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[Backtracing] Fix bug in Compact Image Map decoder. #79394

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Merged
merged 1 commit into from
Feb 14, 2025
Merged

[Backtracing] Fix bug in Compact Image Map decoder. #79394

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2 changes: 1 addition & 1 deletion docs/CompactImageMapFormat.md
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@ need to be stored in CIF data:
| 8 | `/System/Applications` |
| 9 | `/Applications` |
| 10 | `C:\Windows\System32` |
| 11 | `C:\Program Files\` |
| 11 | `C:\Program Files` |

Codes below 32 are reserved for future expansion of the fixed list.

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3 changes: 2 additions & 1 deletion stdlib/public/RuntimeModule/CompactImageMap.swift
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Expand Up @@ -244,14 +244,15 @@ public enum CompactImageMapFormat {
if (byte & 0x40) == 0 {
code = Int(byte & 0x3f)
} else {
let byteCount = Int(byte & 0x3f)
let byteCount = Int(byte & 0x3f) + 1
code = 0
for _ in 0..<byteCount {
guard let byte = iterator.next() else {
return nil
}
code = (code << 8) | Int(byte)
}
code += 64
}

#if DEBUG_COMPACT_IMAGE_MAP
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