fixes #13436 (#13615)

compiler/cgen.nim

@@ -1663,6 +1663,11 @@ proc genInitCode(m: BModule) =
 
     if beforeRetNeeded in m.initProc.flags:
       prc.add(~"\tBeforeRet_: ;$n")
+
+    if sfMainModule in m.module.flags and m.config.exc == excGoto:
+      if getCompilerProc(m.g.graph, "nimTestErrorFlag") != nil:
+        m.appcg(prc, "\t#nimTestErrorFlag();$n", [])
+
     if optStackTrace in m.initProc.options and preventStackTrace notin m.flags:
       prc.add(deinitFrame(m.initProc))
 
@@ -1990,9 +1995,10 @@ proc myClose(graph: ModuleGraph; b: PPassContext, n: PNode): PNode =
   if b == nil: return
   var m = BModule(b)
   if sfMainModule in m.module.flags:
-    let testForError = getCompilerProc(graph, "nimTestErrorFlag")
+    # phase ordering problem here: We need to announce this
-    if testForError != nil and graph.config.exc == excGoto:
+    # dependency to 'nimTestErrorFlag' before system.c has been written to disk.
-      n.add newTree(nkCall, testForError.newSymNode)
+    if m.config.exc == excGoto and getCompilerProc(graph, "nimTestErrorFlag") != nil:
+      discard cgsym(m, "nimTestErrorFlag")
 
     for i in countdown(high(graph.globalDestructors), 0):
       n.add graph.globalDestructors[i]

compiler/injectdestructors.nim

@@ -591,7 +591,8 @@ proc p(n: PNode; c: var Con; mode: ProcessMode): PNode =
               # move the variable declaration to the top of the frame:
               c.addTopVar v
               # make sure it's destroyed at the end of the proc:
-              if not isUnpackedTuple(v):
+              if not isUnpackedTuple(v) and sfThread notin v.sym.flags:
+                # do not destroy thread vars for now at all for consistency.
                 c.destroys.add genDestroy(c, v)
               elif c.inLoop > 0:
                 # unpacked tuple needs reset at every loop iteration

tests/destructor/tgotoexceptions6.nim

@@ -0,0 +1,10 @@
+discard """
+  cmd: "nim c --gc:arc --exceptions:goto $file"
+  outputsub: "Error: unhandled exception: virus detected [ValueError]"
+  exitcode: "1"
+"""
+
+# bug #13436
+proc foo =
+  raise newException(ValueError, "virus detected")
+foo()