Use logException consistently and use logDiagnostic

Many places around were re-inventing logException with varying level of success.
In addition, the full error is now printed as a diagnostic instead of debug.
This is more in line with the description of `LogLevel.diagnostic`
("Extended user information (e.g. for more detailed error information)"),
as opposed to the one of `LogLevel.debug_`
("Developer information useful for algorithm debugging").

source/vibe/core/core.d

@@ -102,9 +102,8 @@ int runApplication(string[]* args_out = null)
 	version (VibeDebugCatchAll) {
 		try {
 			status = runEventLoop();
-		} catch( Throwable th ){
-			logError("Unhandled exception in event loop: %s", th.msg);
-			logDiagnostic("Full exception: %s", th.toString().sanitize());
+		} catch (Throwable th) {
+			th.logException("Unhandled exception in event loop");
 			return 1;
 		}
 	} else {
@@ -908,9 +907,7 @@ Timer setTimer(Duration timeout, void delegate() callback, bool periodic = false
 	return setTimer(timeout, () @trusted nothrow {
 		try callback();
 		catch (Exception e) {
-			logWarn("Timer callback failed: %s", e.msg);
-			scope (failure) assert(false);
-			logDebug("Full error: %s", e.toString().sanitize);
+			e.logException!(LogLevel.warn)("Timer callback failed");
 		}
 	}, periodic);
 }

source/vibe/core/log.d

@@ -211,9 +211,9 @@ void logException(LogLevel level = LogLevel.error)(Throwable exception,
     string file = __FILE__, int line = __LINE__)
 @safe nothrow {
 	doLog(level, mod, func, file, line, "%s: %s", error_description, exception.msg);
-	try doLog(LogLevel.debug_, mod, func, file, line,
+	try doLog(LogLevel.diagnostic, mod, func, file, line,
               "Full exception: %s", () @trusted { return exception.toString(); } ());
-	catch (Exception e) logDebug("Failed to print full exception: %s", e.msg);
+	catch (Exception e) logDiagnostic("Failed to print full exception: %s", e.msg);
 }
 
 ///

source/vibe/core/net.d

@@ -143,9 +143,8 @@ TCPListener listenTCP(ushort port, void delegate(TCPConnection) connection_callb
 	return listenTCP(port, (conn) @trusted nothrow {
 		try connection_callback(conn);
 		catch (Exception e) {
-			logError("Handling of connection failed: %s", e.msg);
+			e.logException("Handling of connection failed");
 			conn.close();
-			logDebug("Full error: %s", e);
 		}
 	}, address, options);
 }

source/vibe/core/task.d

@@ -399,8 +399,8 @@ final package class TaskFiber : Fiber {
 						debug (VibeTaskLog) logTrace("putting fiber to sleep waiting for new task...");
 						Fiber.yield();
 					} catch (Exception e) {
-						logWarn("CoreTaskFiber was resumed with exception but without active task!");
-						logDiagnostic("Full error: %s", e.toString().sanitize());
+						e.logException!(LogLevel.warn)(
+							"CoreTaskFiber was resumed with exception but without active task");
 					}
 					if (m_shutdown) return;
 				}
@@ -430,9 +430,7 @@ final package class TaskFiber : Fiber {
 						logDebug("Task exited while an interrupt was in flight.");
 				} catch (Exception e) {
 					debug if (ms_taskEventCallback) ms_taskEventCallback(TaskEvent.fail, handle);
-					import std.encoding;
-					logCritical("Task terminated with uncaught exception: %s", e.msg);
-					logDebug("Full error: %s", e.toString().sanitize());
+					e.logException!(LogLevel.critical)("Task terminated with uncaught exception");
 				}
 
 				debug assert(Thread.getThis() is m_thread, "Fiber moved?");
@@ -472,9 +470,8 @@ final package class TaskFiber : Fiber {
 				// make the fiber available for the next task
 				recycleFiber(this);
 			}
-		} catch(UncaughtException th) {
-			logCritical("CoreTaskFiber was terminated unexpectedly: %s", th.msg);
-			logDiagnostic("Full error: %s", th.toString().sanitize());
+		} catch (UncaughtException th) {
+			th.logException("CoreTaskFiber was terminated unexpectedly");
 		} catch (Throwable th) {
 			import std.stdio : stderr, writeln;
 			import core.stdc.stdlib : abort;
@@ -1016,8 +1013,7 @@ package struct TaskScheduler {
 			assert(th, "Fiber returned exception object that is not a Throwable!?");
 
 			assert(() @trusted nothrow { return t.fiber.state; } () == Fiber.State.TERM);
-			logError("Task terminated with unhandled exception: %s", th.msg);
-			logDebug("Full error: %s", () @trusted { return th.toString().sanitize; } ());
+			th.logException("Task terminated with unhandled exception");
 
 			// always pass Errors on
 			if (auto err = cast(Error)th) throw err;

source/vibe/core/taskpool.d

@@ -349,8 +349,7 @@ private final class WorkerThread : Thread {
 			handleWorkerTasks();
 			logDebug("Worker thread exit.");
 		} catch (Throwable th) {
-			logFatal("Worker thread terminated due to uncaught error: %s", th.msg);
-			logDebug("Full error: %s", th.toString().sanitize());
+			th.logException!(LogLevel.fatal)("Worker thread terminated due to uncaught error");
 			abort();
 		}
 	}

tests/0-tcpproxy.d

@@ -112,8 +112,7 @@ int main()
 	runTask({
 		try runTest();
 		catch (Throwable th) {
-			logError("Test failed: %s", th.msg);
-			logDiagnostic("Full error: %s", th);
+			th.logException("Test failed");
 			ret = 1;
 		} finally exitEventLoop(true);
 	});