diff --git a/ldebug.c b/ldebug.c
index 6cd4e071..acaa653a 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -373,6 +373,7 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
           ar->ftransfer = ci->u2.transferinfo.ftransfer;
           ar->ntransfer = ci->u2.transferinfo.ntransfer;
         }
+        break;
       }
       case 'L':
       case 'f':  /* handled by lua_getinfo */
@@ -525,8 +526,8 @@ static const char *gxf (const Proto *p, int pc, Instruction i, int isup) {
 }
 
 
- const char *getobjname (const Proto *p, int lastpc, int reg,
-                         const char **name) {
+static const char *getobjname (const Proto *p, int lastpc, int reg,
+                               const char **name) {
   int pc;
   *name = luaF_getlocalname(p, reg + 1, lastpc);
   if (*name)  /* is a local? */
diff --git a/lgc.c b/lgc.c
index e9189ac3..69d8a186 100644
--- a/lgc.c
+++ b/lgc.c
@@ -484,8 +484,8 @@ static lu_mem traversetable (global_State *g, Table *h) {
   const TValue *mode = gfasttm(g, h->metatable, TM_MODE);
   markobjectN(g, h->metatable);
   if (mode && ttisstring(mode) &&  /* is there a weak mode? */
-      ((weakkey = strchr(svalue(mode), 'k')),
-       (weakvalue = strchr(svalue(mode), 'v')),
+      (cast_void(weakkey = strchr(svalue(mode), 'k')),
+       cast_void(weakvalue = strchr(svalue(mode), 'v')),
        (weakkey || weakvalue))) {  /* is really weak? */
     black2gray(h);  /* keep table gray */
     if (!weakkey)  /* strong keys? */
diff --git a/llex.c b/llex.c
index 226127f6..d99d9015 100644
--- a/llex.c
+++ b/llex.c
@@ -29,7 +29,7 @@
 
 
 
-#define next(ls) (ls->current = zgetc(ls->z))
+#define next(ls)	(ls->current = zgetc(ls->z))
 
 
 
@@ -337,7 +337,7 @@ static unsigned long readutf8esc (LexState *ls) {
   save_and_next(ls);  /* skip 'u' */
   esccheck(ls, ls->current == '{', "missing '{'");
   r = gethexa(ls);  /* must have at least one digit */
-  while ((save_and_next(ls), lisxdigit(ls->current))) {
+  while (cast_void(save_and_next(ls)), lisxdigit(ls->current)) {
     i++;
     esccheck(ls, r <= (0x7FFFFFFFu >> 4), "UTF-8 value too large");
     r = (r << 4) + luaO_hexavalue(ls->current);
diff --git a/lobject.c b/lobject.c
index 979a6889..2c265f96 100644
--- a/lobject.c
+++ b/lobject.c
@@ -366,8 +366,8 @@ int luaO_utf8esc (char *buff, unsigned long x) {
 /*
 ** Convert a number object to a string, adding it to a buffer
 */
-static size_t tostringbuff (TValue *obj, char *buff) {
-  size_t len;
+static int tostringbuff (TValue *obj, char *buff) {
+  int len;
   lua_assert(ttisnumber(obj));
   if (ttisinteger(obj))
     len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
@@ -387,7 +387,7 @@ static size_t tostringbuff (TValue *obj, char *buff) {
 */
 void luaO_tostring (lua_State *L, TValue *obj) {
   char buff[MAXNUMBER2STR];
-  size_t len = tostringbuff(obj, buff);
+  int len = tostringbuff(obj, buff);
   setsvalue(L, obj, luaS_newlstr(L, buff, len));
 }
 
