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User reported a regression between 2.26 and 2.36
when trying to .dot the following graph:
digraph g {
1 -> 2 [label="\\"]
}
2.26 shows it as '\' while 2.36 fails as:
$ dot -Tpng a.dot -o a.png
Warning: 1.dot: syntax error in line 2 near ''
Thanks to Ulya Trofimovich who found and bisected
the problem down to this commit, which fixes problem
only in git version.
commit 386e47c14b3a8e83bdf3ec8772963213095a7294
Author: Emden R. Gansner <erg@alum.mit.edu>
Date: Thu Jan 30 08:45:06 2014 -0500
Remove change made in d19b672a3c06f0ae95b1da38b63b068f71eb266f until we can
remember why this change was made.
diff --git a/lib/cgraph/scan.l b/lib/cgraph/scan.l
index 0a31f0c..5bb30b7 100644
--- a/lib/cgraph/scan.l
+++ b/lib/cgraph/scan.l
@@ -199,6 +199,7 @@ ID ({NAME}|{NUMBER})
["] BEGIN(qstring); beginstr();
<qstring>["] BEGIN(INITIAL); endstr(); return (T_qatom);
<qstring>[\\]["] addstr ("\"");
+<qstring>[\\][\\] addstr ("\\\\");
<qstring>[\\][\n] line_num++; /* ignore escaped newlines */
<qstring>([^"\\]*|[\\]) addstr(yytext);
[<] BEGIN(hstring); html_nest = 1; beginstr();
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