updated for version 7.4.229

Problem:    Using ":let" for listing variables and the second one is a curly
            braces expression may fail.
Solution:   Check for an "=" in a better way. (ZyX)

src/eval.c

@@ -1856,8 +1856,9 @@ ex_let(eap)
 	return;
     if (argend > arg && argend[-1] == '.')  /* for var.='str' */
 	--argend;
-    expr = vim_strchr(argend, '=');
-    if (expr == NULL)
+    expr = skipwhite(argend);
+    if (*expr != '=' && !(vim_strchr((char_u *)"+-.", *expr) != NULL
+			  && expr[1] == '='))
     {
 	/*
 	 * ":let" without "=": list variables
@@ -1886,12 +1887,14 @@ ex_let(eap)
     {
 	op[0] = '=';
 	op[1] = NUL;
-	if (expr > argend)
+	if (*expr != '=')
 	{
-	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
-		op[0] = expr[-1];   /* +=, -= or .= */
+	    if (vim_strchr((char_u *)"+-.", *expr) != NULL)
+		op[0] = *expr;   /* +=, -= or .= */
+	    expr = skipwhite(expr + 2);
 	}
-	expr = skipwhite(expr + 1);
+	else
+	    expr = skipwhite(expr + 1);
 
 	if (eap->skip)
 	    ++emsg_skip;

src/testdir/test104.in

@@ -1,4 +1,4 @@
-Tests for autoload.  vim: set ft=vim ts=8 :
+Tests for :let.  vim: set ft=vim ts=8 :
 
 STARTTEST
 :so small.vim
@@ -10,6 +10,20 @@ STARTTEST
 :catch
 :  $put ='FAIL: ' . v:exception
 :endtry
+:let a = 1
+:let b = 2
+:for letargs in ['a b', '{0 == 1 ? "a" : "b"}', '{0 == 1 ? "a" : "b"} a', 'a {0 == 1 ? "a" : "b"}']
+:  try
+:    redir => messages
+:    execute 'let' letargs
+:    redir END
+:    $put ='OK:'
+:    $put =split(substitute(messages, '\n', '\0  ', 'g'), '\n')
+:  catch
+:    $put ='FAIL: ' . v:exception
+:    redir END
+:  endtry
+:endfor
 :/^Results/,$wq! test.out
 ENDTEST
 

src/testdir/test104.ok

@@ -1,2 +1,13 @@
 Results of test104:
 OK: function('tr')
+OK:
+  a                     #1
+  b                     #2
+OK:
+  b                     #2
+OK:
+  b                     #2
+  a                     #1
+OK:
+  a                     #1
+  b                     #2

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    229,
 /**/
     228,
 /**/