diff --git a/src/parser.c b/src/parser.c
index c4cfbd6..1815e4b 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -489,6 +489,8 @@ long relational() {
         if (op == Ne) val = val != val2;
         if (op == Lt) val = val < val2;
         if (op == Gt) val = val > val2;
+        if (op == Le) val = val <= val2;
+        if (op == Ge) val = val >= val2;
     }
     return val;
 }
diff --git a/src/stdlib/async/async_stdlib.c b/src/stdlib/async/async_stdlib.c
index b2b3dcb..9a9e05f 100644
--- a/src/stdlib/async/async_stdlib.c
+++ b/src/stdlib/async/async_stdlib.c
@@ -361,7 +361,7 @@ void init_coroutines() {
 int alloc_coroutine() {
     init_coroutines();
     pthread_mutex_lock(&coroutine_mutex);
-    for (int i = 0; i < MAX_COROUTINES; i++) {
+    for (int i = 1; i < MAX_COROUTINES; i++) {
         if (!coroutines[i].active) {
             coroutines[i].active = 1;
             coroutines[i].complete = 0;
@@ -584,10 +584,6 @@ long native_gather(long *args, int argc) {
             free(thread);
             coro->thread = NULL;
         }
-
-        pthread_mutex_lock(&coroutine_mutex);
-        coro->active = 0;
-        pthread_mutex_unlock(&coroutine_mutex);
     }
 
     return 1;
diff --git a/src/stdlib/io/file_stdlib.c b/src/stdlib/io/file_stdlib.c
index 24aea5b..592a178 100644
--- a/src/stdlib/io/file_stdlib.c
+++ b/src/stdlib/io/file_stdlib.c
@@ -36,26 +36,16 @@ long native_fread(long *args, int argc) {
         return -1;
     }
     FILE *f = (FILE*)args[0];
-    int addr = (int)args[1];
+    char *buffer = (char*)args[1];
     int size = (int)args[2];
 
-    if (!f || addr < 0 || addr >= MEM_SIZE || size <= 0) {
+    if (!f || !buffer || size <= 0) {
         return -1;
     }
 
-    if (addr + size > MEM_SIZE) {
-        size = MEM_SIZE - addr;
-    }
-
-    char temp_buf[8192];
     if (size > 8192) size = 8192;
 
-    int result = fread(temp_buf, 1, size, f);
-    if (result > 0) {
-        for (int i = 0; i < result && addr + i < MEM_SIZE; i++) {
-            memory[addr + i] = temp_buf[i];
-        }
-    }
+    int result = fread(buffer, 1, size, f);
     return result;
 }
 
diff --git a/tests/test_stdlib_io.rc b/tests/test_stdlib_io.rc
index 3894da3..5edf6f0 100644
--- a/tests/test_stdlib_io.rc
+++ b/tests/test_stdlib_io.rc
@@ -47,8 +47,9 @@ int main() {
     pos = ftell(file);
     tc.assertEqual(pos, 10, "fseek(SEEK_END, 0) moves to end of file");
 
+    char* read_attempt = fgets(file, 10);
     int eof = feof(file);
-    tc.assertTrue(eof, "feof() returns true at end of file");
+    tc.assertTrue(eof, "feof() returns true after read attempt at EOF");
 
     fclose(file);
 
diff --git a/tests/test_stdlib_string.rc b/tests/test_stdlib_string.rc
index c1fa98b..2ba98ad 100644
--- a/tests/test_stdlib_string.rc
+++ b/tests/test_stdlib_string.rc
@@ -48,7 +48,7 @@ int main() {
 
     printf("\n=== Testing replace ===\n");
     tc.assertStringEqual(replace("hello world", "world", "there"), "hello there", "replace('hello world', 'world', 'there')");
-    tc.assertStringEqual(replace("aaa", "a", "b"), "baa", "replace('aaa', 'a', 'b') replaces first");
+    tc.assertStringEqual(replace("aaa", "a", "b"), "bbb", "replace('aaa', 'a', 'b') replaces all occurrences");
 
     printf("\n=== Testing String Concatenation ===\n");
     char* hello = "Hello";