FWIW I have validated that this fix does in fact fix the issue we were hitting in the IoT repo. Thanks for fixing @tmat

In the runtime repo this indeed fixes the issue. Just tried it (now with the -ci flag 😄 and validated that the symstore targets ran).

Merging to unblock runtime and iot PRs. Thanks for fixing @tmat

@tmat this is still broken for the runtime repository but now it fails when running Pdb2Pdb.exe.

D:\a\1\s.packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.19570.3\tools\SymStore.targets(64,5): error MSB3073: The command ""D:\a\1\s.packages\microsoft.diasymreader.pdb2pdb\1.1.0-beta2-19521-03\tools\Pdb2Pdb.exe" "D:\a\1\s\artifacts\bin\installer.tasks\Release\netstandard2.0\installer.tasks.dll" /out "D:\a\1\s\artifacts\SymStore\Release\installer.tasks\netstandard2.0\installer.tasks.pdb" /srcsvrvar SRC_INDEX=public" exited with code 3. [D:\a\1\s\tools-local\tasks\installer.tasks\installer.tasks.csproj]
##[error].packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.19570.3\tools\SymStore.targets(64,5): error MSB3073: (NETCORE_ENGINEERING_TELEMETRY=) The command ""D:\a\1\s.packages\microsoft.diasymreader.pdb2pdb\1.1.0-beta2-19521-03\tools\Pdb2Pdb.exe" "D:\a\1\s\artifacts\bin\installer.tasks\Release\netstandard2.0\installer.tasks.dll" /out "D:\a\1\s\artifacts\SymStore\Release\installer.tasks\netstandard2.0\installer.tasks.pdb" /srcsvrvar SRC_INDEX=public" exited with code 3.

https://dev.azure.com/dnceng/public/_build/results?buildId=433751&view=logs&jobId=7190fe20-9a4d-5ec6-b6bd-936671264aeb&taskId=2efa82f7-8523-5bc9-5322-0768c01fcfb7&lineStart=35&lineEnd=36&colStart=1&colEnd=471

ok, hopefully final fix: #4411
msbuild is fun! :)