Merge pull request #610 from moewew/issue568

Guard against undefined localnumber (#568)
plk · Aug 8, 2017 · 4bbc78c · 4bbc78c
2 parents 368cec0 + dec212e
commit 4bbc78c
Showing 1 changed file with 12 additions and 10 deletions.
diff --git a/tex/latex/biblatex/biblatex.sty b/tex/latex/biblatex/biblatex.sty
@@ -7126,16 +7126,18 @@
           % regenerates localnumber requiring another run but then
           % the pagebreaks change back again ... etc.
           \ifcsundef{blx@defer@\the\c@refsection @\blx@refcontext@context @\abx@field@entrykey}
-            {\listxadd\blx@localnumaux{%
-               \string\abx@aux@number%
-                 {\the\c@instcount}%
-                 {\abx@field@entrykey}%
-                 {\the\c@refsection}%
-                 {\blx@refcontext@context}%
-                 {\abx@field@localnumber}}%
-               % record that we have already generated and output localnum
-               % for this key in this refsection/refcontext
-               \csgdef{blx@defer@\the\c@refsection @\blx@refcontext@context @\abx@field@entrykey}{}}
+            {\ifundef\abx@field@localnumber
+               {}
+                {\listxadd\blx@localnumaux{%
+                   \string\abx@aux@number%
+                     {\the\c@instcount}%
+                     {\abx@field@entrykey}%
+                     {\the\c@refsection}%
+                     {\blx@refcontext@context}%
+                     {\abx@field@localnumber}}%
+                   % record that we have already generated and output localnum
+                   % for this key in this refsection/refcontext
+                   \csgdef{blx@defer@\the\c@refsection @\blx@refcontext@context @\abx@field@entrykey}{}}}
            {}}
          {}}%
        {}}