From fdb92da75c0fa94cb6439423e0415839f110a252 Mon Sep 17 00:00:00 2001
From: Ethan Smith <ethan@ethanhs.me>
Date: Thu, 2 Dec 2021 04:56:36 -0800
Subject: [PATCH 1/2] Enable assertions in Emscripten debug builds

---
 configure    | 6 ++++++
 configure.ac | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/configure b/configure
index 0aceffb35065a0..17852ab1653a2b 100755
--- a/configure
+++ b/configure
@@ -7521,6 +7521,12 @@ then
 	case $ac_sys_system in
 	    SCO_SV*) OPT="$OPT -m486 -DSCO5"
 	    ;;
+      Emscripten)
+        if test "$Py_DEBUG" = 'true' ; then
+          # Compile with assertions in debug mode
+          OPT="$OPT -s ASSERTIONS=1"
+        fi
+      ;;
         esac
 	;;
 
diff --git a/configure.ac b/configure.ac
index 99fa94d1029099..7d3a321603c2f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1734,6 +1734,12 @@ then
 	case $ac_sys_system in
 	    SCO_SV*) OPT="$OPT -m486 -DSCO5"
 	    ;;
+      Emscripten)
+        if test "$Py_DEBUG" = 'true' ; then
+          # Compile with assertions in debug mode
+          OPT="$OPT -s ASSERTIONS=1"
+        fi
+      ;;
         esac
 	;;
 

From c5bfe42e76f5db9463e422132a09540805f934d1 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Thu, 2 Dec 2021 13:17:59 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Misc/NEWS.d/next/Build/2021-12-02-13-17-57.bpo-40280.H4YNr5.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Build/2021-12-02-13-17-57.bpo-40280.H4YNr5.rst

diff --git a/Misc/NEWS.d/next/Build/2021-12-02-13-17-57.bpo-40280.H4YNr5.rst b/Misc/NEWS.d/next/Build/2021-12-02-13-17-57.bpo-40280.H4YNr5.rst
new file mode 100644
index 00000000000000..70e75ada4a4220
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-12-02-13-17-57.bpo-40280.H4YNr5.rst
@@ -0,0 +1 @@
+Emscripten now builds with assertions enabled in debug builds.
\ No newline at end of file