patch 8.2.5102: interrupt not caught in test

Problem:    Interrupt not caught in test.
Solution:   Consider an exception thrown in the current try/catch when got_int
            is set.  Also catch early exit when not using try/catch.

src/indent.c

@@ -1781,7 +1781,9 @@ ex_retab(exarg_T *eap)
 	    if (vcol >= MAXCOL)
 	    {
 		emsg(_(e_resulting_text_too_long));
-		// set got_int to break out of any loop
+		// when not inside a try/catch set got_int to break out of any
+		// loop
+		if (trylevel == 0)
 		    got_int = TRUE;
 		break;
 	    }

src/testdir/runtest.vim

@@ -201,6 +201,7 @@ func RunTheTest(test)
     endtry
   endif
 
+  au VimLeavePre * call EarlyExit(g:testfunc)
   if a:test =~ 'Test_nocatch_'
     " Function handles errors itself.  This avoids skipping commands after the
     " error.
@@ -212,9 +213,7 @@ func RunTheTest(test)
     endif
   else
     try
-      au VimLeavePre * call EarlyExit(g:testfunc)
       exe 'call ' . a:test
-      au! VimLeavePre
     catch /^\cskipped/
       call add(s:messages, '    Skipped')
       call add(s:skipped, 'SKIPPED ' . a:test . ': ' . substitute(v:exception, '^\S*\s\+', '',  ''))
@@ -222,6 +221,7 @@ func RunTheTest(test)
       call add(v:errors, 'Caught exception in ' . a:test . ': ' . v:exception . ' @ ' . v:throwpoint)
     endtry
   endif
+  au! VimLeavePre
 
   " In case 'insertmode' was set and something went wrong, make sure it is
   " reset to avoid trouble with anything else.

src/testdir/test_retab.vim

@@ -82,20 +82,34 @@ func Test_retab_error()
   call assert_fails('ret 80000000000000000000', 'E475:')
 endfunc
 
-" FIXME: the try/catch does not catch the interrupt
-func FIXME_Test_retab_endless()
-  new
-  call setline(1, "\t0\t")
-  let caught = 'no'
-  try
+func RetabLoop()
   while 1
     set ts=4000
     retab 4
   endwhile
-  catch
+endfunc
+
+func Test_retab_endless()
+  " inside try/catch we catch the error message
+  new
+  call setline(1, "\t0\t")
+  let caught = 'no'
+  try
+    call RetabLoop()
+  catch /E1240:/
     let caught = v:exception
   endtry
-  call assert_notequal('no', caught)
+  call assert_match('E1240:', caught)
+  bwipe!
+  set tabstop&
+endfunc
+
+func Test_nocatch_retab_endless()
+  " not inside try/catch an interrupt is generated to get out of loops
+  new
+  call setline(1, "\t0\t")
+  call assert_fails('call RetabLoop()', ['E1240:', 'Interrupted'])
+
   bwipe!
   set tabstop&
 endfunc

src/testing.c

@@ -742,6 +742,7 @@ theend:
     suppress_errthrow = FALSE;
     in_assert_fails = FALSE;
     did_emsg = FALSE;
+    got_int = FALSE;
     msg_col = 0;
     need_wait_return = FALSE;
     emsg_on_display = FALSE;

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5102,
 /**/
     5101,
 /**/