47997: Disable XTRACE around user-defined completion widgets.

ChangeLog

@@ -1,3 +1,9 @@
+2021-02-11  Bart Schaefer  <schaefer@zsh.org>
+
+	* unposted: NEWS, README: mention the effects of 47997.
+
+	* 47997: Src/Zle/compcore.c: disable xtrace around completions
+
 2021-02-07  Oliver Kiddle  <opk@zsh.org>
 
 	* 47944: Completion/BSD/Command/_bsd_pkg,

NEWS

@@ -30,6 +30,11 @@ The compinit function learnt a -w option to explain why compdump runs.
 The zsh/datetime module's strftime builtin learnt an -n option to omit
 the trailing newline when printing a formatted time.
 
+The XTRACE option is now disabled while running user-defined completion
+widgets.  This corresponds to long-standing behavior of other user ZLE
+widgets.  Use the _complete_debug widget to capture XTRACE output, or
+use "functions -T" to enable tracing of specific completion functions.
+
 Changes from 5.7.1-test-3 to 5.8
 --------------------------------
 

README

@@ -92,6 +92,9 @@ not set the new, fourth field will continue to work under both 5.8 and 5.9.
 (As it happens, adding a comma after "bold" will make both 5.8 and 5.9 do the
 right thing, but this should be viewed as an unsupported hack.)
 
+The XTRACE option is now disabled while running user-defined completion
+widgets.  See NEWS.
+
 Incompatibilities between 5.7.1 and 5.8
 ---------------------------------------
 

Src/Zle/compcore.c

@@ -821,6 +821,7 @@ callcompfunc(char *s, char *fn)
 	sfcontext = SFC_CWIDGET;
 	NEWHEAPS(compheap) {
 	    LinkList largs = NULL;
+	    int oxt = isset(XTRACE);
 
 	    if (*cfargs) {
 		char **p = cfargs;
@@ -830,7 +831,9 @@ callcompfunc(char *s, char *fn)
 		while (*p)
 		    addlinknode(largs, dupstring(*p++));
 	    }
+	    opts[XTRACE] = 0;
 	    cfret = doshfunc(shfunc, largs, 1);
+	    opts[XTRACE] = oxt;
 	} OLDHEAPS;
 	sfcontext = osc;
 	endparamscope();