diff --git a/src/compiler/ast.c b/src/compiler/ast.c
index b7c974ed1..c166686fe 100644
--- a/src/compiler/ast.c
+++ b/src/compiler/ast.c
@@ -528,11 +528,11 @@ void fprint_expr_recursive(FILE *file, Expr *expr, int indent)
 				case CONST_INT:
 					if (expr->type->type_kind >= TYPE_U8 && expr->type->type_kind <= TYPE_UXX)
 					{
-						fprintf(file, "%llu\n", expr->const_expr.i);
+						fprintf(file, "%llu\n", (unsigned long long)expr->const_expr.i);
 					}
 					else
 					{
-						fprintf(file, "%lld\n", (int64_t)expr->const_expr.i);
+						fprintf(file, "%lld\n", (long long)expr->const_expr.i);
 					}
 					break;
 				case CONST_FLOAT:
diff --git a/src/compiler/diagnostics.c b/src/compiler/diagnostics.c
index 0b0fda1cb..70a4c4ecd 100644
--- a/src/compiler/diagnostics.c
+++ b/src/compiler/diagnostics.c
@@ -30,7 +30,7 @@ static void print_error(SourceRange source_range, const char *message, PrintType
 {
 	SourcePosition position = source_file_find_position(source_range.loc);
 
-	const static int LINES_SHOWN = 4;
+	static const int LINES_SHOWN = 4;
 
 	unsigned max_line_length = (int)round(log10(position.line)) + 1;
 
diff --git a/src/compiler/expr_analysis.c b/src/compiler/expr_analysis.c
index 45d9e98bb..e1b76a24b 100644
--- a/src/compiler/expr_analysis.c
+++ b/src/compiler/expr_analysis.c
@@ -24,7 +24,7 @@ static bool expr_is_ltype(Expr *expr)
 				|| expr->identifier_expr.decl->var.kind == VARDECL_GLOBAL
 				|| expr->identifier_expr.decl->var.kind == VARDECL_PARAM);
 		case EXPR_UNARY:
-			return expr->unary_expr.operator == TOKEN_STAR;
+			return expr->unary_expr.operator == UNARYOP_DEREF;
 		case EXPR_ACCESS:
 			return expr_is_ltype(expr->access_expr.parent);
 		case EXPR_SUBSCRIPT:
@@ -413,7 +413,7 @@ static inline Decl *decl_find_by_name(Decl** decls, const char *name)
 static inline bool expr_may_be_struct_field_decl(Expr *maybe_binary)
 {
 	if (maybe_binary->expr_kind != EXPR_BINARY) return false;
-	if (maybe_binary->binary_expr.operator != TOKEN_EQ) return false;
+	if (maybe_binary->binary_expr.operator != BINARYOP_EQ) return false;
 	Expr *expr = maybe_binary->binary_expr.left;
 	while (1)
 	{
diff --git a/src/compiler/lexer.c b/src/compiler/lexer.c
index 71119122b..d87ee81b4 100644
--- a/src/compiler/lexer.c
+++ b/src/compiler/lexer.c
@@ -221,6 +221,7 @@ void skip_whitespace(Lexer *lexer)
 		{
 			case '\n':
 				lexer_store_line_end(lexer);
+				// fallthrough
 			case ' ':
 			case '\t':
 			case '\r':
diff --git a/src/compiler/llvm_codegen_expr.c b/src/compiler/llvm_codegen_expr.c
index fd9e79cbd..dfb189154 100644
--- a/src/compiler/llvm_codegen_expr.c
+++ b/src/compiler/llvm_codegen_expr.c
@@ -240,6 +240,7 @@ LLVMValueRef gencontext_emit_unary_expr(GenContext *context, Expr *expr)
 		case UNARYOP_DEC:
 			return gencontext_emit_pre_inc_dec(context, expr->unary_expr.expr, -1, false);
 	}
+	UNREACHABLE
 }
 
 
@@ -430,6 +431,7 @@ static LLVMValueRef gencontext_emit_binary(GenContext *context, Expr *expr, LLVM
 		case BINARYOP_SHL_ASSIGN:
 			UNREACHABLE
 	}
+	UNREACHABLE
 }
 
