added a crash handler to dump the global undo state to file on segmentation fault. it saves to the current file path in G.sce + .crash.blend. note that this code is only enabled on release builds, it's #ifdef'd out if _DEBUG is defined. for users, if you were in edit mode when a crash happened, this will only save the mesh changes up to the time you entered edit mode.

source/blender/blenkernel/BKE_blender.h

@@ -75,6 +75,7 @@ extern void BKE_undo_name(struct bContext *C, const char *name);
 extern void BKE_reset_undo(void);
 extern char *BKE_undo_menu_string(void);
 extern void BKE_undo_number(struct bContext *C, int nr);
+void BKE_undo_save(char *fname);
 extern void BKE_undo_save_quit(void);
 
 #ifdef __cplusplus

source/blender/blenkernel/BKE_bmesh.h

@@ -1,7 +1,7 @@
 /**
  * BKE_bmesh.h    jan 2007
  *
- *	BMesh modeler structure and functions.
+ *	(old) BMesh modeler structure and functions.
  *
  * $Id$
  *
@@ -52,6 +52,7 @@ struct BME_Edge;
 struct BME_Poly;
 struct BME_Loop;
 
+/*NOTE: this is the bmesh 1.0 code.  it's completely outdated.*/
 
 /*Notes on further structure Cleanup:
 	-Remove the tflags, they belong in custom data layers

source/blender/blenkernel/intern/blender.c

@@ -725,11 +725,19 @@ char *BKE_undo_menu_string(void)
 
 	/* saves quit.blend */
 void BKE_undo_save_quit(void)
+{
+	char str[FILE_MAXDIR+FILE_MAXFILE];
+
+	BLI_make_file_string("/", str, btempdir, "quit.blend");
+
+	BKE_undo_save(str);
+}
+
+void BKE_undo_save(char *fname)
 {
 	UndoElem *uel;
 	MemFileChunk *chunk;
 	int file;
-	char str[FILE_MAXDIR+FILE_MAXFILE];
 	
 	if( (U.uiflag & USER_GLOBALUNDO)==0) return;
 	
@@ -742,9 +750,7 @@ void BKE_undo_save_quit(void)
 	/* no undo state to save */
 	if(undobase.first==undobase.last) return;
 		
-	BLI_make_file_string("/", str, btempdir, "quit.blend");
-
-	file = open(str,O_BINARY+O_WRONLY+O_CREAT+O_TRUNC, 0666);
+	file = open(fname, O_BINARY+O_WRONLY+O_CREAT+O_TRUNC, 0666);
 	if(file == -1) {
 		//XXX error("Unable to save %s, check you have permissions", str);
 		return;
@@ -758,7 +764,7 @@ void BKE_undo_save_quit(void)
 	
 	close(file);
 	
-	if(chunk) ; //XXX error("Unable to save %s, internal error", str);
-	else printf("Saved session recovery to %s\n", str);
+	if(chunk) ; //XXX error("Unable to save %s, internal error", fname);
+	else printf("Saved session recovery to %s\n", fname);
 }
 

source/blender/bmesh/intern/bmesh_polygon.c

@@ -383,8 +383,8 @@ void poly_rotate_plane(float normal[3], float (*verts)[3], int nverts)
 
 void BM_Face_UpdateNormal(BMesh *bm, BMFace *f)
 {
-	float projverts[12][3];
-	float (*proj)[3] = f->len < 12 ? projverts : MEM_mallocN(sizeof(float)*f->len*3, "projvertsn");
+	float projverts[200][3];
+	float (*proj)[3] = f->len < 200 ? projverts : MEM_mallocN(sizeof(float)*f->len*3, "projvertsn");
 	BMLoop *l = f->loopbase;
 	int i=0;
 
@@ -476,9 +476,9 @@ void bmesh_update_face_normal(BMesh *bm, BMFace *f, float (*projectverts)[3])
 /*
  * BMESH FLIP NORMAL
  * 
- *  Reverses the winding of a  faces
- *  Note that this does *not* update the calculated 
- *  Normal 
+ *  Reverses the winding of a face.
+ *  Note that this updates the calculated 
+ *  normal.
 */
 void BM_flip_normal(BMesh *bm, BMFace *f)
 {	

source/blender/bmesh/operators/utils.c

@@ -271,9 +271,15 @@ void bmesh_righthandfaces_exec(BMesh *bm, BMOperator *op)
 
 	BM_Compute_Face_Center(bm, startf, cent);
 
+	/*make sure the starting face has the correct winding*/
 	if (cent[0]*startf->no[0] + cent[1]*startf->no[1] + cent[2]*startf->no[2] < 0.0)
 		BM_flip_normal(bm, startf);
 	
+	/*now that we've found our starting face, make all connected faces
+	  have the same winding.  this is done recursively, using a manual
+	  stack (if we use simple function recursion, we'd end up overloading
+	  the stack on large meshes).*/
+
 	V_GROW(fstack);
 	fstack[0] = startf;
 	BMO_SetFlag(bm, startf, FACE_VIS);

source/blender/editors/mesh/bmesh_tools.c

@@ -1743,5 +1743,5 @@ void MESH_OT_vertices_smooth(wmOperatorType *ot)
 	/* flags */
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 
-	RNA_def_int(ot->srna, "repeat", 1, 1, 200, "How many times to smooth the mesh", "", 1, INT_MAX);
+	RNA_def_int(ot->srna, "repeat", 1, 1, 100, "Number of times to smooth the mesh", "", 1, INT_MAX);
 }

source/creator/creator.c

@@ -28,7 +28,7 @@
  */
 #include <stdlib.h>
 #include <string.h>
-
+#include <signal.h>
 
 /* for setuid / getuid */
 #ifdef __sgi
@@ -261,19 +261,42 @@ double PIL_check_seconds_timer(void);
 	}
 }*/
 
+#ifndef _DEBUG
+int segmentation_handler(int sig)
+{
+	char fname[256];
+
+	if (!G.sce[0]) {
+		char str[FILE_MAXDIR+FILE_MAXFILE];
+
+		BLI_make_file_string("/", fname, btempdir, "quit.blend");
+	} else
+		sprintf(fname, "%s.crash.blend", G.sce);
+
+	BKE_undo_save(fname);
+
+	/*induce a real crash*/
+	signal(SIGSEGV, SIG_DFL);
+	*(int*)NULL = 0;
+}
+#endif
+
 int main(int argc, char **argv)
 {
 	SYS_SystemHandle syshandle;
 	bContext *C= CTX_create();
 	int a, i, stax, stay, sizx, sizy /*XXX, scr_init = 0*/;
-
 #if defined(WIN32) || defined (__linux__)
 	int audio = 1;
 #else
 	int audio = 0;
 #endif
 
-	
+#ifndef _DEBUG
+	signal(SIGSEGV, segmentation_handler);
+	signal(SIGFPE, segmentation_handler);
+#endif
+
 #ifdef WITH_BINRELOC
 	br_init( NULL );
 #endif