Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
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Snippet: 
******************** TEST 'MLIR :: Transforms/constant-fold-debuginfo.mlir' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/mlir-opt /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir -split-input-file -test-constant-fold -mlir-print-debuginfo | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/FileCheck /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir
# executed command: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/mlir-opt /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir -split-input-file -test-constant-fold -mlir-print-debuginfo
# executed command: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/llvm/redhat-linux-build/bin/FileCheck /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir
# .---command stderr------------
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir:5:17: error: CHECK-NEXT: expected string not found in input
# |  // CHECK-NEXT: [[C:%.+]] = arith.constant 6 : i32 loc(#[[UnknownLoc:.*]])
# |                 ^
# | <stdin>:2:27: note: scanning from here
# |  func.func @fold_and_merge() -> (i32, i32) {
# |                           ^
# | <stdin>:3:4: note: possible intended match here
# |  %c6_i32 = arith.constant 6 : i32
# |    ^
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir:20:12: error: CHECK: expected string not found in input
# |  // CHECK: arith.constant 1.{{0*}}e+00 : f32 loc(#[[UnknownLoc:.*]])
# |            ^
# | <stdin>:10:42: note: scanning from here
# |  func.func @materialize_different_dialect() -> (f32, f32) {
# |                                          ^
# | <stdin>:11:9: note: possible intended match here
# |  %cst = arith.constant 1.000000e+00 : f32
# |         ^
# | /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir:33:17: error: CHECK-NEXT: expected string not found in input
# |  // CHECK-NEXT: arith.constant 6 : i32 loc(#[[UnknownLoc:.*]])
# |                 ^
# | <stdin>:18:33: note: scanning from here
# |  func.func @materialize_in_front(%arg0: memref<8xi32>) {
# |                                 ^
# | <stdin>:19:12: note: possible intended match here
# |  %c6_i32 = arith.constant 6 : i32
# |            ^
# | 
# | Input file: <stdin>
# | Check file: /builddir/build/BUILD/llvm-21.0.0_pre20250610.g17999f01bbcda4-build/llvm-project-17999f01bbcda4ccdf5146cbecc562c60b2ca86e/mlir/test/Transforms/constant-fold-debuginfo.mlir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: module { 
# |             2:  func.func @fold_and_merge() -> (i32, i32) { 
# | next:5'0                                 X~~~~~~~~~~~~~~~~~~ error: no match found
# |             3:  %c6_i32 = arith.constant 6 : i32 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:5'1          ?                               possible intended match
# |             4:  return %c6_i32, %c6_i32 : i32, i32 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5:  } 
# | next:5'0       ~~~
# |             6: } 
# | next:5'0       ~~
# |             7:  
# | next:5'0       ~
# |             8: // ----- 
# | next:5'0       ~~~~~~~~~
# |             9: module { 
# | next:5'0       ~~~~~~~~~
# |            10:  func.func @materialize_different_dialect() -> (f32, f32) { 
# | next:5'0       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:20'0                                              X~~~~~~~~~~~~~~~~~~ error: no match found
# |            11:  %cst = arith.constant 1.000000e+00 : f32 
# | check:20'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:20'1             ?                                  possible intended match
# |            12:  return %cst, %cst : f32, f32 
# | check:20'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            13:  } 
# | check:20'0     ~~~
# |            14: } 
# | check:20'0     ~~
# |            15:  
# | check:20'0     ~
# |            16: // ----- 
# | check:20'0     ~~~~~~~~~
# |            17: module { 
# | check:20'0     ~~~~~~~~~
# |            18:  func.func @materialize_in_front(%arg0: memref<8xi32>) { 
# | check:20'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:33'0                                      X~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |            19:  %c6_i32 = arith.constant 6 : i32 
# | next:33'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:33'1                 ?                       possible intended match
# |            20:  affine.for %arg1 = 0 to 8 { 
# | next:33'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            21:  memref.store %c6_i32, %arg0[%arg1] : memref<8xi32> 
# | next:33'0      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            22:  } 
# | next:33'0      ~~~
# |            23:  return 
# | next:33'0      ~~~~~~~~
# |            24:  } 
# | next:33'0      ~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--


Answer: This shows the output that was gathered for the execution of test 'TEST 'MLIR :: Transforms/constant-fold-debuginfo.mlir' FAILED'. It might contain insights into why the test TEST 'MLIR :: Transforms/constant-fold-debuginfo.mlir' FAILED failed.