commit 5fd56eb9ad410d5f67cd6bd8879285ec6b0a6207
Author: Günter Milde <mi...@lyx.org>
Date:   Tue Sep 6 21:42:06 2016 +0200

    fr/UserGuide: remove spurious language switch in an index inset.
    
    This led to errors when compiling with polyglossia (and non-TeX fonts).
    A minimal (currently non-compiling) test sample is kept in autotests/export/
    and inverted in suspiciousTests.
---
 autotests/export/languagenesting_index_inset.lyx |  185 ++++++++++++++++++++++
 development/autotests/suspiciousTests            |   20 +--
 lib/doc/fr/UserGuide.lyx                         |   17 +-
 3 files changed, 201 insertions(+), 21 deletions(-)

diff --git a/autotests/export/languagenesting_index_inset.lyx 
b/autotests/export/languagenesting_index_inset.lyx
new file mode 100644
index 0000000..0ed5961
--- /dev/null
+++ b/autotests/export/languagenesting_index_inset.lyx
@@ -0,0 +1,185 @@
+#LyX 2.3 created this file. For more info see http://www.lyx.org/
+\lyxformat 512
+\begin_document
+\begin_header
+\save_transient_properties true
+\origin unavailable
+\textclass scrbook
+\use_default_options false
+\begin_modules
+customHeadersFooters
+enumitem
+logicalmkup
+\end_modules
+\maintain_unincluded_children false
+\language french
+\language_package default
+\inputencoding auto
+\fontencoding global
+\font_roman "lmodern" "default"
+\font_sans "lmss" "default"
+\font_typewriter "lmtt" "default"
+\font_math "auto" "auto"
+\font_default_family default
+\use_non_tex_fonts true
+\font_sc false
+\font_osf false
+\font_sf_scale 100 100
+\font_tt_scale 100 100
+\use_microtype false
+\graphics default
+\default_output_format default
+\output_sync 0
+\bibtex_command bibtex
+\index_command default
+\paperfontsize 12
+\spacing single
+\use_hyperref false
+\pdf_title "Guide de l'utilisateur de LyX"
+\pdf_author "L'équipe LyX, Traduction: Adrien Rebollo, Siegfried 
Meunier-Guttin-Cluzel et Jean-Pierre Chrétien"
+\pdf_subject "LyX"
+\pdf_keywords "LyX"
+\pdf_bookmarks true
+\pdf_bookmarksnumbered true
+\pdf_bookmarksopen false
+\pdf_bookmarksopenlevel 1
+\pdf_breaklinks false
+\pdf_pdfborder false
+\pdf_colorlinks true
+\pdf_backref false
+\pdf_pdfusetitle false
+\pdf_quoted_options "linkcolor=black, citecolor=black, urlcolor=blue, 
filecolor=blue, pdfpagelayout=OneColumn, pdfnewwindow=true, pdfstartview=XYZ, 
plainpages=false"
+\papersize default
+\use_geometry false
+\use_package amsmath 1
+\use_package amssymb 1
+\use_package cancel 0
+\use_package esint 1
+\use_package mathdots 1
+\use_package mathtools 0
+\use_package mhchem 1
+\use_package stackrel 0
+\use_package stmaryrd 0
+\use_package undertilde 0
+\cite_engine basic
+\cite_engine_type default
+\biblio_style plain
+\use_bibtopic false
+\use_indices false
+\paperorientation portrait
+\suppress_date false
+\justification true
+\use_refstyle 1
+\notefontcolor #0000ff
+\branch Question
+\selected 1
+\filename_suffix 0
+\color #00ff00
+\end_branch
+\branch Réponse
+\selected 0
+\filename_suffix 0
+\color #aa55ff
+\end_branch
+\index Index
+\shortcut idx
+\color #008000
+\end_index
+\secnumdepth 3
+\tocdepth 2
+\paragraph_separation skip
+\defskip medskip
+\quotes_language french
+\papercolumns 1
+\papersides 2
+\paperpagestyle default
+\tracking_changes false
+\output_changes false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\end_header
+
+\begin_body
+
+\begin_layout Standard
+\paragraph_spacing single
+Verbatim
+\begin_inset Index idx
+status open
+
+\begin_layout Plain Layout
+
+\lang english
+Verbatim
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+If the index inset contains English text but the rest of the document is
+ french, compilation fails with 
+\end_layout
+
+\begin_layout LyX-Code
+! LaTeX Error: 
+\backslash
+begin{otherlanguage} on input line 10 ended by 
+\backslash
+end{theindex}.
+\end_layout
+
+\begin_layout Standard
+with language package Polyglossia while no error is shown with Babel.
+\end_layout
+
+\begin_layout Standard
+(Should we prevent language switches in index insets?)
+\end_layout
+
+\begin_layout Standard
+If the index inset is in a section heading, the error is cryptic:
+\end_layout
+
+\begin_layout LyX-Code
+! Undefined control sequence.
+ 
+\backslash
+in@ #1#2->
+\backslash
+begingroup 
+\backslash
+def 
+\backslash
+in@@ ##1#1{}
+\backslash
+toks@ 
+\backslash
+expandafter {
+\backslash
+in@@ #2{}{}#1...
+ l.42 }}
+\end_layout
+
+\begin_layout Standard
+\begin_inset CommandInset nomencl_print
+LatexCommand printnomenclature
+set_width "auto"
+
+\end_inset
+
+
+\begin_inset CommandInset index_print
+LatexCommand printindex
+type "idx"
+
+\end_inset
+
+
+\end_layout
+
+\end_body
+\end_document
diff --git a/development/autotests/suspiciousTests 
b/development/autotests/suspiciousTests
index 8451c58..ae59ec0 100644
--- a/development/autotests/suspiciousTests
+++ b/development/autotests/suspiciousTests
@@ -21,10 +21,6 @@ Sublabel: todo
 # side-effects: Ukrainean instead of Russian date, different hyphenation.
 export/examples/uk/splash_(dvi3|pdf[45])_texF
 
