make_argv_ref_token: Assertion `!chain->next && chain->type == CHAIN_ARGV && !chain->u.u_a.skip_last' failed.

[Andreas Schwab]

m4 1.4.10b fails on the attached input when called via autoconf.

m4 --nesting-limit=1024 --include=/usr/share/autoconf --debug=aflq 
--fatal-warning --debugfile=autom4te.cache/traces.0t --trace=AC_CANONICAL_BUILD 
--trace=AC_CANONICAL_HOST --trace=AC_CANONICAL_SYSTEM 
--trace=AC_CANONICAL_TARGET --trace=AC_CONFIG_AUX_DIR --trace=AC_CONFIG_FILES 
--trace=AC_CONFIG_HEADERS --trace=AC_CONFIG_LIBOBJ_DIR --trace=AC_CONFIG_LINKS 
--trace=AC_CONFIG_SUBDIRS --trace=AC_DEFINE_TRACE_LITERAL 
--trace=AC_FC_FREEFORM --trace=AC_FC_SRCEXT --trace=AC_INIT 
--trace=AC_LIBSOURCE --trace=AC_PROG_LIBTOOL --trace=AC_REQUIRE_AUX_FILE 
--trace=AC_SUBST --trace=AC_SUBST_TRACE --trace=AH_OUTPUT 
--trace=AM_AUTOMAKE_VERSION --trace=AM_CONDITIONAL --trace=AM_ENABLE_MULTILIB 
--trace=AM_GNU_GETTEXT --trace=AM_GNU_GETTEXT_INTL_SUBDIR 
--trace=AM_INIT_AUTOMAKE --trace=AM_MAINTAINER_MODE --trace=AM_PROG_CC_C_O 
--trace=AM_PROG_CXX_C_O --trace=AM_PROG_F77_C_O --trace=AM_PROG_FC_C_O 
--trace=LT_CONFIG_LTDL_DIR --trace=LT_INIT --trace=LT_SUPPORTED_TAG 
--trace=_AM_SUBST_NOTMAKE --trace
 =_LT_AC_TAGCONFIG --trace=_m4_warn --trace=include --trace=m4_include 
--trace=m4_pattern_allow --trace=m4_pattern_forbid --trace=m4_sinclude 
--trace=sinclude --reload-state=/usr/share/autoconf/autoconf/autoconf.m4f 
aclocal.m4 configure.in
@%:@! /bin/sh
m4: macro.c:1324: make_argv_ref_token: Assertion `!chain->next && chain->type 
== CHAIN_ARGV && !chain->u.u_a.skip_last' failed.
Aborted

git bisect is pointing fingers at
10801988a863c045aa0dc06b56575f1cc52bc586 [Stage 17: pass argv through
quoted strings.]

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

configure.in
Description: Text document

aclocal.m4
Description: Text document