From 36a8709d525b2ea770d1075800f4f25e33c13f6e Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Tue, 23 Jul 2019 02:50:11 +0300
Subject: [PATCH 1/2] Workaround for GCC 5+ noreturn issue

---
 config/compilers/compiler_gcc.h.in | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/config/compilers/compiler_gcc.h.in b/config/compilers/compiler_gcc.h.in
index 9e7f6204..22b28343 100644
--- a/config/compilers/compiler_gcc.h.in
+++ b/config/compilers/compiler_gcc.h.in
@@ -6,13 +6,17 @@
 #define DUK_VA_COPY(dest,src) __va_copy(dest,src)
 #endif
 
-#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 20500L)
-/* since gcc-2.5 */
+#if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 20500L) && (DUK_F_GCC_VERSION < 50000L)
+/* Since gcc-2.5.
+ *
+ * Disabled temporarily in GCC 5+ because of an unresolved noreturn-related
+ * issue: https://github.com/svaarala/duktape/issues/2155.
+ */
 #define DUK_NORETURN(decl)  decl __attribute__((noreturn))
 #endif
 
 #if defined(DUK_F_GCC_VERSION) && (DUK_F_GCC_VERSION >= 40500L)
-/* since gcc-4.5 */
+/* Since gcc-4.5. */
 #define DUK_UNREACHABLE()  do { __builtin_unreachable(); } while (0)
 #endif
 

From a355919b3a7b8ec60b20834dbed7f35ff3c5a2b1 Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Tue, 23 Jul 2019 02:52:08 +0300
Subject: [PATCH 2/2] Releases: GCC 5+ noreturn workaround

---
 RELEASES.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/RELEASES.rst b/RELEASES.rst
index 39c5ad21..9a19e83a 100644
--- a/RELEASES.rst
+++ b/RELEASES.rst
@@ -3532,6 +3532,12 @@ Planned
 * Use GCC (>= 5.0) and Clang builtin bswap macros, add internal DUK_BSWAP64()
   macro (GH-2122)
 
+* Short term workaround for a noreturn-related issue with GCC 5+ (GH-2155)
+  where some internal duk_require_constructor_call() calls are entirely
+  missing in compiler output in certain circumstances (GCC 5+, noreturn
+  attributes enabled, debugger support enabled); the workaround is to
+  disable noreturn macros for GCC 5+ for now (GH-2156)
+
 * Improve assertion coverage for internal structures during mark-and-sweep
   (GH-2092)