hush: fix SEGV in % expansion

function                                             old     new   delta
expand_variables                                    2203    2217     +14

3 files changed, 5 insertions, 3 deletions

diff --git a/shell/hush_test/hush-arith/arith.right b/shell/hush_test/hush-arith/arith.right
index 8cde0ee53..83155fb03 100644
--- a/shell/hush_test/hush-arith/arith.right
+++ b/shell/hush_test/hush-arith/arith.right
@@ -63,9 +63,9 @@ hush: error in arithmetic
 40 40
 hush: error in arithmetic
 hush: divide by 0
-hush: can't exec 'let': No such file or directory
+hush: can't execute 'let': No such file or directory
 hush: error in arithmetic
-hush: can't exec 'let': No such file or directory
+hush: can't execute 'let': No such file or directory
 abc
 def
 ghi
@@ -135,4 +135,4 @@ hush: error in arithmetic
 42
 42
 42
-hush: can't exec 'a[b[c]d]=e': No such file or directory
+hush: can't execute 'a[b[c]d]=e': No such file or directory
diff --git a/shell/hush_test/hush-vars/var_posix1.right b/shell/hush_test/hush-vars/var_posix1.right
index 47d52a6c2..e6cba2758 100644
--- a/shell/hush_test/hush-vars/var_posix1.right
+++ b/shell/hush_test/hush-vars/var_posix1.right
@@ -32,4 +32,5 @@ ababcdc
 ababcdcd
 Empty:
 ababcdcd}_tail
+ababcdcd
 end
diff --git a/shell/hush_test/hush-vars/var_posix1.tests b/shell/hush_test/hush-vars/var_posix1.tests
index 3069360e1..c1f64094d 100755
--- a/shell/hush_test/hush-vars/var_posix1.tests
+++ b/shell/hush_test/hush-vars/var_posix1.tests
@@ -43,5 +43,6 @@ echo ${var%*}
 echo Empty:${var%%*}
 echo ${var#}}_tail
 # UNFIXED BUG: echo ${var#\}}_tail
+echo ${var%\\*}
 
 echo end