 LLVMValueRef gencontext_emit_post_unary_expr(GenContext *context, Expr *expr)
diff --git a/src/compiler/llvm_codegen_stmt.c b/src/compiler/llvm_codegen_stmt.c
index a872c2ed0..d5ba51296 100644
--- a/src/compiler/llvm_codegen_stmt.c
+++ b/src/compiler/llvm_codegen_stmt.c
@@ -201,7 +201,7 @@ void gencontext_emit_for_stmt(GenContext *context, Ast *ast)
 	// A loop must either have a body or an inc.
 	// This type of for loop is forbidden:
 	// for (;;);
-	assert(cond_block || inc_block || body_block && "For has no body, no inc and no cond.");
+	assert((cond_block || inc_block || body_block) && "For has no body, no inc and no cond.");
 
 	// Break is simple it always jumps out.
 	// For continue:
diff --git a/src/compiler/parser.c b/src/compiler/parser.c
index 76339c9f3..53946691b 100644
--- a/src/compiler/parser.c
+++ b/src/compiler/parser.c
@@ -1598,6 +1598,7 @@ static Ast *parse_stmt(Context *context)
 			sema_error_at(context->tok.span.loc - 1, "Reached the end of the file when expecting a statement.");
 			return &poisoned_ast;
 	}
+	UNREACHABLE
 }
 
 
diff --git a/src/compiler/types.c b/src/compiler/types.c
index 55e03face..cf00014f5 100644
--- a/src/compiler/types.c
+++ b/src/compiler/types.c
@@ -89,8 +89,8 @@ const char *type_to_error_string(Type *type)
 			return buffer;
 		case TYPE_ERROR_UNION:
 			TODO
-
 	}
+	UNREACHABLE
 }
 
 static void type_append_signature_name_user_defined(Decl *decl, char *dst, size_t *offset)
@@ -593,8 +593,11 @@ Type *type_find_max_type(Type *type, Type *other)
 		case TYPE_SUBARRAY:
 			TODO
 	}
+	UNREACHABLE
 }
 
+#define MAX_SEARCH_DEPTH 512
+
 Type *type_find_common_ancestor(Type *left, Type *right)
 {
 	if (left == right) return left;
@@ -609,7 +612,6 @@ Type *type_find_common_ancestor(Type *left, Type *right)
 	}
 	if (left->type_kind != TYPE_STRUCT) return NULL;
 
-	static const int MAX_SEARCH_DEPTH = 512;
 	static Type *left_types[MAX_SEARCH_DEPTH];
 	int depth = 0;
 	while (depth < MAX_SEARCH_DEPTH)
diff --git a/src/utils/file_utils.c b/src/utils/file_utils.c
index ee26f05dd..59fdd849b 100644
--- a/src/utils/file_utils.c
+++ b/src/utils/file_utils.c
@@ -150,23 +150,24 @@ void file_add_wildcard_files(const char ***files, const char *path, bool recursi
 	struct dirent *ent;
 	while ((ent = readdir(dir)))
 	{
-		if (ent->d_namlen < 4) continue;
+		size_t namelen = strlen(ent->d_name);
+		if (namelen < 4) continue;
 
 		// Doesn't end with .c3
-		if (strncmp(&ent->d_name[ent->d_namlen - 3], ".c3", 3) != 0)
+		if (strncmp(&ent->d_name[namelen - 3], ".c3", 3) != 0)
 		{
 			if (ent->d_type == DT_DIR && ent->d_name[0] != '.' && recursive)
 			{
-				char *new_path = strndup(ent->d_name, ent->d_namlen);
+				char *new_path = strndup(ent->d_name, namelen);
 				file_add_wildcard_files(files, new_path, recursive);
 				free(new_path);
 			}
 			continue;
 		}
 
-		char *name = malloc_arena(ent->d_namlen + 1);
-		memcpy(name, ent->d_name, ent->d_namlen);
-		name[ent->d_namlen] = '\0';
+		char *name = malloc_arena(namelen + 1);
+		memcpy(name, ent->d_name, namelen);
+		name[namelen] = '\0';
 		vec_add(*files, name);
 	}
 	closedir(dir);
diff --git a/src/utils/toml.c b/src/utils/toml.c
index d502239f8..7cb17fb76 100644
--- a/src/utils/toml.c
+++ b/src/utils/toml.c
@@ -38,11 +38,9 @@ char *toml_strndup(TOML_CONST char *str, size_t n)
 
 int toml_vasprintf(char **str, TOML_CONST char *format, va_list args)
 {
-    int size = 0;
-
     va_list args_copy;
     va_copy(args_copy, args);
-    size = vsnprintf(NULL, size, format, args_copy);
+	int size = vsnprintf(NULL, 0, format, args_copy);
     va_end(args_copy);
 
     if (size < 0)