[Mesa-dev] [PATCH] glsl: do not show locp information if it is not available

[Juan A. Suarez Romero]

Ignore source file, line number and column in glcpp_error() and
glcpp_warning() if those are not available.

It fixes 4 piglit tests:
  spec/glsl-1.10/compiler/version-0.frag: crash pass
  spec/glsl-1.10/compiler/version-0.vert: crash pass
  spec/glsl-es-3.00/compiler/version-0.frag: crash pass
  spec/glsl-es-3.00/compiler/version-0.vert: crash pass
---
 src/compiler/glsl/glcpp/pp.c | 41 +++++++++++++++++++++++++++--------------
 1 file changed, 27 insertions(+), 14 deletions(-)

diff --git a/src/compiler/glsl/glcpp/pp.c b/src/compiler/glsl/glcpp/pp.c
index b591279..38f031a 100644
--- a/src/compiler/glsl/glcpp/pp.c
+++ b/src/compiler/glsl/glcpp/pp.c
@@ -32,13 +32,20 @@ glcpp_error (YYLTYPE *locp, glcpp_parser_t *parser, const char *fmt, ...)
 	va_list ap;
 
 	parser->error = 1;
-	ralloc_asprintf_rewrite_tail(&parser->info_log,
-				     &parser->info_log_length,
-				     "%u:%u(%u): "
-				     "preprocessor error: ",
-				     locp->source,
-				     locp->first_line,
-				     locp->first_column);
+
+        if (locp)
+           ralloc_asprintf_rewrite_tail(&parser->info_log,
+                                        &parser->info_log_length,
+                                        "%u:%u(%u): "
+                                        "preprocessor error: ",
+                                        locp->source,
+                                        locp->first_line,
+                                        locp->first_column);
+        else
+           ralloc_asprintf_rewrite_tail(&parser->info_log,
+                                        &parser->info_log_length,
+                                        "preprocessor error: ");
+
 	va_start(ap, fmt);
 	ralloc_vasprintf_rewrite_tail(&parser->info_log,
 				      &parser->info_log_length,
@@ -53,13 +60,19 @@ glcpp_warning (YYLTYPE *locp, glcpp_parser_t *parser, const char *fmt, ...)
 {
 	va_list ap;
 
-	ralloc_asprintf_rewrite_tail(&parser->info_log,
-				     &parser->info_log_length,
-				     "%u:%u(%u): "
-				     "preprocessor warning: ",
-				     locp->source,
-				     locp->first_line,
-				     locp->first_column);
+        if (locp)
+           ralloc_asprintf_rewrite_tail(&parser->info_log,
+                                        &parser->info_log_length,
+                                        "%u:%u(%u): "
+                                        "preprocessor warning: ",
+                                        locp->source,
+                                        locp->first_line,
+                                        locp->first_column);
+        else
+           ralloc_asprintf_rewrite_tail(&parser->info_log,
+                                        &parser->info_log_length,
+                                        "preprocesor warning: ");
+
 	va_start(ap, fmt);
 	ralloc_vasprintf_rewrite_tail(&parser->info_log,
 				      &parser->info_log_length,
-- 
2.7.4