utils/fork: handle termsig in safe_fork

Library/Homebrew/build.rb

@@ -240,7 +240,14 @@ rescue Exception => e # rubocop:disable Lint/RescueException
     error_hash["env"] = e.env
   when "ErrorDuringExecution"
     error_hash["cmd"] = e.cmd
-    error_hash["status"] = e.status.exitstatus
+    error_hash["status"] = if e.status.is_a?(Process::Status)
+      {
+        exitstatus: e.status.exitstatus,
+        termsig:    e.status.termsig,
+      }
+    else
+      e.status
+    end
     error_hash["output"] = e.output
   end
 

Library/Homebrew/exceptions.rb

@@ -579,19 +579,32 @@ class ErrorDuringExecution < RuntimeError
     @status = status
     @output = output
 
+    raise ArgumentError, "Status cannot be nil." if status.nil?
+
     exitstatus = case status
     when Integer
       status
+    when Hash
+      status["exitstatus"]
     else
-      status&.exitstatus
+      status.exitstatus
+    end
+
+    termsig = case status
+    when Integer
+      nil
+    when Hash
+      status["termsig"]
+    else
+      status.termsig
     end
 
     redacted_cmd = redact_secrets(cmd.shelljoin.gsub('\=', "="), secrets)
 
     reason = if exitstatus
       "exited with #{exitstatus}"
-    elsif (uncaught_signal = status&.termsig)
-      "was terminated by uncaught signal #{Signal.signame(uncaught_signal)}"
+    elsif termsig
+      "was terminated by uncaught signal #{Signal.signame(termsig)}"
     else
       raise ArgumentError, "Status neither has `exitstatus` nor `termsig`."
     end

Library/Homebrew/test/error_during_execution_spec.rb

@@ -5,7 +5,7 @@ describe ErrorDuringExecution do
   subject(:error) { described_class.new(command, status: status, output: output) }
 
   let(:command) { ["false"] }
-  let(:status) { instance_double(Process::Status, exitstatus: exitstatus) }
+  let(:status) { instance_double(Process::Status, exitstatus: exitstatus, termsig: nil) }
   let(:exitstatus) { 1 }
   let(:output) { nil }
 

Library/Homebrew/test/exceptions_spec.rb

@@ -186,7 +186,7 @@ describe "Exception" do
   describe ErrorDuringExecution do
     subject { described_class.new(["badprg", "arg1", "arg2"], status: status) }
 
-    let(:status) { instance_double(Process::Status, exitstatus: 17) }
+    let(:status) { instance_double(Process::Status, exitstatus: 17, termsig: nil) }
 
     its(:to_s) { is_expected.to eq("Failure while executing; `badprg arg1 arg2` exited with 17.") }
   end

Library/Homebrew/utils/fork.rb

@@ -51,7 +51,14 @@ module Utils
           # to rescue them further down.
           if e.is_a?(ErrorDuringExecution)
             error_hash["cmd"] = e.cmd
-            error_hash["status"] = e.status.exitstatus
+            error_hash["status"] = if e.status.is_a?(Process::Status)
+              {
+                exitstatus: e.status.exitstatus,
+                termsig:    e.status.termsig,
+              }
+            else
+              e.status
+            end
             error_hash["output"] = e.output
           end