To: vim_dev@googlegroups.com
Subject: Patch 8.2.2584
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 8.2.2584
Problem:    Vim9: type error for assigning the result of list concatenation to
            a list.
Solution:   Do not consider concatenation result in a constant. (closes #7942)
Files:      src/vim9compile.c, src/testdir/test_vim9_expr.vim


*** ../vim-8.2.2583/src/vim9compile.c	2021-03-06 21:01:05.865089577 +0100
--- src/vim9compile.c	2021-03-10 18:42:25.677484820 +0100
***************
*** 4450,4456 ****
  }
  
  /*
!  *      +	number addition
   *      -	number subtraction
   *      ..	string concatenation
   */
--- 4450,4456 ----
  }
  
  /*
!  *      +	number addition or list/blobl concatenation
   *      -	number subtraction
   *      ..	string concatenation
   */
***************
*** 4532,4537 ****
--- 4532,4538 ----
  	else
  	{
  	    generate_ppconst(cctx, ppconst);
+ 	    ppconst->pp_is_const = FALSE;
  	    if (*op == '.')
  	    {
  		if (may_generate_2STRING(-2, cctx) == FAIL
*** ../vim-8.2.2583/src/testdir/test_vim9_expr.vim	2021-03-06 18:18:15.370336953 +0100
--- src/testdir/test_vim9_expr.vim	2021-03-10 18:41:57.213547971 +0100
***************
*** 1370,1375 ****
--- 1370,1378 ----
      dany[i] = i
    endfor
    assert_equal({a: 'a', 12: 12}, dany)
+ 
+   # result of glob() is "any", runtime type check
+   var sl: list<string> = glob('*.txt', false, true) + ['']
  enddef
  
  " test multiply, divide, modulo
*** ../vim-8.2.2583/src/version.c	2021-03-10 16:08:22.737770798 +0100
--- src/version.c	2021-03-10 18:19:05.756509292 +0100
***************
*** 752,753 ****
--- 752,755 ----
  {   /* Add new patch number below this line */
+ /**/
+     2584,
  /**/

-- 
Bad programs can be written in any language.

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///