4 files changed, 19 insertions, 19 deletions
diff --git a/src/backtrace.c b/src/backtrace.c
index 7768a3206..1e1f9fa1a 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -71,7 +71,6 @@ output_backtrace(mrb_state *mrb, mrb_int ciidx, mrb_code *pc0, output_stream_fun
   for (i = ciidx; i >= 0; i--) {
     ci = &mrb->c->cibase[i];
     filename = NULL;
-    lineno = -1;
 
     if (!ci->proc) continue;
     if (MRB_PROC_CFUNC_P(ci->proc)) {
diff --git a/src/codegen.c b/src/codegen.c
index c7b8e2d74..03c752826 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -475,6 +475,8 @@ new_msym(codegen_scope *s, mrb_sym sym)
 {
   size_t i, len;
 
+  mrb_assert(s->irep);
+
   len = s->irep->slen;
   if (len > 256) len = 256;
   for (i=0; i<len; i++) {
@@ -1106,21 +1108,23 @@ readint_mrb_int(codegen_scope *s, const char *p, int base, mrb_bool neg, mrb_boo
       codegen_error(s, "malformed readint input");
     }
 
-    if (neg) {
-      if ((MRB_INT_MIN + n)/base > result) {
-        *overflow = TRUE;
-        return 0;
+    if(base > 0) {
+      if (neg) {
+        if ((MRB_INT_MIN + n)/base > result) {
+          *overflow = TRUE;
+          return 0;
+        }
+        result *= base;
+        result -= n;
       }
-      result *= base;
-      result -= n;
-    }
-    else {
-      if ((MRB_INT_MAX - n)/base < result) {
-        *overflow = TRUE;
-        return 0;
+      else {
+        if ((MRB_INT_MAX - n)/base < result) {
+          *overflow = TRUE;
+          return 0;
+        }
+        result *= base;
+        result += n;
       }
-      result *= base;
-      result += n;
     }
     p++;
   }
diff --git a/src/dump.c b/src/dump.c
index 1acb466a0..b820f1a68 100644
--- a/src/dump.c
+++ b/src/dump.c
@@ -343,7 +343,6 @@ write_section_irep(mrb_state *mrb, mrb_irep *irep, uint8_t *bin)
   if (result != MRB_DUMP_OK) {
     return result;
   }
-  cur += rsize;
   section_size += rsize;
   write_section_irep_header(mrb, section_size, bin);
 
diff --git a/src/parse.y b/src/parse.y
index 9841351ea..e88437602 100644
--- a/src/parse.y
+++ b/src/parse.y
@@ -4243,7 +4243,6 @@ parser_yylex(parser_state *p)
     return '=';
 
   case '<':
-    last_state = p->lstate;
     c = nextc(p);
     if (c == '<' &&
         p->lstate != EXPR_DOT &&
@@ -4374,7 +4373,7 @@ parser_yylex(parser_state *p)
       p->lstate = EXPR_VALUE;
       return '?';
     }
-    token_column = newtok(p);
+    newtok(p);
     /* need support UTF-8 if configured */
     if ((isalnum(c) || c == '_')) {
       int c2 = nextc(p);
@@ -4538,7 +4537,7 @@ parser_yylex(parser_state *p)
 
     is_float = seen_point = seen_e = nondigit = 0;
     p->lstate = EXPR_END;
-    token_column = newtok(p);
+    newtok(p);
     if (c == '-' || c == '+') {
       tokadd(p, c);
       c = nextc(p);
@@ -5160,7 +5159,6 @@ parser_yylex(parser_state *p)
   {
     int result = 0;
 
-    last_state = p->lstate;
     switch (tok(p)[0]) {
     case '$':
       p->lstate = EXPR_END;