documentation updates; fix for null commands with redirection expansion errors; changes to job notifications for interactive shells sourcing files; fix underflow issue with word_top

tests/errors.right

@@ -330,6 +330,11 @@ bash: line 1: readonly: `AA[4]': not a valid identifier
 array: 1
 sh: line 1: export: `AA[4]': not a valid identifier
 sh: line 1: readonly: `AA[4]': not a valid identifier
+bash: -c: line 5: syntax error: unexpected end of file from command on line 1
+bash: -c: line 3: syntax error: unexpected end of file from command on line 1
+bash: -c: line 4: syntax error: unexpected end of file from command on line 1
+bash: -c: line 5: syntax error: unexpected end of file from command on line 1
+bash: -c: line 7: syntax error: unexpected end of file from command on line 1
 bash: line 1: return: can only `return' from a function or sourced script
 after return
 bash: line 1: return: can only `return' from a function or sourced script
@@ -338,4 +343,4 @@ sh: line 1: unset: `a-b': not a valid identifier
 sh: line 1: /nosuchfile: No such file or directory
 sh: line 1: trap: SIGNOSIG: invalid signal specification
 after trap
-./errors.tests: line 393: `!!': not a valid identifier
+./errors.tests: line 396: `!!': not a valid identifier

tests/errors.tests

@@ -371,6 +371,9 @@ ${THIS_SH} ./errors10.sub
 # invalid identifiers to readonly/export
 ${THIS_SH} ./errors11.sub
 
+# EOF when parsing compound commands
+${THIS_SH} ./errors12.sub
+
 ${THIS_SH} -c 'return ; echo after return' bash
 ${THIS_SH} -o posix -c 'return ; echo after return' bash
 

tests/errors12.sub

@@ -0,0 +1,42 @@
+: ${THIS_SH:=./bash}
+
+# various error messages about incomplete compound commands
+
+${THIS_SH} -c 'if
+	true; true
+then
+	echo foo bar' bash
+
+${THIS_SH} -c 'while false; do
+	echo true' bash
+
+${THIS_SH} -c 'until false
+do
+	echo false
+' bash
+
+${THIS_SH} -c 'for f
+in 1 2 3
+do
+	: ; :' bash
+
+${THIS_SH} -c 'case foo in
+bar)	if false
+	then
+		true
+	fi
+	;;
+' bash
+
+# this tripped up ubsan
+x()
+{
+    case y in         
+        z)    
+            if (! false); then
+              foo=bar
+            fi
+            ;;
+    esac
+}
+