Update xfail pattern in gdb.rust/simple.exp

In PR rust/26197, Tom de Vries notes that the variant part rewrite
caused some regressions for the Rust compiler he has.  This compiler
is unusual in that it combines a relatively recent rustc with a
relatively old LLVM -- so variant parts are not emitted using DWARF.

Most of the bugs in that PR were already fixed by earlier patches, but
some lingered.  After some research we found that some of these never
did work -- which is consistent with the investigations we did into
the debug info -- but instead were xfail'd.  This patch updates the
xfails to cope with the new output.  (After this, just one failure
remains.)

Tom de Vries tested this using his rustc and suggested a fix that
appears in this version.

gdb/testsuite/ChangeLog
2020-08-17  Tom de Vries  <tdevries@suse.de>
	    Tom Tromey  <tromey@adacore.com>

	PR rust/26197:
	* gdb.rust/simple.exp (xfail_pattern): Update for new failure.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 9fdbcb8703c40ff987ec67d6ee810b80f2001606..7c624589de2d51128186d92390d7cc21387f44fa 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-08-17  Tom de Vries  <tdevries@suse.de>
+           Tom Tromey  <tromey@adacore.com>
+
+       PR rust/26197:
+       * gdb.rust/simple.exp (xfail_pattern): Update for new failure.
+
 2020-08-17  Tom Tromey  <tromey@adacore.com>
 
        * gdb.ada/mi_var_access.exp: New file.

diff --git a/gdb/testsuite/gdb.rust/simple.exp b/gdb/testsuite/gdb.rust/simple.exp
index f0cad4e7634f45f11f6e1e4486d2a440b6ea475a..b32eaf1e4dce0063c6bd5a1cb15a7bbf27683010 100644 (file)
--- a/gdb/testsuite/gdb.rust/simple.exp
+++ b/gdb/testsuite/gdb.rust/simple.exp
@@ -239,7 +239,8 @@ gdb_test "print .." " = .*::ops::RangeFull"
 
 set pass_pattern \
     " = core::option::Option<\[a-z\]+::string::String>::Some\\(\[a-z\]+::string::String .*"
-set xfail_pattern " = <error reading variable>"
+set xfail_pattern \
+    "( = <error reading variable>|That operation is not available on .*)"
 gdb_test_multiple "print str_some" "" {
     -re "\[\r\n\]*(?:$pass_pattern)\[\r\n\]+$gdb_prompt $" {
        pass $gdb_test_name