* lisp/cedet/semantic/bovine.el: Fix recent regression

The conversion to `lexical-binding` introduced a regression because
`bovine/c.el` relied on inspecting the local variable `lse` in one of
its callers.

(semantic-bovinate-stream): Bind `lse` dynamically, because of
`semantic-parse-region-c-mode`.
(semantic-bovinate-nonterminal-check-map): Rename from
`semantic-bovinate-nonterminal-check-obarray` to hold some other kind
of table.
(semantic-bovinate-nonterminal-check): Use a hash-table instead of an obarray.

* lisp/cedet/semantic/bovine/c.el (semantic-parse-region-c-mode):
Declare use of `lse` via dynamic scoping.

* test/lisp/cedet/semantic-utest-c.el
(semantic-test-c-preprocessor-simulation): Re-enable test.

3 files changed, 18 insertions, 16 deletions

diff --git a/lisp/cedet/semantic/bovine.el b/lisp/cedet/semantic/bovine.el
index b585e387fed..6be6dfd8dfd 100644
--- a/lisp/cedet/semantic/bovine.el
+++ b/lisp/cedet/semantic/bovine.el
@@ -41,7 +41,7 @@
 
 ;;; Variables
 ;;
-(defvar-local semantic-bovinate-nonterminal-check-obarray nil
+(defvar-local semantic-bovinate-nonterminal-check-map nil
   "Obarray of streams already parsed for nonterminal symbols.
 Use this to detect infinite recursion during a parse.")
 
@@ -79,21 +79,18 @@ environment of `semantic-bovinate-stream'."
 (defun semantic-bovinate-nonterminal-check (stream nonterminal)
   "Check if STREAM not already parsed for NONTERMINAL.
 If so abort because an infinite recursive parse is suspected."
-  (or (vectorp semantic-bovinate-nonterminal-check-obarray)
-      (setq semantic-bovinate-nonterminal-check-obarray
-            (make-vector 13 nil)))
-  (let* ((nt (symbol-name nonterminal))
-         (vs (symbol-value
-              (intern-soft
-               nt semantic-bovinate-nonterminal-check-obarray))))
+  (or (hash-table-p semantic-bovinate-nonterminal-check-map)
+      (setq semantic-bovinate-nonterminal-check-map
+            (make-hash-table :test #'eq)))
+  (let* ((vs (gethash nonterminal semantic-bovinate-nonterminal-check-map)))
     (if (memq stream vs)
         ;; Always enter debugger to see the backtrace
         (let ((debug-on-signal t)
               (debug-on-error  t))
-          (setq semantic-bovinate-nonterminal-check-obarray nil)
-          (error "Infinite recursive parse suspected on %s" nt))
-      (set (intern nt semantic-bovinate-nonterminal-check-obarray)
-           (cons stream vs)))))
+          (setq semantic-bovinate-nonterminal-check-map nil)
+          (error "Infinite recursive parse suspected on %s" nonterminal))
+      (push stream
+            (gethash nonterminal semantic-bovinate-nonterminal-check-map)))))
 
 ;;;###autoload
 (defun semantic-bovinate-stream (stream &optional nonterminal)
@@ -110,6 +107,9 @@ list of semantic tokens found."
   (or semantic--buffer-cache
       (semantic-bovinate-nonterminal-check stream nonterminal))
 
+  ;; FIXME: `semantic-parse-region-c-mode' inspects `lse' to try and
+  ;; detect a recursive call (used with macroexpansion, to avoid inf-loops).
+  (with-suppressed-warnings ((lexical lse)) (defvar lse))
   (let* ((table semantic--parse-table)
          (matchlist (cdr (assq nonterminal table)))
          (starting-stream stream)
@@ -216,7 +216,8 @@ list of semantic tokens found."
                             (setq cvl (cons
                                        (if (memq (semantic-lex-token-class lse)
                                                  '(comment semantic-list))
-                                           valdot val) cvl))) ;append unchecked value.
+                                           valdot val)
+                                       cvl))) ;append unchecked value.
                           (setq end (semantic-lex-token-end lse))
                           )
                       (setq lte nil cvl nil)) ;No more matches, exit
diff --git a/lisp/cedet/semantic/bovine/c.el b/lisp/cedet/semantic/bovine/c.el
index 7be55ea9e10..5712f9b6df0 100644
--- a/lisp/cedet/semantic/bovine/c.el
+++ b/lisp/cedet/semantic/bovine/c.el
@@ -819,7 +819,9 @@ MACRO expansion mode is handled through the nature of Emacs's non-lexical
 binding of variables.
 START, END, NONTERMINAL, DEPTH, and RETURNONERRORS are the same
 as for the parent."
-  (if (and (boundp 'lse) (or (/= start 1) (/= end (point-max))))
+  ;; FIXME: We shouldn't depend on the internals of `semantic-bovinate-stream'.
+  (with-suppressed-warnings ((lexical lse)) (defvar lse))
+  (if (and (boundp 'lse) (or (/= start (point-min)) (/= end (point-max))))
       (let* ((last-lexical-token lse)
              (llt-class (semantic-lex-token-class last-lexical-token))
              (llt-fakebits (car (cdr last-lexical-token)))
diff --git a/test/lisp/cedet/semantic-utest-c.el b/test/lisp/cedet/semantic-utest-c.el
index b881cdb93b3..d08c79cad3e 100644
--- a/test/lisp/cedet/semantic-utest-c.el
+++ b/test/lisp/cedet/semantic-utest-c.el
@@ -43,10 +43,9 @@
 (defvar semantic-lex-c-nested-namespace-ignore-second)
 
 ;;; Code:
-;;;###autoload
 (ert-deftest semantic-test-c-preprocessor-simulation ()
   "Run parsing test for C from the test directory."
-  :tags '(:expensive-test :unstable)
+  :tags '(:expensive-test)
   (semantic-mode 1)
   (dolist (fp semantic-utest-c-comparisons)
     (let* ((semantic-lex-c-nested-namespace-ignore-second nil)