diff --git a/libyasm/bytecode.c b/libyasm/bytecode.c
index d3d039a2..6718431c 100644
--- a/libyasm/bytecode.c
+++ b/libyasm/bytecode.c
@@ -1156,6 +1156,8 @@ yasm_bc_create_insn(yasm_arch *arch, const unsigned long insn_data[4],
     insn->num_operands = num_operands;
     if (operands)
 	insn->operands = *operands;	/* structure copy */
+    else
+	STAILQ_INIT(&insn->operands);
     insn->num_prefixes = 0;
     insn->prefixes = NULL;
     insn->num_segregs = 0;
diff --git a/libyasm/section.c b/libyasm/section.c
index 54d49b5f..12b63bd9 100644
--- a/libyasm/section.c
+++ b/libyasm/section.c
@@ -309,6 +309,10 @@ yasm_object_destroy(yasm_object *object)
 	cur = next;
     }
 
+    /* Delete associated filenames */
+    yasm_xfree(object->src_filename);
+    yasm_xfree(object->obj_filename);
+
     /* Delete symbol table and line mappings */
     yasm_symtab_destroy(object->symtab);
     yasm_linemap_destroy(object->linemap);
diff --git a/modules/objfmts/elf/elf.c b/modules/objfmts/elf/elf.c
index 84d50739..0734dff5 100644
--- a/modules/objfmts/elf/elf.c
+++ b/modules/objfmts/elf/elf.c
@@ -567,6 +567,8 @@ elf_secthead_destroy(elf_secthead *shead)
     if (shead == NULL)
 	yasm_internal_error(N_("shead is null"));
 
+    yasm_intnum_destroy(shead->size);
+
     yasm_xfree(shead);
 }
 
diff --git a/modules/parsers/gas/gas-token.re b/modules/parsers/gas/gas-token.re
index 247c8980..aa923634 100644
--- a/modules/parsers/gas/gas-token.re
+++ b/modules/parsers/gas/gas-token.re
@@ -137,7 +137,7 @@ fill(yasm_parser_gas *parser_gas, YYCTYPE *cursor)
     if(!s->eof){
 	size_t cnt = s->tok - s->bot;
 	if(cnt){
-	    memcpy(s->bot, s->tok, (size_t)(s->lim - s->tok));
+	    memmove(s->bot, s->tok, (size_t)(s->lim - s->tok));
 	    s->tok = s->bot;
 	    s->ptr -= cnt;
 	    cursor -= cnt;
diff --git a/modules/parsers/nasm/nasm-token.re b/modules/parsers/nasm/nasm-token.re
index 6d9f0064..e06ec2c8 100644
--- a/modules/parsers/nasm/nasm-token.re
+++ b/modules/parsers/nasm/nasm-token.re
@@ -62,7 +62,7 @@ fill(yasm_parser_nasm *parser_nasm, YYCTYPE *cursor)
     if(!s->eof){
 	size_t cnt = s->tok - s->bot;
 	if(cnt){
-	    memcpy(s->bot, s->tok, (size_t)(s->lim - s->tok));
+	    memmove(s->bot, s->tok, (size_t)(s->lim - s->tok));
 	    s->tok = s->bot;
 	    s->ptr -= cnt;
 	    cursor -= cnt;