diff --git a/gcc-tools.jam b/gcc-tools.jam
index c92f238d2..fcb23e857 100644
--- a/gcc-tools.jam
+++ b/gcc-tools.jam
@@ -5,11 +5,11 @@
 # to its suitability for any purpose.
 
 # compute directories for invoking GCC
+local SPACE = " " ;
 GCC_BIN_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)bin$(SLASH) ;
 GCC_BIN_DIRECTORY ?= "" ; # Don't clobber tool names if GCC_ROOT_DIRECTORY not set
 GCC_INCLUDE_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)include ;
 GCC_STDLIB_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)lib ;
-local SPACE ?= " " ;
 
 flags gcc LINKFLAGS <runtime-link>static : -static ;
 flags gcc CFLAGS <debug-symbols>on : -g ;
diff --git a/metrowerks-tools.jam b/metrowerks-tools.jam
index e11733634..15e0b65f1 100644
--- a/metrowerks-tools.jam
+++ b/metrowerks-tools.jam
@@ -101,7 +101,7 @@ rule Cc-action
 actions metrowerks-Cc-action
 {
     $(METROWERKS_SETUP)
-    mwcc -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -nowraplines $(CFLAGS)  -I"$(HDRS)" -I- -I"$(STDHDRS)" -o "$(<)" "$(>)"
+    mwcc -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -nowraplines $(CFLAGS) -I- -I"$(HDRS)" -I"$(STDHDRS)" -o "$(<)" "$(>)"
 }
 
 #### C++ ####
@@ -113,7 +113,7 @@ rule C++-action
 actions metrowerks-C++-action
 {
     $(METROWERKS_SETUP)
-    mwcc  -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -DNOMINMAX -nowraplines -lang c++ $(CFLAGS) $(C++FLAGS) -I"$(HDRS)" -I- -I"$(STDHDRS)" -o "$(<)" "$(>)"
+    mwcc  -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -DNOMINMAX -nowraplines -lang c++ $(CFLAGS) $(C++FLAGS) -I- -I"$(HDRS)" -I"$(STDHDRS)" -o "$(<)" "$(>)"
 }
 
 #### Archive ####
diff --git a/new/assert.jam b/new/assert.jam
index 609094c9e..a8e25530b 100644
--- a/new/assert.jam
+++ b/new/assert.jam
@@ -61,7 +61,31 @@ rule true ( rule-name args * : * )
     if ! $(result__)
     {
         error-skip-frames 3 assertion failure: expecting true result from
-            "[" $(rule-name) \"$(args)\" "]" ;
+          "[" $(rule-name) 
+          [ lol->list $(args) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ]
+            "]" ;
+    }
+}
+
+# assert that the result of calling RULE-NAME on the given arguments
+# has a false logical value (is either an empty list or all empty
+# strings).
+rule false ( rule-name args * : * )
+{
+    local result__ ;
+    module [ CALLER_MODULE ]
+    {
+        result__ = [ 
+          $(rule-name) $(args) : $(2) $(3) : $(4)
+            : $(5) : $(6) : $(7) : $(8) : $(9) ] ;
+    }
+
+    if $(result__)
+    {
+        error-skip-frames 3 assertion failure: expecting false result from
+          "[" $(rule-name) 
+          [ lol->list $(args) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ]
+            "]" : got [ lol->list $(result__) ] instead  ;
     }
 }
 
diff --git a/new/errors.jam b/new/errors.jam
index c3b44319f..fbff95218 100644
--- a/new/errors.jam
+++ b/new/errors.jam
@@ -25,7 +25,8 @@ rule backtrace ( skip-frames messages * : * )
     local args = messages 2 3 4 5 6 7 8 9 ;
     while $(bt)
     {
-        ECHO $(bt[1]):$(bt[2]): "in" $(bt[4]) ;
+        local m = [ SUBST $(bt[3]) ^(.+)\\.$ $1 ] ;
+        ECHO $(bt[1]):$(bt[2]): "in" $(bt[4]) "from module" $(m) ;
         
         # the first time through, print each argument on a separate
         # line
@@ -128,7 +129,7 @@ rule lol->list ( * )
         {
             result += ":" ;
         }
-        result += \"$(n)\" ;
+        result += \"$($(n))\" ;
     }
     return $(result) ;
 }
diff --git a/python.jam b/python.jam
index 7d8622939..242c13826 100644
--- a/python.jam
+++ b/python.jam
@@ -50,8 +50,6 @@ if $(NT)
     
     GCC_PYTHON_ROOT ?= $(CYGWIN_ROOT)/usr/local ;
     GCC_PYTHON_ROOT ?= /usr/local ;
-    <gcc><*><library-path>$(GCC_PYTHON_ROOT)/lib/python$(PYTHON_VERSION)/config
-    <gcc><*><include>$(GCC_PYTHON_ROOT)/include/python$(PYTHON_VERSION)
 }
 else if $(UNIX)
 {
diff --git a/v1/gcc-tools.jam b/v1/gcc-tools.jam
index c92f238d2..fcb23e857 100644
--- a/v1/gcc-tools.jam
+++ b/v1/gcc-tools.jam
@@ -5,11 +5,11 @@
 # to its suitability for any purpose.
 
