Make the "system image too large" error message more descriptive (#46570

) (cherry picked from commit a7bef77)
JuliaLang · KristofferC · Sep 21, 2022 · Jul 14, 2022 · Aug 31, 2022 · Aug 31, 2022
commit cc2b7c581354ca45b6560009756545915fb2d470
diff --git a/src/staticdata.c b/src/staticdata.c
@@ -59,6 +59,7 @@ done by `get_item_for_reloc`.
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h> // printf
+#include <inttypes.h> // PRIxPTR
 
 #include "julia.h"
 #include "julia_internal.h"
@@ -1956,9 +1957,22 @@ static void jl_save_system_image_to_stream(ios_t *f) JL_GC_DISABLED
         jl_write_gv_tagrefs(&s);
     }
 
-    if (sysimg.size > ((uintptr_t)1 << RELOC_TAG_OFFSET) ||
-        const_data.size > ((uintptr_t)1 << RELOC_TAG_OFFSET)*sizeof(void*)) {
-        jl_printf(JL_STDERR, "ERROR: system image too large\n");
+    if (sysimg.size > ((uintptr_t)1 << RELOC_TAG_OFFSET)) {
+        jl_printf(
+            JL_STDERR,
+            "ERROR: system image too large: sysimg.size is %jd but the limit is %" PRIxPTR "\n",
+            (intmax_t)sysimg.size,
+            ((uintptr_t)1 << RELOC_TAG_OFFSET)
+        );
+        jl_exit(1);
+    }
+    if (const_data.size > ((uintptr_t)1 << RELOC_TAG_OFFSET)*sizeof(void*)) {
+        jl_printf(
+            JL_STDERR,
+            "ERROR: system image too large: const_data.size is %jd but the limit is %" PRIxPTR "\n",
+            (intmax_t)const_data.size,
+            ((uintptr_t)1 << RELOC_TAG_OFFSET)*sizeof(void*)
+        );
         jl_exit(1);
     }