patch 9.0.1363: crash when :def function has :break in skipped blockv9.0.1363

Problem:    Crash when :def function has :break in skipped block. (Ernie Rael)
Solution:   Don't generate a jump for a skipped :break. (closes #12077)

3 files changed, 31 insertions, 1 deletions

diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index f9ff3bc3e..0f28ba038 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -166,6 +166,31 @@ def Test_wrong_function_name()
   delfunc g:Define
 enddef
 
+def Test_break_in_skipped_block()
+  var lines =<< trim END
+      vim9script
+
+      def FixStackFrame(): string
+          for _ in [2]
+              var path = 'xxx'
+              if !!path
+                  if false
+                      break
+                  else
+                      return 'foo'
+                  endif
+              endif
+          endfor
+          return 'xxx'
+      enddef
+
+      disas FixStackFrame
+
+      FixStackFrame()
+  END
+  v9.CheckScriptSuccess(lines)
+enddef
+
 def Test_autoload_name_mismatch()
   var dir = 'Xnamedir/autoload'
   mkdir(dir, 'pR')
diff --git a/src/version.c b/src/version.c
index b694119a5..aa9f88424 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1363,
+/**/
     1362,
 /**/
     1361,
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index fb09780cb..bc01cd83d 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -1440,6 +1440,9 @@ compile_break(char_u *arg, cctx_T *cctx)
 				   e_break_without_while_or_for, cctx) == FAIL)
 	return NULL;
 
+    if (cctx->ctx_skip == SKIP_YES)
+	return arg;
+
     if (try_scopes > 0)
 	// Inside one or more try/catch blocks we first need to jump to the
 	// "finally" or "endtry" to cleanup.  Then come to the next JUMP
@@ -1449,7 +1452,7 @@ compile_break(char_u *arg, cctx_T *cctx)
     // Jump to the end of the FOR or WHILE loop.  The instruction index will be
     // filled in later.
     if (compile_jump_to_end(el, JUMP_ALWAYS, 0, cctx) == FAIL)
-	return FAIL;
+	return NULL;
 
     return arg;
 }