Completed patch with mucho comments. Merge 8.5.bug_3173086

1 files changed, 6 insertions, 2 deletions

diff --git a/generic/tclCompile.c b/generic/tclCompile.c
index f2c4fdc..2d8d58c 100644
--- a/generic/tclCompile.c
+++ b/generic/tclCompile.c
@@ -454,12 +454,13 @@ Tcl_ObjType tclByteCodeType = {
  *	generate an byte code internal form for the Tcl object "objPtr" by
  *	compiling its string representation. This function also takes a hook
  *	procedure that will be invoked to perform any needed post processing
- *	on the compilation results before generating byte codes.
+ *	on the compilation results before generating byte codes. interp is
+ *	compilation context and may not be NULL.
  *
  * Results:
  *	The return value is a standard Tcl object result. If an error occurs
  *	during compilation, an error message is left in the interpreter's
- *	result unless "interp" is NULL.
+ *	result.
  *
  * Side effects:
  *	Frees the old internal representation. If no error occurs, then the
@@ -616,6 +617,9 @@ SetByteCodeFromAny(
 				 * compiled. Must not be NULL. */
     Tcl_Obj *objPtr)		/* The object to make a ByteCode object. */
 {
+    if (interp == NULL) {
+	return TCL_ERROR;
+    }
     (void) TclSetByteCodeFromAny(interp, objPtr, NULL, (ClientData) NULL);
     return TCL_OK;
 }