3 files changed, 22 insertions, 15 deletions
diff --git a/src/program.c b/src/program.c
index e53eb6b..e163b9b 100644
--- a/src/program.c
+++ b/src/program.c
@@ -871,12 +871,14 @@ int amal_program_save(amal_program *self, const char *filepath) {
     int err = 0;
     FILE *file = fopen(filepath, "wb");
     if(!file) {
-        err = -errno;
+        perror(filepath);
+        err = -1;
         goto cleanup;
     }
 
     if(fwrite(self->data.data, 1, self->data.size, file) != self->data.size) {
-        err = -errno;
+        fprintf(stderr, "Failed to write %zu bytes to %s\n", self->data.size, filepath);
+        err = -1;
         goto cleanup;
     }
 
diff --git a/src/std/file.c b/src/std/file.c
index 4542aba..d486843 100644
--- a/src/std/file.c
+++ b/src/std/file.c
@@ -28,10 +28,8 @@ static int scan_dir_recursive_internal(char *dir_path, int path_length, scan_dir
 
     path_length_start = path_length;
     if((dir = opendir(dir_path)) == NULL) {
-        int error;
-        error = errno;
         amal_log_perror("scan_dir_recursive");
-        return error;
+        return -1;
     }
 
     while((entry = readdir(dir)) != NULL) {
@@ -178,9 +176,16 @@ int read_whole_file(const char *filepath, Buffer *data_result) {
 
     file = fopen(filepath, "rb");
     if(!file) {
-        int error = errno;
-        amal_log_error("read_whole_file: %s failed, error: %s", filepath, strerror(error));
-        return error;
+        amal_log_error("read_whole_file: %s failed, error: %s", filepath, strerror(errno));
+        return -1;
+    }
+
+    int fd = fileno(file);
+    struct stat s;
+    if(fstat(fd, &s) == -1 || !S_ISREG(s.st_mode)) {
+        amal_log_error("read_whole_file: %s failed, error: attempted to read a non-file", filepath);
+        fclose(file);
+        return -1;
     }
 
     result = fseek(file, 0, SEEK_END);
@@ -191,9 +196,8 @@ int read_whole_file(const char *filepath, Buffer *data_result) {
     
     size = ftell(file);
     if(size == -1) {
-        int error = errno;
-        result = error;
-        amal_log_error("read_whole_file: %s failed, error: %s", filepath, strerror(error));
+        result = -1;
+        amal_log_error("read_whole_file: %s failed, error: %s", filepath, strerror(errno));
         goto cleanup;
     }
 
@@ -223,10 +227,8 @@ int read_whole_file(const char *filepath, Buffer *data_result) {
 int file_get_canonical_path(const char *filepath, char **result_path, usize *result_path_size) {
     char result_path_tmp[PATH_MAX];
     if(!realpath(filepath, result_path_tmp)) {
-        int ret;
-        ret = errno;
-        amal_log_error("file_get_canonical_path: realpath failed for path %s, error: %s", filepath, strerror(ret));
-        return ret;
+        amal_log_error("file_get_canonical_path: realpath failed for path %s, error: %s", filepath, strerror(errno));
+        return -1;
     }
     *result_path_size = strnlen(result_path_tmp, PATH_MAX);
     return_if_error(am_malloc(*result_path_size + 1, (void**)result_path));
diff --git a/src/std/hash_map.c b/src/std/hash_map.c
index b4bd4c1..4bf55c6 100644
--- a/src/std/hash_map.c
+++ b/src/std/hash_map.c
@@ -224,6 +224,9 @@ bool hash_map_get_ref(HashMap *self, BufferView key, void **value) {
     HashMapBucketNode *bucket_node;
 
     bucket_size = buffer_get_size(&self->buckets, HashMapBucket);
+    if(bucket_size == 0)
+        return bool_false;
+
     hash = self->hash_func((const u8*)key.data, key.size);
     bucket_index = hash % bucket_size;