From 1344de56219cf83ca146c5346783f8483af534f9 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 22 Jun 2023 20:10:13 +0900
Subject: [PATCH] [Bug #19743] All but EOF can be read again after push-back

---
 parse.y                 | 2 ++
 test/ruby/test_parse.rb | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/parse.y b/parse.y
index 76386e47edc8cf..329b578f367d21 100644
--- a/parse.y
+++ b/parse.y
@@ -7121,6 +7121,7 @@ static void
 pushback(struct parser_params *p, int c)
 {
     if (c == -1) return;
+    p->eofp = 0;
     p->lex.pcur--;
     if (p->lex.pcur > p->lex.pbeg && p->lex.pcur[0] == '\n' && p->lex.pcur[-1] == '\r') {
         p->lex.pcur--;
@@ -9164,6 +9165,7 @@ parse_numeric(struct parser_params *p, int c)
             c = nextc(p);
             if (c != '-' && c != '+' && !ISDIGIT(c)) {
                 pushback(p, c);
+                c = nondigit;
                 nondigit = 0;
                 goto decode_num;
             }
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 099050dc8d4bee..bf0d9f1bd5c46e 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -1138,6 +1138,8 @@ def test_unexpected_token_after_numeric
     assert_syntax_error('0000xyz', /^    \^~~\Z/)
     assert_syntax_error('1.2i1.1', /^    \^~~\Z/)
     assert_syntax_error('1.2.3', /^   \^~\Z/)
+    assert_syntax_error('1.', /unexpected end-of-input/)
+    assert_syntax_error('1e', /expecting end-of-input/)
   end
 
   def test_truncated_source_line