 # compute directories for invoking GCC
+local SPACE = " " ;
 GCC_BIN_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)bin$(SLASH) ;
 GCC_BIN_DIRECTORY ?= "" ; # Don't clobber tool names if GCC_ROOT_DIRECTORY not set
 GCC_INCLUDE_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)include ;
 GCC_STDLIB_DIRECTORY ?= $(GCC_ROOT_DIRECTORY)$(SLASH)lib ;
-local SPACE ?= " " ;
 
 flags gcc LINKFLAGS <runtime-link>static : -static ;
 flags gcc CFLAGS <debug-symbols>on : -g ;
diff --git a/v1/metrowerks-tools.jam b/v1/metrowerks-tools.jam
index e11733634..15e0b65f1 100644
--- a/v1/metrowerks-tools.jam
+++ b/v1/metrowerks-tools.jam
@@ -101,7 +101,7 @@ rule Cc-action
 actions metrowerks-Cc-action
 {
     $(METROWERKS_SETUP)
-    mwcc -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -nowraplines $(CFLAGS)  -I"$(HDRS)" -I- -I"$(STDHDRS)" -o "$(<)" "$(>)"
+    mwcc -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -nowraplines $(CFLAGS) -I- -I"$(HDRS)" -I"$(STDHDRS)" -o "$(<)" "$(>)"
 }
 
 #### C++ ####
@@ -113,7 +113,7 @@ rule C++-action
 actions metrowerks-C++-action
 {
     $(METROWERKS_SETUP)
-    mwcc  -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -DNOMINMAX -nowraplines -lang c++ $(CFLAGS) $(C++FLAGS) -I"$(HDRS)" -I- -I"$(STDHDRS)" -o "$(<)" "$(>)"
+    mwcc  -maxerrors 20 -maxwarnings 20 -c -warn on,nounusedexpr,nounused -cwd include -U$(UNDEFS) -D$(DEFINES) -DNOMINMAX -nowraplines -lang c++ $(CFLAGS) $(C++FLAGS) -I- -I"$(HDRS)" -I"$(STDHDRS)" -o "$(<)" "$(>)"
 }
 
 #### Archive ####
diff --git a/v1/python.jam b/v1/python.jam
index 7d8622939..242c13826 100644
--- a/v1/python.jam
+++ b/v1/python.jam
@@ -50,8 +50,6 @@ if $(NT)
     
     GCC_PYTHON_ROOT ?= $(CYGWIN_ROOT)/usr/local ;
     GCC_PYTHON_ROOT ?= /usr/local ;
-    <gcc><*><library-path>$(GCC_PYTHON_ROOT)/lib/python$(PYTHON_VERSION)/config
-    <gcc><*><include>$(GCC_PYTHON_ROOT)/include/python$(PYTHON_VERSION)
 }
 else if $(UNIX)
 {
diff --git a/v2/errors.jam b/v2/errors.jam
index c3b44319f..fbff95218 100644
--- a/v2/errors.jam
+++ b/v2/errors.jam
@@ -25,7 +25,8 @@ rule backtrace ( skip-frames messages * : * )
     local args = messages 2 3 4 5 6 7 8 9 ;
     while $(bt)
     {
-        ECHO $(bt[1]):$(bt[2]): "in" $(bt[4]) ;
+        local m = [ SUBST $(bt[3]) ^(.+)\\.$ $1 ] ;
+        ECHO $(bt[1]):$(bt[2]): "in" $(bt[4]) "from module" $(m) ;
         
         # the first time through, print each argument on a separate
         # line
@@ -128,7 +129,7 @@ rule lol->list ( * )
         {
             result += ":" ;
         }
-        result += \"$(n)\" ;
+        result += \"$($(n))\" ;
     }
     return $(result) ;
 }
diff --git a/v2/util/assert.jam b/v2/util/assert.jam
index 609094c9e..a8e25530b 100644
--- a/v2/util/assert.jam
+++ b/v2/util/assert.jam
@@ -61,7 +61,31 @@ rule true ( rule-name args * : * )
     if ! $(result__)
     {
         error-skip-frames 3 assertion failure: expecting true result from
-            "[" $(rule-name) \"$(args)\" "]" ;
+          "[" $(rule-name) 
+          [ lol->list $(args) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ]
+            "]" ;
+    }
+}
+
+# assert that the result of calling RULE-NAME on the given arguments
+# has a false logical value (is either an empty list or all empty
+# strings).
+rule false ( rule-name args * : * )
+{
+    local result__ ;
+    module [ CALLER_MODULE ]
+    {
+        result__ = [ 
+          $(rule-name) $(args) : $(2) $(3) : $(4)
+            : $(5) : $(6) : $(7) : $(8) : $(9) ] ;
+    }
+
+    if $(result__)
+    {
+        error-skip-frames 3 assertion failure: expecting false result from
+          "[" $(rule-name) 
+          [ lol->list $(args) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ]
+            "]" : got [ lol->list $(result__) ] instead  ;
     }
 }