ast.rb: RubyVM::AST.parse and .of accepts `save_script_lines: true`

This option makes the parser keep the original source as an array of
the original code lines. This feature exploits the mechanism of
`SCRIPT_LINES__` but records only the specified code that is passed to
RubyVM::AST.of or .parse, instead of recording all parsed program texts.

1 files changed, 1 insertions, 0 deletions

diff --git a/compile.c b/compile.c
index c58a6c204a..30c75119b2 100644
--- a/compile.c
+++ b/compile.c
@@ -1329,6 +1329,7 @@ new_child_iseq(rb_iseq_t *iseq, const NODE *const node,
     ast.root = node;
     ast.compile_option = 0;
     ast.line_count = -1;
+    ast.script_lines = Qfalse;
 
     debugs("[new_child_iseq]> ---------------------------------------\n");
     int isolated_depth = ISEQ_COMPILE_DATA(iseq)->isolated_depth;