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Assert

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This commit is contained in:
Kornel Lesiński 2019-01-17 16:04:37 +00:00
parent 8fd84dd4ff
commit f7337084ad
1 changed files with 1 additions and 0 deletions
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src/png/scan_lines.rs
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@ -153,6 +153,7 @@ impl Iterator for ScanLineRanges {
let bits_per_line = pixels_per_line * u32::from(self.bits_per_pixel); let bits_per_line = pixels_per_line * u32::from(self.bits_per_pixel);
let bytes_per_line = ((bits_per_line + 7) / 8) as usize; let bytes_per_line = ((bits_per_line + 7) / 8) as usize;
let len = bytes_per_line + 1; let len = bytes_per_line + 1;
assert!(self.left >= len);
self.left -= len; self.left -= len;
Some((len, current_pass)) Some((len, current_pass))
} }