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all: change optional to result of io (#16075)
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@@ -1901,8 +1901,8 @@ enum State {
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}
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// write log file and return number of bytes written
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fn write_log(s State) ?int {
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mut f := os.create('log.txt')?
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fn write_log(s State) !int {
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mut f := os.create('log.txt')!
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defer {
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f.close()
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}
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