handle unknown shader compilation bugs a little better

1 files changed, 5 insertions, 4 deletions

diff --git a/src/library_gl.js b/src/library_gl.js
index 261780ce..90c618c7 100644
--- a/src/library_gl.js
+++ b/src/library_gl.js
@@ -1548,9 +1548,7 @@ var LibraryGL = {
 #endif
     var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
     // Work around a bug in Chromium which causes getShaderInfoLog to return null
-    if (!log) {
-      log = "";
-    }
+    if (!log) log = '(unknown error)';
     log = log.substr(0, maxLength - 1);
     writeStringToMemory(log, infoLog);
     if (length) {
@@ -1564,7 +1562,10 @@ var LibraryGL = {
     GL.validateGLObjectID(GL.shaders, shader, 'glGetShaderiv', 'shader');
 #endif
     if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
-      {{{ makeSetValue('p', '0', 'GLctx.getShaderInfoLog(GL.shaders[shader]).length + 1', 'i32') }}};
+      var log = GLctx.getShaderInfoLog(GL.shaders[shader]);
+      // Work around a bug in Chromium which causes getShaderInfoLog to return null
+      if (!log) log = '(unknown error)';
+      {{{ makeSetValue('p', '0', 'log.length + 1', 'i32') }}};
     } else {
       {{{ makeSetValue('p', '0', 'GLctx.getShaderParameter(GL.shaders[shader], pname)', 'i32') }}};
     }