Bug 1474774 - Remove nscoord assertion that produce false positives. r=dholbert

Differential Revision: https://phabricator.services.mozilla.com/D114633
2021-05-23 01:04:18 +00:00 · 2021-05-23 01:04:18 +00:00 · 0c2b4a6155
--- a/gfx/src/nsCoord.h
+++ b/gfx/src/nsCoord.h
@ -196,7 +196,6 @@ inline nscoord NSCoordSaturatingSubtract(nscoord a, nscoord b,
      return infMinusInfResult;
    } else {
      // case (b)
-      MOZ_ASSERT_UNREACHABLE("Attempted to subtract [n - nscoord_MAX]");
      return 0;
    }
  } else {
--- a/testing/web-platform/tests/css/css-text/crashtests/word-spacing-large-value.html
+++ b/testing/web-platform/tests/css/css-text/crashtests/word-spacing-large-value.html
@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-text-3/#white-space-property">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1474774">
+<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<style>
+:last-of-type {
+  word-spacing:15946245.3ch;
+  border-right-style:solid;
+}
+</style>
+<button formaction=''>
+<small>
+AAAAAAAA
+</html>