@@ -439,11 +439,11 @@ static void clearbuff (BuffFS *buff) {
 
 /*
 ** Get a space of size 'sz' in the buffer. If buffer has not enough
-** space, empty it. 'sz' must fit in an empty space.
+** space, empty it. 'sz' must fit in an empty buffer.
 */
-static char *getbuff (BuffFS *buff, size_t sz) {
+static char *getbuff (BuffFS *buff, int sz) {
   lua_assert(buff->blen <= BUFVFS); lua_assert(sz <= BUFVFS);
-  if (sz > BUFVFS - cast_sizet(buff->blen))  /* string does not fit? */
+  if (sz > BUFVFS - buff->blen)  /* not enough space? */
     clearbuff(buff);
   return buff->space + buff->blen;
 }
@@ -458,9 +458,9 @@ static char *getbuff (BuffFS *buff, size_t sz) {
 */
 static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
   if (slen <= BUFVFS) {  /* does string fit into buffer? */
-    char *bf = getbuff(buff, slen);
+    char *bf = getbuff(buff, cast_int(slen));
     memcpy(bf, str, slen);  /* add string to buffer */
-    addsize(buff, slen);
+    addsize(buff, cast_int(slen));
   }
   else {  /* string larger than buffer */
     clearbuff(buff);  /* string comes after buffer's content */
@@ -474,7 +474,7 @@ static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
 */
 static void addnum2buff (BuffFS *buff, TValue *num) {
   char *numbuff = getbuff(buff, MAXNUMBER2STR);
-  size_t len = tostringbuff(num, numbuff);  /* format number into 'numbuff' */
+  int len = tostringbuff(num, numbuff);  /* format number into 'numbuff' */
   addsize(buff, len);
 }
 
diff --git a/lstring.c b/lstring.c
index c52539a6..6ba798d9 100644
--- a/lstring.c
+++ b/lstring.c
@@ -121,8 +121,8 @@ void luaS_clearcache (global_State *g) {
   int i, j;
   for (i = 0; i < STRCACHE_N; i++)
     for (j = 0; j < STRCACHE_M; j++) {
-    if (iswhite(g->strcache[i][j]))  /* will entry be collected? */
-      g->strcache[i][j] = g->memerrmsg;  /* replace it with something fixed */
+      if (iswhite(g->strcache[i][j]))  /* will entry be collected? */
+        g->strcache[i][j] = g->memerrmsg;  /* replace it with something fixed */
     }
 }
 
diff --git a/ltablib.c b/ltablib.c
index 48a6bdfe..7e7a1012 100644
--- a/ltablib.c
+++ b/ltablib.c
@@ -306,7 +306,7 @@ static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
     }
     /* after the loop, a[i] >= P and a[lo .. i - 1] < P */
     /* next loop: repeat --j while P < a[j] */
-    while (lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
+    while ((void)lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
       if (j < i)  /* j < i  but  a[j] > P ?? */
         luaL_error(L, "invalid order function for sorting");
       lua_pop(L, 1);  /* remove a[j] */
diff --git a/lvm.c b/lvm.c
index 45788a01..d7000791 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1151,7 +1151,7 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
         TValue *rc = vRC(i);
         lua_Unsigned n;
         if (ttisinteger(rc)  /* fast track for integers? */
-            ? (n = ivalue(rc), luaV_fastgeti(L, rb, n, slot))
+            ? (cast_void(n = ivalue(rc)), luaV_fastgeti(L, rb, n, slot))
             : luaV_fastget(L, rb, rc, slot, luaH_get)) {
           setobj2s(L, ra, slot);
         }
@@ -1204,7 +1204,7 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
         TValue *rc = RKC(i);  /* value */
         lua_Unsigned n;
         if (ttisinteger(rb)  /* fast track for integers? */
-            ? (n = ivalue(rb), luaV_fastgeti(L, s2v(ra), n, slot))
+            ? (cast_void(n = ivalue(rb)), luaV_fastgeti(L, s2v(ra), n, slot))
             : luaV_fastget(L, s2v(ra), rb, slot, luaH_get)) {
           luaV_finishfastset(L, s2v(ra), slot, rc);
         }
diff --git a/manual/manual.of b/manual/manual.of
index ff69cd2c..687a5b89 100644
--- a/manual/manual.of
+++ b/manual/manual.of
@@ -1504,7 +1504,7 @@ There are two possible attributes:
 @id{const}, which declares a @x{constant variable},
 that is, a variable that cannot be assigned to
 after its initialization;
-and @id{toclose}, wich declares a to-be-closed variable @see{to-be-closed}.
+and @id{toclose}, which declares a to-be-closed variable @see{to-be-closed}.
 
 
 A chunk is also a block @see{chunks},
@@ -1549,7 +1549,7 @@ the other pending closing methods will still be called.
 
 If a coroutine yields inside a block and is never resumed again,
 the variables visible at that block will never go out of scope,
-and therefore they will not be closed.
+and therefore they will never be closed.
 Similarly, if a coroutine ends with an error,
 it does not unwind its stack,
 so it does not close any variable.
@@ -3432,7 +3432,6 @@ The new thread returned by this function shares with the original thread
 its global environment,
 but has an independent execution stack.
 
-There is no explicit function to close or to destroy a thread.
 Threads are subject to garbage collection,
 like any Lua object.