Logger::INFO    => 'info',
+            \SimpleSAML\Logger::DEBUG   => 'debug',
+        );
+        $callback[] = $functions[$level];
+
         foreach ($backtrace as $line) {
-            SimpleSAML\Logger::debug($line);
+            call_user_func($callback, $line);
         }
     }
 
@@ -224,7 +234,7 @@ class SimpleSAML_Error_Exception extends Exception
             SimpleSAML\Logger::INFO    => 'logInfo',
             SimpleSAML\Logger::DEBUG   => 'logDebug',
         );
-        call_user_func(array($this, $fn[$default_level]));
+        call_user_func(array($this, $fn[$default_level]), $default_level);
     }
 
 
@@ -236,7 +246,7 @@ class SimpleSAML_Error_Exception extends Exception
     public function logError()
     {
         SimpleSAML\Logger::error($this->getClass().': '.$this->getMessage());
-        $this->logBacktrace();
+        $this->logBacktrace(\SimpleSAML\Logger::ERR);
     }
 
 
@@ -248,7 +258,7 @@ class SimpleSAML_Error_Exception extends Exception
     public function logWarning()
     {
         SimpleSAML\Logger::warning($this->getClass().': '.$this->getMessage());
-        $this->logBacktrace();
+        $this->logBacktrace(\SimpleSAML\Logger::WARNING);
     }
 
 
@@ -260,7 +270,7 @@ class SimpleSAML_Error_Exception extends Exception
     public function logInfo()
     {
         SimpleSAML\Logger::info($this->getClass().': '.$this->getMessage());
-        $this->logBacktrace();
+        $this->logBacktrace(\SimpleSAML\Logger::INFO);
     }
 
 
@@ -272,7 +282,7 @@ class SimpleSAML_Error_Exception extends Exception
     public function logDebug()
     {
         SimpleSAML\Logger::debug($this->getClass().': '.$this->getMessage());
-        $this->logBacktrace();
+        $this->logBacktrace(\SimpleSAML\Logger::DEBUG);
     }