vim-patch:8.2.0267: no check for a following cmd when calling a function fails

Problem:    No check for a following command when calling a function fails.
Solution:   Also check for a following command when inside a try block.
            (closes vim/vim#5642)
e51bb17dd0

src/nvim/eval.c

@@ -2852,7 +2852,8 @@ void ex_call(exarg_T *eap)
     }
   }
 
-  if (!failed) {
+  // When inside :try we need to check for following "| catch".
+  if (!failed || eap->cstack->cs_trylevel > 0) {
     // Check for trailing illegal characters and a following command.
     if (!ends_excmd(*arg)) {
       emsg_severe = TRUE;

src/nvim/testdir/test_user_func.vim

@@ -94,3 +94,7 @@ func Test_user_func()
   unlet g:retval g:counter
   enew!
 endfunc
+
+func Test_failed_call_in_try()
+  try | call UnknownFunc() | catch | endtry
+endfunc