[Issue 4089] New: crash when creating JSON output for incomplete struct

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4089

           Summary: crash when creating JSON output for incomplete struct
           Product: D
           Version: unspecified
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: ice-on-valid-code, patch
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: r.sagitario at gmx.de


--- Comment #0 from Rainer Schuetze <r.sagitario at gmx.de> 2010-04-14 00:01:04 PDT ---
This one-line code:

/// test.d
struct X;

causes a crash when executing

dmd -c -X test.d


Here's a patch

Index: json.c
===================================================================
--- json.c    (revision 432)
+++ json.c    (working copy)
@@ -307,16 +307,19 @@
         }
     }

-    JsonString(buf, Pmembers);
-    buf->writestring(" : [\n");
-    size_t offset = buf->offset;
-    for (int i = 0; i < members->dim; i++)
-    {   Dsymbol *s = (Dsymbol *)members->data[i];
-        if (offset != buf->offset)
-        {   buf->writestring(",\n");
-            offset = buf->offset;
+    if(members)
+    {
+        JsonString(buf, Pmembers);
+        buf->writestring(" : [\n");
+        size_t offset = buf->offset;
+        for (int i = 0; i < members->dim; i++)
+        {   Dsymbol *s = (Dsymbol *)members->data[i];
+            if (offset != buf->offset)
+            {   buf->writestring(",\n");
+                offset = buf->offset;
+            }
+            s->toJsonBuffer(buf);
         }
-        s->toJsonBuffer(buf);
     }
     JsonRemoveComma(buf);
     buf->writestring("]\n");

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