Fix incorrect path in pg_regress log messages.

Back-patch to 9.5 where the bug was introduced.

David Christensen

src/test/regress/pg_regress.c

@@ -2223,7 +2223,7 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 				 temp_instance);
 		if (system(buf))
 		{
-			fprintf(stderr, _("\n%s: initdb failed\nExamine %s/log/initdb.log for the reason.\nCommand was: %s\n"), progname, outputdir, buf);
+			fprintf(stderr, _("\n%s: initdb failed\nExamine %s/log/initdb.log for the reason.\nCommand was: %s\n"), progname, temp_instance, buf);
 			exit(2);
 		}
 
@@ -2353,7 +2353,7 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 			if (WaitForSingleObject(postmaster_pid, 0) == WAIT_OBJECT_0)
 #endif
 			{
-				fprintf(stderr, _("\n%s: postmaster failed\nExamine %s/log/postmaster.log for the reason\n"), progname, outputdir);
+				fprintf(stderr, _("\n%s: postmaster failed\nExamine %s/log/postmaster.log for the reason\n"), progname, temp_instance);
 				exit(2);
 			}
 
@@ -2361,7 +2361,7 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 		}
 		if (i >= 60)
 		{
-			fprintf(stderr, _("\n%s: postmaster did not respond within 60 seconds\nExamine %s/log/postmaster.log for the reason\n"), progname, outputdir);
+			fprintf(stderr, _("\n%s: postmaster did not respond within 60 seconds\nExamine %s/log/postmaster.log for the reason\n"), progname, temp_instance);
 
 			/*
 			 * If we get here, the postmaster is probably wedged somewhere in