32 bit fixes (#10608)

compiler/ast.nim

@@ -271,6 +271,10 @@ type
                       # language; for interfacing with Objective C
     sfDiscardable,    # returned value may be discarded implicitly
     sfOverriden,      # proc is overriden
+    sfCallSideLineinfo# A flag for template symbols to tell the
+                      # compiler it should use line information from
+                      # the calling side of the macro, not from the
+                      # implementation.
     sfGenSym          # symbol is 'gensym'ed; do not add to symbol table
 
   TSymFlags* = set[TSymFlag]
@@ -1265,7 +1269,10 @@ proc `$`*(x: TLockLevel): string =
   else: result = $int16(x)
 
 proc `$`*(s: PSym): string =
-  result = s.name.s & "@" & $s.id
+  if s != nil:
+    result = s.name.s & "@" & $s.id
+  else:
+    result = "<nil>"
 
 proc newType*(kind: TTypeKind, owner: PSym): PType =
   new(result)