vim-patch:8.2.3416: second error is reported while exception is being thrown

Problem:    Second error is reported while exception is being thrown.
Solution:   Do not check for trailing characters when already aborting.
            (closes vim/vim#8842)
36f691f5f1

src/nvim/eval/userfunc.c

@@ -3018,7 +3018,7 @@ void ex_call(exarg_T *eap)
   }
 
   // When inside :try we need to check for following "| catch".
-  if (!failed || eap->cstack->cs_trylevel > 0) {
+  if (!aborting() && (!failed || eap->cstack->cs_trylevel > 0)) {
     // Check for trailing illegal characters and a following command.
     if (!ends_excmd(*arg)) {
       if (!failed) {