6 files changed, 8 insertions, 6 deletions
diff --git a/Master/texmf-dist/doc/latex/chemmacros/README b/Master/texmf-dist/doc/latex/chemmacros/README
index 22ff8e700c0..2661b9f4271 100644
--- a/Master/texmf-dist/doc/latex/chemmacros/README
+++ b/Master/texmf-dist/doc/latex/chemmacros/README
@@ -1,5 +1,5 @@
 --------------------------------------------------------------------------
-the CHEMMACROS package v5.8d 2019/09/23
+the CHEMMACROS package v5.8e 2019/09/27
 
   comprehensive support for typesetting chemistry documents
 
diff --git a/Master/texmf-dist/doc/latex/chemmacros/chemmacros_en.pdf b/Master/texmf-dist/doc/latex/chemmacros/chemmacros_en.pdf
index e3e43444c64..b62e8b0501f 100644
--- a/Master/texmf-dist/doc/latex/chemmacros/chemmacros_en.pdf
+++ b/Master/texmf-dist/doc/latex/chemmacros/chemmacros_en.pdf
diff --git a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.base.code.tex b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.base.code.tex
index 5d2e66611d3..1ea731b25c2 100644
--- a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.base.code.tex
+++ b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.base.code.tex
@@ -179,8 +179,8 @@
 \cs_new_eq:NN \chemmacros_ignore_spaces: \tex_ignorespaces:D
 
 \cs_new_protected:Npn \chemmacros_leave_vmode: { \hbox_unpack:N \c_empty_box }
-\cs_new_protected:Npn \chemmacros_nobreak:     { \tex_penalty:D \c_ten_thousand }
-\cs_new_protected:Npn \chemmacros_allow_break: { \tex_penalty:D \c_zero }
+\cs_new_protected:Npn \chemmacros_nobreak:     { \tex_penalty:D 10000 \scan_stop: }
+\cs_new_protected:Npn \chemmacros_allow_break: { \tex_penalty:D \c_zero_int }
 \cs_new_protected:Npn \chemmacros_skip_nobreak:N #1
   {
     \chemmacros_nobreak:
diff --git a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
index 629d3f89ca2..f261611bfb0 100644
--- a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
+++ b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.reactions.code.tex
@@ -278,7 +278,8 @@
 % #4: argument list ({#2}{#3}...)
 \cs_new_protected:Npn \chemmacros_declare_reaction_env:nnnn #1#2#3#4
   {
-    \exp_args:Nnx \DeclareDocumentEnvironment {#1} { !O{} \prg_replicate:nn {#3+0} {m} }
+    \exp_args:Nnx \DeclareDocumentEnvironment {#1}
+      { \int_compare:nT { #3+0 = 0 } {!} O{} \prg_replicate:nn {#3+0} {m} }
       {
         \chemmacros_add_reaction_description:n {##1}
         \__chemmacros_begin_reaction:
diff --git a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.spectroscopy.code.tex b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.spectroscopy.code.tex
index 87d53dd3ce7..748a4cb19e3 100644
--- a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.spectroscopy.code.tex
+++ b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.module.spectroscopy.code.tex
@@ -41,6 +41,7 @@
 \tl_set:Nn \l__chemmacros_nmr_coupling_nuclei_post_tl { ) }
 \tl_new:N  \l__chemmacros_nmr_coupling_bonds_tl
 \tl_new:N  \l__chemmacros_nmr_coupling_bonds_pre_tl
+\tl_new:N  \l__chemmacros_nmr_coupling_bonds_post_tl
 \tl_set:Nn \l__chemmacros_nmr_coupling_bonds_pre_tl { }
 \tl_set:Nn \l__chemmacros_nmr_coupling_bonds_post_tl { \! }
 \tl_new:N  \l__chemmacros_nmr_coupling_symbol_tl
diff --git a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.sty b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.sty
index 84915c9f558..bb1e94bd3f9 100644
--- a/Master/texmf-dist/tex/latex/chemmacros/chemmacros.sty
+++ b/Master/texmf-dist/tex/latex/chemmacros/chemmacros.sty
@@ -31,10 +31,10 @@
 
 % --------------------------------------------------------------------------
 % package information:
-\tl_const:Nn \c_chemmacros_date_tl {2019/09/27}
+\tl_const:Nn \c_chemmacros_date_tl {2019/09/30}
 \tl_const:Nn \c_chemmacros_version_major_number_tl {5}
 \tl_const:Nn \c_chemmacros_version_minor_number_tl {8}
-\tl_const:Nn \c_chemmacros_version_subrelease_tl   {e}
+\tl_const:Nn \c_chemmacros_version_subrelease_tl   {f}
 \tl_const:Nx \c_chemmacros_version_number_tl
   {
     \c_chemmacros_version_major_number_tl .