Description of problem:
 Running /usr/share/systemtap/testsuite/systemtap.base/sdt.exp ...
 PASS: compiling sdt.c -O2  uprobe
-PASS: sdt -O2  uprobe
+FAIL: sdt -O2  uprobe
 PASS: compiling sdt.c -O3  uprobe
-PASS: sdt -O3  uprobe
+FAIL: sdt -O3  uprobe

(the rest of the testcase actually has FAIL->PASS transitions)

Version-Release number of selected component (if applicable):
Environment:
kernel-2.6.32-125.el6
elfutils-0.152-1.el6
systemtap-testsuite-1.4-4.el6

Systemtap:
systemtap-1.2-11.el6_0 PASS
systemtap-1.4-4 FAIL

How reproducible:
always

Steps to Reproduce:
1. cd /usr/share/systemtap/testsuite/
2. make RUNTESTFLAGS=systemtap.base/sdt.exp installcheck
3.

Actual results:
FAIL

Expected results:
PASS

Additional info:
systemtap.log.diff:
 executing: stap -w /usr/share/systemtap/testsuite/systemtap.base/sdt.stp sdt.c.exe.0 -c ./sdt.c.exe.0
-PASS: sdt -O2  uprobe
+FAIL: sdt -O2  uprobe
+line 1: expected "_"
+Got "semantic error: unable to find local 'arg1' near pc 0x80000538 in call1(/usr/share/systemtap/testsuite/systemtap.base/sdt.c) (alternatives: $a): identifier '$arg1' at /usr/share/systemtap/testsuite/systemtap.base/sdt.stp:8:18"
 Executing on host: gcc /usr/share/systemtap/testsuite/systemtap.base/sdt.c  -g -isystem/usr/share/systemtap/testsuite -isystem/usr/include -Wall -Wextra -Werror -O3  -lm   -o sdt.c.exe.1    (timeout = 300)
 spawn -ignore SIGHUP gcc /usr/share/systemtap/testsuite/systemtap.base/sdt.c -g -isystem/usr/share/systemtap/testsuite -isystem/usr/include -Wall -Wextra -Werror -O3 -lm -o sdt.c.exe.1
 PASS: compiling sdt.c -O3  uprobe
 executing: stap -w /usr/share/systemtap/testsuite/systemtap.base/sdt.stp sdt.c.exe.1 -c ./sdt.c.exe.1
-PASS: sdt -O3  uprobe
+FAIL: sdt -O3  uprobe
+line 1: expected "_"
+Got "semantic error: unable to find local 'arg1' near pc 0x80000538 in call1(/usr/share/systemtap/testsuite/systemtap.base/sdt.c) (alternatives: $a): identifier '$arg1' at /usr/share/systemtap/testsuite/systemtap.base/sdt.stp:8:18"