diff --git a/aegisub/libaegisub/include/libaegisub/line_iterator.h b/aegisub/libaegisub/include/libaegisub/line_iterator.h
index 5a8f6570c..9f67b9810 100644
--- a/aegisub/libaegisub/include/libaegisub/line_iterator.h
+++ b/aegisub/libaegisub/include/libaegisub/line_iterator.h
@@ -156,26 +156,26 @@ void line_iterator<OutputType>::getline(std::string &str) {
 	union {
 		int32_t chr;
 		char buf[4];
-	};
+	} u;
 
 	for (;;) {
-		chr = 0;
+		u.chr = 0;
 #ifdef _WIN32
-		std::streamsize read = stream->rdbuf()->_Sgetn_s(buf, 4, width);
+		std::streamsize read = stream->rdbuf()->_Sgetn_s(u.buf, 4, width);
 #else
-		std::streamsize read = stream->rdbuf()->sgetn(buf, width);
+		std::streamsize read = stream->rdbuf()->sgetn(u.buf, width);
 #endif
 		if (read < (std::streamsize)width) {
 			for (int i = 0; i < read; i++) {
-				str += buf[i];
+				str += u.buf[i];
 			}
 			stream->setstate(std::ios::eofbit);
 			return;
 		}
-		if (chr == cr) continue;
-		if (chr == lf) return;
+		if (u.chr == cr) continue;
+		if (u.chr == lf) return;
 		for (int i = 0; i < read; i++) {
-			str += buf[i];
+			str += u.buf[i];
 		}
 	}
 }
diff --git a/aegisub/src/ass_file.cpp b/aegisub/src/ass_file.cpp
index 875231ef9..578938739 100644
--- a/aegisub/src/ass_file.cpp
+++ b/aegisub/src/ass_file.cpp
@@ -69,8 +69,8 @@ namespace std {
 
 /// @brief AssFile constructor
 AssFile::AssFile ()
-: loaded(false)
-, commitId(-1)
+: commitId(-1)
+, loaded(false)
 {
 }
 
diff --git a/aegisub/src/ass_override.cpp b/aegisub/src/ass_override.cpp
index d95d1899f..41faf50f4 100644
--- a/aegisub/src/ass_override.cpp
+++ b/aegisub/src/ass_override.cpp
@@ -124,8 +124,8 @@ void AssDialogueBlockOverride::ProcessParameters(AssDialogueBlockOverride::Proce
 }
 
 AssOverrideParamProto::AssOverrideParamProto(VariableDataType type,int opt,ASS_ParameterClass classi)
-: type(type)
-, optional(opt)
+: optional(opt)
+, type(type)
 , classification(classi)
 {
 }
diff --git a/aegisub/src/ass_style.cpp b/aegisub/src/ass_style.cpp
index 5c47fb050..6f0cad425 100644
--- a/aegisub/src/ass_style.cpp
+++ b/aegisub/src/ass_style.cpp
@@ -174,7 +174,8 @@ AssStyle::AssStyle()
 }
 
 AssStyle::AssStyle(const AssStyle& s)
-: name(s.name)
+: AssEntry(s)
+, name(s.name)
 , font(s.font)
 , fontsize(s.fontsize)
 , primary(s.primary)
diff --git a/aegisub/src/audio_player_alsa.cpp b/aegisub/src/audio_player_alsa.cpp
index 68726ec31..ae5ab6c9d 100644
--- a/aegisub/src/audio_player_alsa.cpp
+++ b/aegisub/src/audio_player_alsa.cpp
@@ -391,7 +391,6 @@ void AlsaPlayer::async_write_handler(snd_async_handler_t *pcm_callback)
 
 	void *buf = malloc(player->period * player->bpf);
 	while (frames >= player->period) {
-		unsigned long start = player->cur_frame;
 		player->provider->GetAudioWithVolume(buf, player->cur_frame, player->period, player->volume);
 		int err = snd_pcm_writei(player->pcm_handle, buf, player->period);
 		if(err == -EPIPE) {
diff --git a/aegisub/src/export_fixstyle.cpp b/aegisub/src/export_fixstyle.cpp
index 241c50a3f..25171d55b 100644
--- a/aegisub/src/export_fixstyle.cpp
+++ b/aegisub/src/export_fixstyle.cpp
@@ -67,7 +67,6 @@ void AssFixStylesFilter::ProcessSubs(AssFile *subs, wxWindow *export_dialog) {
 	wxArrayString styles = subs->GetStyles();
 	std::for_each(styles.begin(), styles.end(), std::mem_fun_ref(&wxString::MakeLower));
 	styles.Sort();
-	size_t n = styles.Count();
 
 	for (entryIter cur=subs->Line.begin();cur!=subs->Line.end();cur++) {
 		AssDialogue *diag = dynamic_cast<AssDialogue*>(*cur);
diff --git a/aegisub/src/export_framerate.cpp b/aegisub/src/export_framerate.cpp
index 47e03a132..ca88ae3c9 100644
--- a/aegisub/src/export_framerate.cpp
+++ b/aegisub/src/export_framerate.cpp
@@ -252,8 +252,6 @@ int AssTransformFramerateFilter::ConvertTime(int time) {
 	int newEnd = Input->TimeAtFrame(frame + 1);
 	int newDur = newEnd - newStart;
 
-	int dongs = Input->FrameAtTime(newStart + newDur * dist, agi::vfr::END);
-
 	return newStart + newDur * dist;
 }
 
diff --git a/aegisub/src/subs_preview.cpp b/aegisub/src/subs_preview.cpp
index 4b17e9085..714f6e649 100644
--- a/aegisub/src/subs_preview.cpp
+++ b/aegisub/src/subs_preview.cpp
@@ -61,10 +61,10 @@
 ///
 SubtitlesPreview::SubtitlesPreview(wxWindow *parent,int id,wxPoint pos,wxSize size,int winStyle,wxColour col)
 : wxWindow(parent,id,pos,size,winStyle)
+, style(new AssStyle)
 , backColour(col)
 , subFile(new AssFile)
 , line(new AssDialogue)
-, style(new AssStyle)
 {
 	line->Text = "{\\q2}preview";
 
diff --git a/aegisub/src/video_provider_yuv4mpeg.cpp b/aegisub/src/video_provider_yuv4mpeg.cpp
index 8754cc373..b873b4468 100644
--- a/aegisub/src/video_provider_yuv4mpeg.cpp
+++ b/aegisub/src/video_provider_yuv4mpeg.cpp
@@ -54,12 +54,13 @@
 /// @param filename The filename to open
 YUV4MPEGVideoProvider::YUV4MPEGVideoProvider(wxString fname)
 : sf(NULL)
+, inited(false)
 , w (0)
 , h (0)
+, num_frames(-1)
 , cur_fn(-1)
 , pixfmt(Y4M_PIXFMT_NONE)
 , imode(Y4M_ILACE_NOTSET)
-, num_frames(-1)
 {
 	fps_rat.num = -1;
 	fps_rat.den = 1;