posit regression tests are failing when compiled with clang18

[Ravenwater]

stillwater@b655be1a617a:/workspaces/universal/build_clang18$ cat Testing/Temporary/LastTestsFailed.log
185:posit_decode
193:posit_assignment
194:posit_conversion
195:posit_logic
196:posit_addition
197:posit_complex_add
199:posit_division
202:posit_literals
203:posit_multiplication
204:posit_negation
205:posit_randoms
206:posit_reciprocation
207:posit_sqrt
208:posit_subtraction
221:fast_posit_16_1
226:fast_posit_32_2
227:fast_posit_3_0
229:fast_posit_4_0
232:fast_posit_8_0
233:fast_posit_8_1
235:fast_quire_32_2
241:posit2_addition
243:posito_addition
245:posito_multiplication
247:posito_subtraction
605:c_api_shim_exact_test
608:c_api_shim_posit16
611:c_api_shim_posit4
613:c_api_shim_posit8

Some output of the failures:

Start testing: Jul 15 18:37 UTC

185/626 Testing: posit_decode
185/626 Test: posit_decode
Command: "/workspaces/universal/build_clang/static/posit/posit_decode"
Directory: /workspaces/universal/build_clang/static/posit
"posit_decode" start time: Jul 15 18:37 UTC
Output:

raw bits: 0001 posit bits: 0|001||-
Posit<4,0> decode failed: actual raw bits: 0001 posit bits: 0|001||-
0.5 required 0.25
raw bits: 0010 posit bits: 0|01-||-
raw bits: 0011 posit bits: 0|01-||-
raw bits: 0100 posit bits: 0|10-||-
raw bits: 0101 posit bits: 0|10-||-
raw bits: 0110 posit bits: 0|110||-
raw bits: 0111 posit bits: 0|111||-
raw bits: 1001 posit bits: 1|111||-
raw bits: 1010 posit bits: 1|110||-
raw bits: 1011 posit bits: 1|10-||-
raw bits: 1100 posit bits: 1|10-||-
raw bits: 1101 posit bits: 1|01-||-
raw bits: 1110 posit bits: 1|01-||-
raw bits: 1111 posit bits: 1|001||-
Posit<4,0> decode failed: actual raw bits: 1111 posit bits: 1|001||-
-0.5 required -0.25
b2p decode FAIL 2 failed test cases

Test time = 0.16 sec

Test Failed.
"posit_decode" end time: Jul 15 18:37 UTC
"posit_decode" time elapsed: 00:00:00

193/626 Testing: posit_assignment
193/626 Test: posit_assignment
Command: "/workspaces/universal/build_clang/static/posit/posit_assignment"
Directory: /workspaces/universal/build_clang/static/posit
"posit_assignment" start time: Jul 15 18:37 UTC
Output:

posit assignment validation: results only
assignment posit<3,0> FAIL 2 failed test cases
assignment posit<4,0> FAIL 6 failed test cases
assignment posit<4,1> FAIL 6 failed test cases
assignment posit<5,0> FAIL 14 failed test cases
assignment posit<5,1> FAIL 14 failed test cases
assignment posit<5,2> FAIL 14 failed test cases
assignment posit<6,0> FAIL 30 failed test cases
assignment posit<6,1> FAIL 30 failed test cases
assignment posit<6,2> FAIL 30 failed test cases
assignment posit<6,3> FAIL 30 failed test cases
assignment posit<7,0> FAIL 62 failed test cases
assignment posit<7,1> FAIL 62 failed test cases
assignment posit<7,2> FAIL 62 failed test cases
assignment posit<7,3> FAIL 62 failed test cases
assignment posit<8,0> FAIL 126 failed test cases
assignment posit<8,1> FAIL 126 failed test cases
assignment posit<8,2> FAIL 126 failed test cases
assignment posit<8,3> FAIL 126 failed test cases
assignment posit<8,4> FAIL 112 failed test cases
assignment posit<9,0> FAIL 254 failed test cases
assignment posit<9,1> FAIL 254 failed test cases
assignment posit<9,2> FAIL 254 failed test cases
assignment posit<9,3> FAIL 254 failed test cases
assignment posit<9,4> FAIL 224 failed test cases
posit assignment validation: FAIL

Test time = 0.16 sec

Test Failed.
"posit_assignment" end time: Jul 15 18:37 UTC
"posit_assignment" time elapsed: 00:00:00

194/626 Testing: posit_conversion
194/626 Test: posit_conversion
Command: "/workspaces/universal/build_clang/static/posit/posit_conversion"
Directory: /workspaces/universal/build_clang/static/posit
"posit_conversion" start time: Jul 15 18:37 UTC
Output:

posit conversion validation: results only
posit<3,0> conversion PASS
posit<4,0> conversion PASS
posit<5,0> conversion PASS
posit<6,0> conversion PASS
posit<7,0> conversion PASS
posit<8,0> conversion PASS
posit<9,0> conversion PASS
posit<3,0> conversion PASS
posit<4,0> conversion PASS
posit<5,0> conversion PASS
posit<6,0> conversion FAIL 5 failed test cases
posit<7,0> conversion FAIL 14 failed test cases
posit<8,0> conversion FAIL 30 failed test cases
posit<9,0> conversion FAIL 62 failed test cases
posit<4,1> conversion FAIL 17 failed test cases
posit<5,1> conversion FAIL 44 failed test cases
posit<6,1> conversion FAIL 92 failed test cases
posit<7,1> conversion FAIL 188 failed test cases
posit<8,1> conversion FAIL 380 failed test cases
posit<9,1> conversion FAIL 764 failed test cases
posit<5,2> conversion FAIL 44 failed test cases
posit<6,2> conversion FAIL 92 failed test cases
posit<7,2> conversion FAIL 188 failed test cases
posit<8,2> conversion FAIL 380 failed test cases
posit<9,2> conversion FAIL 764 failed test cases
posit<6,3> conversion FAIL 92 failed test cases
posit<7,3> conversion FAIL 188 failed test cases
posit<8,3> conversion FAIL 380 failed test cases
posit<9,3> conversion FAIL 759 failed test cases
posit conversion validation: FAIL

Test time = 0.17 sec

Test Failed.
"posit_conversion" end time: Jul 15 18:37 UTC
"posit_conversion" time elapsed: 00:00:00