reenable on windows

we're about to terminate anyway

Author: arnetheduck

lib/system/excpt.nim

@@ -655,11 +655,13 @@ when not defined(noSignalHandler) and not defined(useNimRtl):
     when defined(memtracker):
       logPendingOps()
     # On windows, it is common that the signal handler is called from a non-Nim
-    # thread - until `rawWriteStackTrace` and friends learns to not allocate
-    # memory, we'll skip the memory allocation and avoid crashes this way
-    # On other platforms, the memory allocation may still cause crashes, but
-    # not as frequently. YOLO.
-    when hasSomeStackTrace and not defined(windows):
+    # thread and any allocation will (likely) cause a crash.
+    # On other platforms, if memory needs to be allocated and the signal happens
+    # during memory allocation, we'll alos (likely) see a crash and corrupt the
+    # memory allocator - less frequently than on windows but still.
+    # However, since we're about to go down anyway, YOLO.
+
+    when hasSomeStackTrace:
       when not usesDestructors: GC_disable()
       rawWriteStackTrace(sigHandlerBuf)
       processSignal(sign, sigHandlerBuf.add) # nice hu? currying a la Nim :-)