Fix closed resource handling in live debugger

[bwoebi]

Small NULL pointer deref.

[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2025-10-01 18:52:56

Comparing candidate commit 96244d2 in PR branch bob/fix-closed-resource with baseline commit 6bdf05a in branch master.

Found 1 performance improvements and 4 performance regressions! Performance is the same for 189 metrics, 0 unstable metrics.

scenario:SamplingRuleMatchingBench/benchRegexMatching1

• 🟥 execution_time [+38.168ns; +111.832ns] or [+3.176%; +9.305%]

scenario:SamplingRuleMatchingBench/benchRegexMatching2

• 🟥 execution_time [+61.656ns; +133.544ns] or [+5.195%; +11.252%]

scenario:SamplingRuleMatchingBench/benchRegexMatching3

• 🟥 execution_time [+93.869ns; +173.131ns] or [+8.032%; +14.814%]

scenario:SamplingRuleMatchingBench/benchRegexMatching4

• 🟥 execution_time [+83.830ns; +171.170ns] or [+7.116%; +14.531%]

scenario:TraceSerializationBench/benchSerializeTrace

• 🟩 execution_time [-28.331µs; -14.169µs] or [-6.440%; -3.221%]