T14761c broken in hpc, profasm, and optasm ways

=====> T14761c(hpc) 5864 of 6893 [1, 6, 0]
cd "typecheck/should_compile/T14761c.run" &&  "/builds/ghc/ghc/inplace/bin/ghc-stage2" -c T14761c.hs -dcore-lint -dstg-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-missed-specialisations -fshow-warning-groups -fdiagnostics-color=never -fno-diagnostics-show-caret -Werror=compat -dno-debug-output -fno-warn-incomplete-patterns -O -fhpc 
Compile failed (exit code 1) errors were:
T14761c.hs:14:10: error: [-Werror]
    • Ignoring unusable UNPACK pragma on the first argument of ‘A’
    • In the definition of data constructor ‘A’
      In the data type declaration for ‘A’

*** unexpected failure for T14761c(hpc)

and

=====> T14761c(optasm) 5866 of 6893 [1, 7, 0]
cd "typecheck/should_compile/T14761c.run" &&  "/builds/ghc/ghc/inplace/bin/ghc-stage2" -c T14761c.hs -dcore-lint -dstg-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-missed-specialisations -fshow-warning-groups -fdiagnostics-color=never -fno-diagnostics-show-caret -Werror=compat -dno-debug-output -fno-warn-incomplete-patterns -O -fasm 
Compile failed (exit code 1) errors were:
T14761c.hs:14:10: error: [-Werror]
    • Ignoring unusable UNPACK pragma on the first argument of ‘A’
    • In the definition of data constructor ‘A’
      In the data type declaration for ‘A’

*** unexpected failure for T14761c(optasm)

Same for profasm.