-# missing commands (polyglossia?)
-# Explore! (works with language_package==babel)
-export/doc/fr/UserGuide_.*_systemF
-
 # Missing characters (U+0361, U+1E61) in LM,
 # set different system font in the source?
 # + language nesting problem (may disappear after completed translation)
@@ -33,6 +29,10 @@ export/doc/(de/|fr/)Customization_.*_systemF
 # Probably language mess
 export/export/ja/wrong_auto_encoding_(dvi|pdf(|3))
 
+# language nesting in index insets
+# fails with polyglossia, works with language_package==babel)
+export/export/languagenesting_index_inset_.*_systemF
+
 # Missing characters with Latin Modern Unicode:
 # 0000 NULL           (where does this come from?)
 # 212B ANGSTROM SIGN  (literal character in the source, replace with 00C5)
@@ -76,14 +76,6 @@ export/examples/ko/splash_(dvi||pdf[23]?)
 
export/mathmacros/testcases_speed_(lyx16|lyx21|dvi|pdf|pdf[23]|(dvi3|pdf[45])_(texF|systemF))
 check_load/mathmacros/testcases_speed
 
-# The "longest label" marker in a labeling must be valid LaTeX (just like ERT).
-# What should we do:
-# - document this,
-# - escape special characters,
-# - convert to LaTeXString,
-# or just report this at Trac for now?
-export/export/LongestLabelWithUnderscore_[^x].*
-
 
 Sublabel: lyxbugs
 #
@@ -113,6 +105,10 @@ export/doc/attic/eu_UserGuide_xhtml
 export/doc/(es|ja)/UserGuide_xhtml
 export/examples/spreadsheet_xhtml
 
+# Compilation error if longest label marker in labeling style
+# contains underscores etc. Ticket #10371
+export/export/LongestLabelWithUnderscore_[^x].*
+
 
 Sublabel: ert
 #
diff --git a/lib/doc/fr/UserGuide.lyx b/lib/doc/fr/UserGuide.lyx
index 98db056..d036a2c 100644
--- a/lib/doc/fr/UserGuide.lyx
+++ b/lib/doc/fr/UserGuide.lyx
@@ -1,5 +1,5 @@
-#LyX 2.2 created this file. For more info see http://www.lyx.org/
-\lyxformat 508
+#LyX 2.3 created this file. For more info see http://www.lyx.org/
+\lyxformat 512
 \begin_document
 \begin_header
 \save_transient_properties true
@@ -81,6 +81,7 @@ logicalmkup
 \font_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
+\use_microtype false
 \graphics default
 \default_output_format pdf2
 \output_sync 0
@@ -8981,11 +8982,9 @@ Objets insérés
 \begin_layout Subsubsection
 Verbatim
 \begin_inset Index idx
-status collapsed
+status open
 
 \begin_layout Plain Layout
-
-\lang english
 Verbatim
 \end_layout
 
@@ -9055,14 +9054,12 @@ Verbatim
 \end_layout
 
 \begin_layout Verbatim
-
 This is Verbatim.
 \end_layout
 
 \begin_layout Verbatim
 \noindent
 \align block
-
 The following 2 lines are empty:
 \end_layout
 
@@ -9075,7 +9072,6 @@ The following 2 lines are empty:
 \end_layout
 
 \begin_layout Verbatim
-
 Almost everything is allowed in Verbatim:"%&$§#~'`
 \backslash
 }][{|
@@ -9108,7 +9104,6 @@ Verbatim
 \end_layout
 
 \begin_layout Verbatim*
-
 This is Verbatim*.
 \end_layout
 
@@ -31606,6 +31601,7 @@ Réponses
 
 \begin_layout Standard
 \begin_inset Branch Question
+inverted 0
 status open
 
 \begin_layout Standard
@@ -31619,6 +31615,7 @@ Question: Qui a été le premier prix Nobel de physique ?
 
 \begin_layout Standard
 \begin_inset Branch Réponse
+inverted 0
 status collapsed
 
 \begin_layout Standard
@@ -31792,6 +31789,7 @@ reponse}[1]{#1}
 
 \begin_layout Standard
 \begin_inset Branch Question
+inverted 0
 status open
 
 \begin_layout Standard
@@ -31828,6 +31826,7 @@ reponse}[1]{}
 
 \begin_layout Standard
 \begin_inset Branch Réponse
+inverted 0
 status collapsed
 
 \begin_layout Standard

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