dev-lang/lua: fix tests on sparc

Backport upstream patch to fix sparc tests. This just drops the bad test and
makes a semantically-identical change to another function, so no revbump needed.

Closes: https://bugs.gentoo.org/914562
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 49 insertions, 0 deletions

diff --git a/dev-lang/lua/files/lua-5.4.6-sparc-tests.patch b/dev-lang/lua/files/lua-5.4.6-sparc-tests.patch
new file mode 100644
index 000000000000..29515aad1639
--- /dev/null
+++ b/dev-lang/lua/files/lua-5.4.6-sparc-tests.patch
@@ -0,0 +1,44 @@
+https://github.com/lua/lua/commit/6baee9ef9d5657ab582c8a4b9f885ec58ed502d0
+https://bugs.gentoo.org/914562
+
+From 6baee9ef9d5657ab582c8a4b9f885ec58ed502d0 Mon Sep 17 00:00:00 2001
+From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
+Date: Fri, 8 Sep 2023 16:19:21 -0300
+Subject: [PATCH] Removed test for "corrupted binary dump"
+
+Test is too non portable. (For instance, it does not work for
+different number types.)
+--- a/src/lundump.c
++++ b/src/lundump.c
+@@ -81,7 +81,7 @@ static size_t loadUnsigned (LoadState *S, size_t limit) {
+ 
+ 
+ static size_t loadSize (LoadState *S) {
+-  return loadUnsigned(S, ~(size_t)0);
++  return loadUnsigned(S, MAX_SIZET);
+ }
+ 
+ 
+--- a/tests/calls.lua
++++ b/tests/calls.lua
+@@ -342,20 +342,6 @@ do   -- another bug (in 5.4.0)
+ end
+ 
+ 
+-do   -- another bug (since 5.2)
+-  -- corrupted binary dump: list of upvalue names is larger than number
+-  -- of upvalues, overflowing the array of upvalues.
+-  local code =
+-   "\x1b\x4c\x75\x61\x54\x00\x19\x93\x0d\x0a\x1a\x0a\x04\x08\x08\x78\x56\z
+-    \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x28\x77\x40\x00\x86\x40\z
+-    \x74\x65\x6d\x70\x81\x81\x01\x00\x02\x82\x48\x00\x02\x00\xc7\x00\x01\z
+-    \x00\x80\x80\x80\x82\x00\x00\x80\x81\x82\x78\x80\x82\x81\x86\x40\x74\z
+-    \x65\x6d\x70"
+-
+-  assert(load(code))   -- segfaults in previous versions
+-end
+-
+-
+ x = string.dump(load("x = 1; return x"))
+ a = assert(load(read1(x), nil, "b"))
+ assert(a() == 1 and _G.x == 1)
diff --git a/dev-lang/lua/lua-5.4.6.ebuild b/dev-lang/lua/lua-5.4.6.ebuild
index c7fd11588774..c5d1c9109b73 100644
--- a/dev-lang/lua/lua-5.4.6.ebuild
+++ b/dev-lang/lua/lua-5.4.6.ebuild
@@ -22,6 +22,11 @@ DEPEND="
 RDEPEND="${DEPEND}"
 BDEPEND="virtual/pkgconfig"
 
+PATCHES=(
+	# Backported variant of upstream patch to fix sparc tests, bug #914562
+	"${FILESDIR}"/${PN}-5.4.6-sparc-tests.patch
+)
+
 src_prepare() {
 	default