From: usa@...
Date: 2016-04-22T08:00:06+00:00
Subject: [ruby-core:75099] [Ruby trunk Bug#12201] nkf.c static void fold_conv part of exression always true

Issue #12201 has been updated by Usaku NAKAMURA.

Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED

----------------------------------------
Bug #12201: nkf.c static void fold_conv part of exression always true
https://bugs.ruby-lang.org/issues/12201#change-58227

* Author: Anton Sivakov
* Status: Closed
* Priority: Normal
* Assignee: Shyouhei Urabe
* ruby -v: 
* Backport: 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED
----------------------------------------
~~~
/* new line */
	if (fold_preserve_f) {
	    f_prev = c1;
	    f_line = 0;
	    fold_state =  CR;
	} else if ((f_prev == c1 && !fold_preserve_f)
		   || (f_prev == LF && fold_preserve_f)
		  ) {        /* duplicate newline */
~~~

f_prev == c1 && !fold_preserve_f - here expression !fold_preserve_f always true because above we have if (fold_preserve_f) and here 'else if'

(f_prev == LF && fold_preserve_f) - this expression alway will be false for the same reason




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