From 5eb6f851aeb42a93b5016070cc244a8c1d04972f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Wed, 15 Jul 2026 15:32:46 +0200
Subject: [PATCH 1/2] add crash file

---
 .../fuzz-crash_c/crash-9feb09f580c0cf101456c6c650ab4193b1009d07  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 test/cli/fuzz-crash_c/crash-9feb09f580c0cf101456c6c650ab4193b1009d07

diff --git a/test/cli/fuzz-crash_c/crash-9feb09f580c0cf101456c6c650ab4193b1009d07 b/test/cli/fuzz-crash_c/crash-9feb09f580c0cf101456c6c650ab4193b1009d07
new file mode 100644
index 00000000000..8577d6ccb7f
--- /dev/null
+++ b/test/cli/fuzz-crash_c/crash-9feb09f580c0cf101456c6c650ab4193b1009d07
@@ -0,0 +1 @@
+d(){e?&d=d++++F:a}
\ No newline at end of file

From b78df5da1d98cc703875586be009e01247507f22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Wed, 15 Jul 2026 15:28:13 +0200
Subject: [PATCH 2/2] fix

---
 lib/tokenize.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 3dc83082e4e..e7cdd105fde 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -8810,6 +8810,9 @@ void Tokenizer::findGarbageCode() const
             if (!cpp || mSettings.standards.cpp < Standards::CPP20 || !Token::Match(tok->previous(), "%name% : %num% ="))
                 syntaxError(tok, tok->strAt(1) + " " + tok->strAt(2));
         }
+        else if (!cpp && Token::Match(tok, "++|--") && Token::Match(tok->next(), "++|--")) {
+            syntaxError(tok, tok->str() + tok->strAt(1));
+        }
         else if (Token::simpleMatch(tok, ") return") && !Token::Match(tok->link()->previous(), "if|while|for (")) {
             if (tok->link()->previous() && tok->link()->previous()->isUpperCaseName())
                 unknownMacroError(tok->link()->previous());