Fix array compound literal parsing

src/defs.h

@@ -14,7 +14,7 @@
 #define MAX_TOKEN_LEN 256
 #define MAX_ID_LEN 64
 #define MAX_LINE_LEN 256
-#define MAX_VAR_LEN 32
+#define MAX_VAR_LEN 128
 #define MAX_TYPE_LEN 32
 #define MAX_PARAMS 8
 #define MAX_LOCALS 1600
@@ -410,6 +410,11 @@ struct var {
      * the variable is based on the top of the local stack.
      */
     bool ofs_based_on_stack_top;
+
+    /* True when this variable was synthesized to hold a compound literal
+     * (e.g., array or struct literal temporaries).
+     */
+    bool is_compound_literal;
 };
 
 typedef struct {

src/globals.c

@@ -1448,11 +1448,16 @@ void error(char *msg)
 
     strcpy(diagnostic + i, "^ Error occurs here");
 
-    /* TODO: Implement line/column tracking for precise error location
-     * reporting. Current implementation only shows source position offset.
-     */
-    printf("[Error]: %s\nOccurs at source location %d.\n%s\n", msg,
-           SOURCE->size, diagnostic);
+    /* Backtrack SOURCE to find line of position */
+    int line = 1;
+    for (i = 0; i < start_idx; i++) {
+        if (SOURCE->elements[i] == '\n')
+            line++;
+    }
+    int column = SOURCE->size - start_idx + 1;
+
+    printf("[Error]: %s\nOccurs at source location %d:%d.\n%s\n", msg, line,
+           column, diagnostic);
     abort();
 }