From df4ec89a03052164c2aff733726fc4fe9f56eb5f Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Fri, 11 Dec 2020 13:11:17 +0200
Subject: [PATCH] checker: fix `L1: for{ for{} }` incorrectly setting
 c.loop_label to '' after the inner loop

---
 vlib/v/checker/checker.v | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 9da730bced..d2f8beaa47 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2551,16 +2551,18 @@ fn (mut c Checker) stmt(node ast.Stmt) {
 		}
 		ast.ForCStmt {
 			c.in_for_count++
+			prev_loop_label := c.loop_label
 			c.stmt(node.init)
 			c.expr(node.cond)
 			c.stmt(node.inc)
 			c.check_loop_label(node.label, node.pos)
 			c.stmts(node.stmts)
-			c.loop_label = ''
+			c.loop_label = prev_loop_label
 			c.in_for_count--
 		}
 		ast.ForInStmt {
 			c.in_for_count++
+			prev_loop_label := c.loop_label
 			typ := c.expr(node.cond)
 			typ_idx := typ.idx()
 			if node.key_var.len > 0 && node.key_var != '_' {
@@ -2613,11 +2615,12 @@ fn (mut c Checker) stmt(node ast.Stmt) {
 			}
 			c.check_loop_label(node.label, node.pos)
 			c.stmts(node.stmts)
-			c.loop_label = ''
+			c.loop_label = prev_loop_label            
 			c.in_for_count--
 		}
 		ast.ForStmt {
 			c.in_for_count++
+			prev_loop_label := c.loop_label
 			c.expected_type = table.bool_type
 			typ := c.expr(node.cond)
 			if !node.is_inf && typ.idx() != table.bool_type_idx && !c.pref.translated {
@@ -2627,7 +2630,7 @@ fn (mut c Checker) stmt(node ast.Stmt) {
 			// how does this work currenly?
 			c.check_loop_label(node.label, node.pos)
 			c.stmts(node.stmts)
-			c.loop_label = ''
+			c.loop_label = prev_loop_label            
 			c.in_for_count--
 		}
 		ast.GlobalDecl {