From f1501ff4ea72e5a40bd5cb0819996e9c88aba139 Mon Sep 17 00:00:00 2001
From: nishad shabbir <238154712+Nishuuzz@users.noreply.github.com>
Date: Tue, 11 Aug 2026 16:03:10 +0530
Subject: [PATCH] Give the tools an 8MB stack on msvc

The wast parser is recursive descent, so nesting depth comes out of the
stack, and real modules nest deeply -- a switch lowers to a br_table
wrapped in one block per case. esbuild reaches 3457 levels, which msvc's
1MB default cannot parse: wat2wasm faults rather than reporting anything.

Ask for the 8MB that Linux and macOS already give us. With that, reading
esbuild's own text back works, and a debug build handles 14000 levels.

Fixes #2377.
---
 CMakeLists.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5a14a7ddf..020ad18b75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -506,6 +506,14 @@ function(wabt_executable)
   add_dependencies(everything ${EXE_NAME})
   target_link_libraries(${EXE_NAME} ${EXE_LIBS})
 
+  if (MSVC)
+    # The wast parser is recursive descent, so nesting depth costs stack, and
+    # real modules nest deeply: a switch lowers to a br_table wrapped in one
+    # block per case. msvc's 1MB default is not enough for that, so ask for
+    # the 8MB Linux and macOS give us.
+    target_link_options(${EXE_NAME} PRIVATE "/STACK:8388608")
+  endif ()
+
   if (EMSCRIPTEN)
     set(EXTRA_LINK_FLAGS
       "${EXTRA_LINK_FLAGS} -sNODERAWFS -Oz -sALLOW_MEMORY_GROWTH"