From d268f6373f6007f934b4e185a82bae34a7c668e9 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 31 May 2010 22:15:34 -0400
Subject: [PATCH] Fixed crash when pushing an empty string on the
 include_stack.

Turns out you can't just ignore some pushes.  :)
---
 mojoshader_preprocessor.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mojoshader_preprocessor.c b/mojoshader_preprocessor.c
index df038fb4..1757e8b2 100644
--- a/mojoshader_preprocessor.c
+++ b/mojoshader_preprocessor.c
@@ -604,9 +604,6 @@ static int push_source(Context *ctx, const char *fname, const char *source,
                        unsigned int srclen, unsigned int linenum,
                        MOJOSHADER_includeClose close_callback)
 {
-    if (srclen == 0)
-        return 1;  // nothing to do: just pretend you did it.
-
     IncludeState *state = get_include(ctx);
     if (state == NULL)
         return 0;
@@ -644,6 +641,7 @@ static int push_source(Context *ctx, const char *fname, const char *source,
 static void pop_source(Context *ctx)
 {
     IncludeState *state = ctx->include_stack;
+    assert(state != NULL);  // more pops than pushes!
     if (state == NULL)
         return;