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layout/text.rs: Add assertion for empty fontgroup

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Olaf Buddenhagen 2015-12-13 02:00:19 +01:00
parent 0b5dda3e9c
commit 422639fb60
1 changed files with 2 additions and 0 deletions
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2
components/layout/text.rs
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@ -186,6 +186,8 @@ impl TextRunScanner {
// Search for the first font in this font group that contains a glyph for this
// character.
let mut font_index = 0;
// The following code panics one way or another if this condition isn't met.
assert!(fontgroup.fonts.len() > 0);
while font_index < fontgroup.fonts.len() - 1 {
if fontgroup.fonts.get(font_index).unwrap().borrow()
.glyph_index(character)